Parameter | Description |
ABANDON_PRESSURE
| The pressure at which a reservoir was or is expected to be abandoned. |
ABANDON_TIME
| The time that a reservoir was or is anticipated to be abandoned. |
ABSOLUTE_ABUNDANCE
| Quantity of members in a group, as expressed as a count and count units, such as 5 sacks, 3 boxes, or 4 items. |
ABSOLUTE_DELTA_FLOWRATE
| Absolute value of Delta Flow Rate |
ABSOLUTE_PERMEABILITY
| The permeability of porous material when completely saturated with a wetting fluid and without the influence of non-Darcy (turbulence) effects. Also called "intrinsic" permeability. |
ABSOLUTE_ROUGHNESS
| Average amplitude of rugosity, such as the variations in the radius of tubing. |
ACCIDENT_TYPE
| Type of Quality, Health, Safety, and Environmental accident such as Fluid Spill, Kick While Drilling, Kick While Tripping, ... |
ACID_CONCENTRATION
| Concentration of acid. |
ACID_TREATMENT_COUNT
| Number of acid jobs |
ACOUSTIC_CONTRAST
| Interface property which is the difference between the Acoustic Impedance values of two adjacent beds. |
ACOUSTIC_IMPEDANCE
| Property which controls the propagation of an ultrasonic wave at a boundary interface. It is the product of the material density and the acoustic wave velocity within the material. |
ACOUSTIC_VELOCITY
| The velocity of an acoustic wave which represents the rate at which the wave travels from one point to another. |
ACQUISITION_ENABLE_FLAG
| Flag indicating whether or not acquisition is enabled for this activity. |
ACTIVATION_PRESSURE
| Pressure at which recording should begin |
ACTIVATION_TEMPERATURE
| Temperature at which recording should begin |
ADDRESS
| The location where some entity or information may be found or contacted. |
ADJUSTABLE_CHOKE_FLAG
| Flag indicating whether this flow period was performed on an adjustable choke, i.e., when set: adjustable choke, not set: fixed choke. |
ADMITTANCE
| The reciprocal of Impedance. The property of a medium to allow for the flow of an alternating current. |
ADSORPTION
| The adhesion in an extremely thin layer of molecules (as of gases, solutes, or liquids) to the surfaces of solid bodies or liquids with which they are in contact |
AFFINE_COEFF_A
| Coefficient "A" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AFFINE_COEFF_B
| Coefficient "B" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AFFINE_COEFF_C
| Coefficient "C" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AFFINE_COEFF_D
| Coefficient "D" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AFFINE_COEFF_E
| Coefficient "E" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AFFINE_COEFF_F
| Coefficient "F" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems. |
AGENCY_LEASE_NUMBER
| Unique lease number assigned by leasing agency |
AGREEMENT_INTEREST
| Percentage of interest held by one of the potentially many organizations holding a lease agreement. |
AGREEMENT_STATUS
| Status of a lease agreement. |
AIR_SUPPLY_PRESSURE
| Air supply pressure; for a burner, the pressure required to achieve effective atomization |
ALKALINITY
| Concentration of basic anions in an aqueous solution (e.g. OH-, CO3-- and HC03-) |
ALTERNATE_PHONE_NUMBER
| Alternate phone number, including country code. |
ALTITUDE
| Height above a reference level, usually the geoid (e.g., mean sea level). |
AMOUNT
| Quantity, total number |
AMOUNT_OF_SUBSTANCE
| The amount of a particular substance (e.g. chemical) expressed in units of moles. |
ANCHOR_TENSION
| Tension of the anchor chains or cables of a marine vessel; may be implemented as a vector. |
ANGULAR_VELOCITY
| Rotation rate, usually measured in revolutions per unit time; e.g., spinner speed, motor speed, etc. The term Angular Frequency is also used, but generally refers to data scaled in radians per second. |
ANNUAL_PAYMENT
| Annual amount of Payment based on some contractual agreement such as a lease. This could be rental, mortgage or other. |
ANTI_COLLISION_METHOD
| Method used for calculating the proximity: 0 - Normal; 1 - Horizontal; 2 - Least Distance |
API_COUNTRY_CODE
| Code used by the API (American Petroleum Institute) to identify sovereign nations, colonies, overseas territories, etc. |
API_ENTRANCE_HOLE_DIAMETER
| Entrance hole diameter in an API Section I test |
API_GRAVITY
| A measure of the density of hydrocarbons derived from the equation: API gravity = 141.5/(specific gravity @ 60 degF) - 131.5; usually reported with a temperature. |
API_NEUTRON
| The Neutron calibration measurement determined using the API test pit. This quantity is associated with the natural formation hydrogen concentration. |
API_TOTAL_PENETRATION
| Total penetration in an API Section I test |
API_WELL_NUMBER
| A unique well identification number as defined in the API (American Petroleum Institute) Bulletin D12A, as amended |
APPARENT_VISCOSITY
| Ratio Shear Stress/Shear Rate. Equal to Newtonian Viscosity for Newtonian fluid. |
ARCHIE_POROSITY_CONSTANT
| The constant "a" in the Archie formation resistivity factor - porosity relationship. |
ARCHIE_POROSITY_EXPONENT
| The exponent of the Porosity term in the Archie formation resistivity factor - porosity relationship. Abbreviated "m". |
AREA_PER_MASS
| An amount of surface corresponding to a unit mass. |
AUTHORIZATION_FOR_EXPENDITURE
| Identifier of granted or candidate request for authorization to spend money, usually for a specified purpose and amount. Abbreviated AFE |
AVG_PENETRATION_RATE
| Average drilling penetration rate (ROP) |
AVG_RESERVOIR_PRESSURE
| The average pressure (somewhere in the reservoir) between the borehole pressure and external boundary pressure. |
AVG_WEIGHT_ON_BIT
| Average "Weight On Bit" (WOB) |
AWARD_DATE
| Date lease awarded |
AXIAL_LENGTH
| The length associated with the longest dimension of an object. This corresponds to the height of a cylinder, or the longest axis of a rectangle. |
AZIMUTH
| The horizontal angle specified clockwise from true North. Occasionally azimuth will be specified relative to the South or Magnetic North. Also called True Bearing. |
BACK_PRESSURE_DROP
| Constant pressure drop on a flowline used mainly to approximate any kind of restriction, choke, nozzle ... |
BACKGROUND_PRESSURE_TREND
| Background pressure trend for a horizontal interference test |
BASE_FLUID_TYPE
| The type of the base fluid usually used in chemical mixing, such Oil or Water. |
BASE_FOR_SPACING
| A flag that determines which reference along a Borehole will be used to space Boreholes on a Cross Section. |
BAUD_RATE
| The speed at which data are transmitted, different from Bit_Rate due to protocol overhead. |
BEAUFORT_SCALE_NUMBER
| The Beaufort wind scale is a system used to estimate and report wind speeds when no measuring apparatus is available. It was invented in the early 19th century by Admiral Sir Francis Beaufort of the British Navy as a way to interpret winds from conditions at sea, e.g. 5 on the Beaufort scale corresponds to a wind of 17-21 knots and is defined as "Fresh Breeze: Moderate waves (1.8m), many white horses." |
BED_CHARACTER
| The Characteristic given to a Bed or layer (e.g. has sealing characteristic or is probable source rock.) |
BED_SET_TYPE
| The type of bed grouping |
BEND_1_ANGLE
| Angle of first bend in equipment item. |
BEND_1_TO_BOTTOM_CONN
| Length from the first bend to the bottom connection of the tool |
BEND_2_ANGLE
| Angle of second bend in equipment item. |
BEND_2_TO_BOTTOM_CONN
| Length from the second bend to the bottom connection of the tool |
BENDING_MOMENT_PER_LENGTH
| For a rotating body, the product of force and length of angular displacement normalized for the radius of rotation. |
BID_AMOUNT
| Amount of lease bid |
BID_NUMBER
| Bid number assigned by governing agency |
BIOT_COEFFICIENT
| The proportion of fluid pressure in a material which acts to counterbalance overburden pressure. Used in the calculation of net overburden: P_eff = P_overburden - (Biot_Coefficient * P_fluid) |
BIOTURBATION_TYPE
| The type of Bioturbation: the mixing of sediments by burrowing organisms. |
BIT_DEPTH
| Depth of the drillbit |
BLADE_GAUGE_LENGTH
| Length of the in-gauge portion of the blade. |
BLADE_HEIGHT
| Height of blade at gauge from the body of the equipment, such as a stabilizer. |
BLADE_LENGTH
| Length of blade measured along spiral; used for drill stabilizer blades. |
BLADE_SPIRAL
| Degree of spiral blade coverage 0, 270, 450, -270. (0-straight blade; Negative-left spiral; Positive-right spiral) |
BLADE_TO_CONN_2
| Distance from blade to Connection 2. |
BLADE_WIDTH
| Width of the blade at gauge, as used for drill stabilizer blades. |
BLOCKING_METHOD_TYPE
| Blocking method |
BOAT_TYPE
| Supply boat, tanker, dynamic positioning vehicle etc. |
BOB_NUMBER
| Bob number. The bob is the inner cylinder of a cylindrical rheometer. Each number corresponds to a different size. Standard bob is #1 |
BOILING_POINT
| The temperature at which fractions of a liquid boil. |
BORE_COUNT
| Number of bores, as in a production packer. |
BORED_FLAG
| Flag to indicate that equipment item has been bored. |
BOREHOLE_DIAMETER
| The inside diameter of a borehole. |
BOREHOLE_RADIUS
| Radius of the open borehole. Normally taken as the radius of the drillbit. |
BOTTOM_DEPTH
| Deepest depth of an interval |
BOTTOM_DIP_NUMBER
| Number of Dip (in the Dip Set) at the bottom of the Bed |
BOTTOM_DISCONTINUITY_TYPE
| Type of Discontinuity forming the bottom boundary. |
BOTTOM_VALUE
| Value at the bottom of an interval. |
BOTTOMHOLE_CIRCULATING_PRESSURE
| The pressure at the bottom of a borehole during circulation of any fluid. |
BOTTOMHOLE_CIRCULATING_TEMPERATURE
| The bottom hole temperature reached when circulating. Due to the cooling effect of the drill fluid, BHCT is below the BHST. |
BOTTOMHOLE_END_TYPE
| Indicates what limits the total depth (plug back, borehole bottom, bridge plug, sump packer ...) |
BOTTOMHOLE_FLOWING_PRESSURE
| Flowing pressure inside the wellbore at midpoint of the completed interval. Res. Eng. Pwf |
BOTTOMHOLE_FLOWING_TEMPERATURE
| Temperature at the bottom of the well while flowing. |
BOTTOMHOLE_PRESSURE
| The pressure at the bottom of a borehole generally associated with the pore pressure of the formation open to the well. |
BOTTOMHOLE_SHUTIN_PRESSURE
| The pressure at the bottom of a borehole with the well shut in. |
BOTTOMHOLE_STATIC_TEMPERATURE
| The bottom hole equilibrium temperature (when circulation is stopped) |
BOTTOMHOLE_TEMPERATURE
| The temperature at the bottom of a borehole occurring at the time of the activity being performed on the well. |
BOUND_WATER_CONDUCTIVITY
| Conductivity of water bound to clay in the formations. |
BOUND_WATER_RESISTIVITY
| Resistivity of water bound to clay in the formations. |
BOUND_WATER_SATURATION
| The extent to which the pore space in a formation contains bound water. |
BOWL_SPEED
| The bowl speed of a centrifuge. |
BOX_NUMBER
| Number of box in which an item or sample is stored. |
BREAKDOWN_PRESSURE
| The pressure required to create a hydraulic fracture in an unfractured formation; it is greater than fracture closure pressure except in rare cases, such as very low fracture toughness and very large horizontal stress anisotropy. |
BUBBLE_FLOW_VELOCITY
| The rate at which a fluid bubble, gas or liquid, flows through another fluid, gas or liquid. The Velocity depends on the densities and viscosities of the fluids. |
BUBBLE_POINT_PRESSURE
| The pressure at reservoir temperature at which gas in solution in crude oil comes out of solution as free gas. |
BUBBLE_POINT_TEMPERATURE
| The temperature at reservoir conditions at which gas in solution in crude oil comes out of solution as free gas. |
BUILDUP_PRESSURE
| Pressure recorded in the borehole at downhole conditions during a pressure buildup test. |
BULK_ADDITION_MODE
| Describes how the bulk material was added to the mixture. |
BULK_DENSITY
| Density of bulk material, including any void space or other materials contained in the subject volume. In well logging, it is the density of the rock, including fluid-filled pore space. |
BULK_MODULUS
| The stress-strain ratio under simple hydrostatic pressure. k = Delta P / (Delta V / V), where Delta P, V denotes the change in Pressure and Volume. |
BURNER_HEAD_COUNT
| Number of heads of the burner (conventionally, 3,4 or 6) |
BUSINESS_ASSOCIATE_JOB_TITLE
| The assignment of an administrative job title to a business associate in the context of a business association |
C2H6_CONCENTRATION
| Concentration of C2H6 by volume. Typical value in natural gas 6%. |
C3H8_CONCENTRATION
| Concentration of Propane (C3H8); typical volume concentration in natural gas is 2%. |
C4H10_CONCENTRATION
| Concentration of Butane (C4H10). |
C5H12_CONCENTRATION
| Concentration of Pentane (n-C5H12). |
C6H14_CONCENTRATION
| Concentration of Hexane (C6H14); typical volume concentration in natural gas is 0.3%. |
C7H16_CONCENTRATION
| Concentration of Heptane (C7H16) |
C7PLUS_CONCENTRATION
| Concentration of Heptane and hydrocarbons heavier than Heptane; typical volume concentration in natural gas is 0.5% |
CABLE_SPEED
| Cable speed, generally measured at the surface as an approximation of tool speed. |
CACL2_CONCENTRATION
| CaCl2 concentration. |
CALCIUM_CONCENTRATION
| Calcium concentration (Water Based Mud and water phase for Oil Based Mud) |
CALIBRATION_COEFFICIENT_CODE
| Calibration coefficient code for calibration performed with pressure sensor |
CALIBRATION_DATE
| The date of calibration for the equipment |
CAPACITANCE
| The ratio of charge (Q in coulombs) on a capacitor to the potential across it (V in volts) yields the Capacitance (C in Farads). |
CAPILLARY_NUMBER
| The ratio of capillary to viscous forces on fluids in a porous media. |
CAPILLARY_PRESSURE
| The difference in pressure between two phases, air fluid, gas fluid or between two fluids, measured at points of the interconnected phases. |
CAPILLARY_TRANSITION_ZONE_HEIGHT
| The vertical interval height that describes the transition between two different fluid phases in a porous media. This transition is caused by changes in saturation dependent capillary forces in equilibrium with gravitational forces. |
CASING_ROTATION_FRICTION_COEFFICIENT
| Friction coefficient due to rotation between casing and other surface (e.g. drill string). |
CASING_SHOE_DEPTH
| Casing shoe depth |
CASING_SLIDING_FRICTION_COEFFICIENT
| Friction coefficient due to sliding between casing and other surface (e.g. drill string), when only sliding motion is present |
CASING_TRANSLATION_FRICTION_COEFFICIENT
| Linear component of the friction coefficient between casing and drill string during an helical movement, e.g., reaming mode |
CATION_CONCENTRATION
| The concentration of cations, the positively charged particles, in the solution of an electrolyte. |
CATION_EXCHANGE_CAPACITY
| A measure of the extent to which a substance will supply exchange cations. |
CEMENT_SHEATH_THICKNESS
| Thickness of the cement sheath between casing and borehole wall. |
CENTRAL_LINE_BEARING
| Azimuth of central line of projection. |
CENTRAL_LINE_PT1_LATITUDE
| Latitude of first point on central line of projection. |
CENTRAL_LINE_PT1_LONGITUDE
| Longitude of first point on central line of projection. |
CENTRAL_LINE_PT2_LATITUDE
| Latitude of second point on central line of projection. |
CENTRAL_LINE_PT2_LONGITUDE
| Longitude of second point on central line of projection. |
CENTRAL_MERIDIAN
| The meridian on a graticule that is the axis of symmetry for the geometric properties of the graticule displayed on a map projection. |
CENTRALIZER_COUNT_PER_JOINT
| Number of centralizers per joint, e.g. 2 per joint. |
CENTRALIZER_TEST_TYPE
| The type of a Centralizer Test used to test a centralizer, usually during any well operation. |
CH4_CONCENTRATION
| Concentration of Methane (CH4); typical volume concentration in natural gas is 85%. |
CHANNEL_WIDTH
| The perpendicular distance between two parallel boundaries. |
CHEMICAL_CONCENTRATION
| The concentration of a chemical usually used during well operations, like drilling, cementing, acidizing, fracturing, etc. |
CHEMICAL_FORMULA
| A symbolic expression of the composition or constitution of a substance. |
CHLORIDE_CONCENTRATION
| Concentration of chloride ions in water based mud or in the water phase of oil based bud |
CHOKE_SIZE
| Internal diameter of the flow choke(s) |
CLASSIFICATION_METHOD_CODE
| Classification method used in this activity. |
CLAY_RESISTIVITY
| The Resistivity of clay, usually referring to that measured in the Earth formations. |
CLIENT
| The code of a client, usually that of a Service, Contractor, Vendor or E&P company |
CLIENT_REPRESENTATIVE
| Name of the client representative or company man. |
CO_CONCENTRATION
| Concentration of Carbon Monoxide (CO) |
CO2_CONCENTRATION
| Concentration of Carbon Dioxide (CO2) |
CO2_FOAM_QUALITY
| Ratio volume of CO2 over foam volume. Indicator of the quality of a foam generated with CO2 for well treatment. Below 50% the foam is not stable, above 95% the foam changes to a mist. C02 foam are used when low pH is required. |
COLOR
| The aspect of objects and light sources that may be described in terms of hue, lightness, and saturation for objects and hue, brightness, and saturation for light sources. |
COLOR_DISTRIBUTION
| A descriptive remark with respect to the distribution of a color within the area of a rock surface; e.g. solid, spotty, streaky. |
COLOR_FLUORESCENT_LIGHT
| The color emitted by the fluid upon exposure to fluorescent light. Certain photoactive hydrocarbon molecules display characteristic color patterns under these conditions. |
COLOR_INTENSITY
| A descriptive comment with respect to the intensity of color; e.g. bright, dull, powdery. |
COLOR_NORMAL_LIGHT
| The color of a hydrocarbon show under normal incident light. |
COMPANY_LEASE_NUMBER
| Unique lease number assigned by owning company |
COMPLETION_COUNT
| The count of the number of completions. |
COMPLETION_DATE
| Date well was completed |
COMPLETION_SKIN
| The skin effect resulting from the completion. |
COMPRESSIBILITY
| The change in specific volume and density under pressure; the reciprocal of Bulk Modulus, 1/k. |
COMPRESSIONAL_VELOCITY
| Velocity of a compressional acoustic wave (Vp). |
COMPRESSIVE_STRENGTH
| The degree of resistance of a material to force acting along one of the axes in a manner tending to crush it. |
COMPUTATION_MASK
| Application-specific mask for the computation options (one Anadrill example: 0001 - Torque & Drag, 0010 - BHA Tendency, 0100 - Bit Side Forces, 1000 - Buckling, 10000 - Yield Stress) |
COMPUTATION_TYPE
| Computation method used in the generation of data. |
CONCENTRATION
| The relative content of a component; e.g., the concentration of salts in brackish water, the concentration of electric charges in a circuit, etc. |
CONDUCTANCE
| The product of conductivity and thickness. With direct current, the reciprocal of resistance. With alternating current, the resistance divided by the impedance squared; the real part of impedance. |
CONDUCTIVITY
| A measure of the quantity of electricity transferred across unit area per unit potential gradient per unit time. In isotropic material, it is the reciprocal of Resistivity. Sometimes called Specific Conductance. |
CONFIDENCE_FACTOR
| The confidence factor associated with any event or feature related to or detected, for example a geologic feature in/on the Earth. |
CONFIDENTIALITY_LEVEL
| Describes the confidentiality of the information related to the well, e.g., Tight (operator only), Sensitive (some restriction), Public |
CONN_1_BOX_FLAG
| Flag indicating if Connection 1 is a Box (Y) or a Pin (N). |
CONN_1_OUTSIDE_DIAMETER
| Outside diameter of tool joint/connection 1 |
CONN_1_SIZE
| Size of the top or the first standard tool connection. |
CONN_1_THREAD_TYPE
| Complete and non ambiguous identification of the first threaded connection, e.g., "Hydril Joint Type EIU", "Pittsburgh Special ACME-Thread Casing-Internal-upset" |
CONN_1_TYPE
| Type of the top or the first standard tool connection. |
CONN_2_BOX_FLAG
| Flag indicating if Connection 2 is a Box (Y) or a Pin (N). |
CONN_2_OUTSIDE_DIAMETER
| Outside diameter of tool joint/connection 2 |
CONN_2_SIZE
| Size of the bottom or second standard tool connection. |
CONN_2_THREAD_TYPE
| Complete and non ambiguous identification of the second threaded connection, e.g., "Hydril Joint Type EIU", "Pittsburgh Special ACME-Thread Casing-Internal-upset"Description of the threaded connection |
CONN_2_TYPE
| Type of the bottom or second standard tool connection. |
CONNECTEDNESS_COEFFICIENT
| A coefficient describing the connectedness of items, such as the connectedness between inclusions (e.g. lenses) in the Earth subsurface formations. |
CONSISTENCY_INDEX
| The k parameter in the Power-Law and Herschel-Bulkley rheological models. The Power_Law model is "Shear_Stress=k times (Shear_Rate at the power of n)". The unit of k is traditionally lbf.sec^n/ft^2 or Pa.s^n. |
CONTACT_SYMBOL
| Symbol to post on the Feature_Boundary at the intersection point with another Feature_Boundary |
CONTACT_TYPE
| The type of contact or interface between Earth subsurface regions |
CONTRACT_STATUS
| Status of a contract. |
COOLANT_TEMPERATURE
| Temperature of the cooling fluid |
CORE_BOX_COUNT
| The number of core boxes containing samples from a cored borehole interval in a praticular well. |
CORE_DATE
| Date on which the core was recovered. |
CORE_PRESERVATION_METHOD
| Method by which a core sample has been preserved. |
CORE_SIZE
| The outer diameter of the core which is, or was intended to be retrieved from the cored interval. |
CORING_FLUID_TYPE
| The type of fluid that was in the borehole at the time the coring operation was in progress; e.g. water, brine, oil, mud, etc. |
CORING_METHOD
| The type of method used to acquire a core sample; e.g. Rotary Conventional, Rotary Sponge, Sidewall Mechanical, etc. |
CORRELATION_COEFFICIENT
| Coefficient of a correlation used to determine the quality of the correlation |
CORROSION_RATE
| The rate at which corrosion, a complex chemical or electrochemical process by which metal is destroyed, occurs. For example the rate at which a casing pipe rusts (corrodes). |
CORROSIVE_FLUID_FLAG
| Is the fluid corrosive? (Y/N) Used to apply a wall erosion model to measure the pipe wall thickness. |
COST
| Amount of money spent to obtain goods or services. |
COST_PER_DEPTH
| Amount of money per unit of length |
COST_PER_VOLUME
| Amount of money per unit of volume |
COUNTRY_CODE
| Catalog-controlled code of a Country. |
COUNTY_CODE
| Catalog-controlled code of a County or Parish. |
CRITICAL_GAS_SATURATION
| Critical Saturation for Gas |
CRITICAL_OIL_SATURATION
| Critical Saturation for Oil |
CRITICAL_PRESSURE
| The pressure needed to condense a vapor at its critical temperature. Applies to pure components; for mixtures use Pseudocritical_Pressure. |
CRITICAL_TEMPERATURE
| The highest temperature at which a fluid can exist as a liquid and above which its vapor cannot be liquefied regardless of the amount of pressure. Applies to pure components; for mixtures use Pseudocritical_Temperature. |
CRITICAL_VOLUME
| The inverse of density at the critical point of a fluid, describing the volume occupied by a fluid of unit mass. |
CRITICAL_WATER_SATURATION
| The highest water saturation a rock maintain while producing hydrocarbons before water will begin to flow. |
CROSS_SECTION_AREA
| The cross-sectional area of an object; e.g., area of perforation in a cased borehole. |
CROSSFLOW_COEFFICIENT
| Characterization of the flow in the reservoir from one layer to another layer, usually known as "Omega" in Reservoir Dynamics |
CRUSHED_ZONE_PERMEABILITY
| Permeability of the Crushed Zone around perforation |
CRUSHED_ZONE_THICKNESS
| Thickness of the Crushed Zone around perforation |
CUMULATIVE_GAS_VOLUME
| Cumulative gas production at standard conditions. |
CUMULATIVE_OIL_VOLUME
| Cumulative oil production at standard conditions. |
CUMULATIVE_WATER_INFLUX
| The cumulative volume of water that encroaches into a reservoir. |
CUMULATIVE_WATER_VOLUME
| Cumulative water production at standard conditions. |
CURRENCY_CODE
| Money currency (US$, French franc..) |
CURVATURE
| A measure of the degree to which a path is curved relative to the length of the path along the curve. |
CYCLE_SAMPLE_COUNT
| Target number of samples per hour. |
CYCLIC_REDUNDANCY_CHECK
| CRC test value for this Calibration Coefficient set. |
DAILY_PROGNOSIS
| Description of activities and events anticipated during the next 24 hours. |
DAMAGED_ZONE_PERMEABILITY
| Permeability of the near-wellbore Damaged Zone |
DAMAGED_ZONE_THICKNESS
| Thickness of the near-wellbore Damaged Zone |
DATA_ACQUISITION_MODE
| Software or hardware option whose selection controls some aspect of data acquisition. |
DATA_DIRECTION
| Direction of data flow, e.g. Input, Output or both. |
DATA_REDUCTION_TYPE
| Method used for data reduction, e.g. Linear decimation, Logarithmic, etc. |
DEAD_VOLUME
| Volume of material remaining in a container after normal emptying procedure, and thus not available for use. |
DEAD_WEIGHT
| Weight of material unavailable for use remaining in a container |
DECIMATION_FACTOR
| Number indicating the degree of data reduction from decimation (resampling at lower sampling frequency); e.g. a Decimation_Factor of 5 indicates that only every 5th input sample is retained as output. |
DEGREE_OF_CONFIDENCE
| The degree of confidence associated with any event or feature related to or detected, for example a geologic feature in/on the Earth (high, low, etc.) |
DENSITY
| The density (mass per unit volume) of a material. Usually at Standard conditions (STP). Also used to indicate the frequency of occurrence. |
DENSITY_IN
| Density of the input material, such as the drilling fluid in the mixing tank. |
DENSITY_OUT
| Density of the output fluid, such as the drilling fluid returning from the well annulus. |
DEPOSITIONAL_ENVIRONMENT_TYPE
| The type of deposition that has created a particular Earth environment, e.g. Reef, Beachrock, Pointbar, etc. |
DEPTH
| The perpendicular measurement downward from a surface. Also, the direct linear measurement from the point of viewing usually from front to back. |
DERIVATIVE_MODEL
| Derivative Model used in evaluating this Transient, e.g., Backward, Central, or Forward. |
DERIVATIVE_TYPE
| Type of derivative used in evaluating this transient. |
DESCRIPTION
| The description or complete definition of any data item or object |
DEVIATION_SKIN
| The skin effect caused by the well trajectory not being perpendicular to the bedding plane. |
DEW_POINT_PRESSURE
| The pressure at which a liquid phase condenses from a vaporous fluid in equilibrium at a given temperature. |
DIAMETER
| Diameter of an entity with a spherical or cylindrical shape, such as the borehole, an item of drillstring equipment, etc. |
DIELECTRIC_CONSTANT
| The ratio of the Permittivity of a material to that of free space. |
DIFFERENTIAL_CALIPER
| The difference between the actual borehole diameter and bit size. |
DIFFERENTIAL_PRESSURE
| The difference between the pressures of two systems, or between the pressures measured at different points in a system. |
DIFFERENTIAL_SPEED
| The differential speed between the bowl and the conveyor of a centrifuge. |
DIFFUSIVITY
| A measure of the tendency for diffusion to occur. See Hydraulic_Diffusivity. |
DIGITAL_FILE_FORMAT_VERSION
| Identification of the digital file format version (e.g., 3.0a). Note that this information is often encoded within the file. |
DIMENSIONLESS_BOREHOLE_RADIUS
| Dimensionless Borehole Radius ("rwD") |
DIMENSIONLESS_BOUNDARY_DISTANCE
| Distance to a boundary divided by wellbore radius |
DIMENSIONLESS_CHANGING_STORAGE_PRESSURE
| Dimensionless changing wellbore storage pressure ("CphiD") |
DIMENSIONLESS_FRACTURE_CONDUCTIVITY
| Ratio of fracture conductivity (fracture permeability x average width) to the (matrix permeability x fracture half_length) product. Standard industry acronym : "FCD", S.P.E. preferred form "CfD". |
DIMENSIONLESS_INTERWELL_DISTANCE
| Dimensionless inter-well distance for a horizontal interference test |
DIMENSIONLESS_LAYER_DIFFUSIVITY
| Ratio of layer storativity ratio to layer transmissibility ratio ("etaDj") |
DIMENSIONLESS_RECTANGLE_LENGTH
| Rectangle length divided by reference length ("BxD") |
DIMENSIONLESS_RECTANGLE_WIDTH
| Rectangle width divided by reference length ("ByD") |
DIMENSIONLESS_WELL_X_POSITION
| Well position expressed as fraction of rectangle length ("xbx") |
DIMENSIONLESS_WELL_Y_POSITION
| Well position expressed as fraction of rectangle width ("yby") |
DIP_ANGLE
| The maximum angle that a surface; e.g., a bedding or fault surface, makes with the horizontal, measured perpendicular to the strike direction of the structure and is measured in the vertical plane. |
DIP_AZIMUTH
| Azimuth of a dipping plane in the Earth subsurface, usually around borehole |
DIP_NUMBER
| An ordinal identifier that characterizes uniquely each dip |
DIP_PATTERN_SHAPE
| Shape of a dip pattern, e.g. Convex, Concave, etc. |
DIP_QUALITY_CUTOFF
| The lowest dip quality taken into account for an interpretation. |
DIP_TYPE
| The type of dipping associated with subsurface planes; e.g., Cross_Bedding, Fault, Fracture, Bed_Boundary, etc. |
DIP_VALID_ZONE_TYPE
| This property specifies whether the zone where the dips were computed corresponded to a Blank zone with no dips, a Mirror Image zone, or a borehole Washout zone. |
DIRECTION_CHANNEL_TO_AXIS
| Azimuth of the direction to a axis, usually pertaining to a sedimentary channel. |
DIRECTION_CHANNEL_TO_FLOW
| Azimuth of the direction to flow, usually pertaining to a sedimentary channel. |
DIRECTION_CHANNEL_TO_LAND
| Azimuth of the direction to land, usually pertaining to a sedimentary channel. |
DIRECTION_CURRENT
| The azimuth of the flow direction that insured transportation an deposition of the sediments. |
DIRECTION_DOWNTHROWN_BLOCK
| Azimuth of the direction to the downthrown block in case of faulting in the Earth subsurface. |
DIRECTION_OVERTHRUST
| Azimuth of the direction of overthrust in case of faulting in the Earth subsurface. |
DIRECTION_TO_SOURCE
| The direction from which sediments are brought |
DIRECTIONAL_PERMEABILITY
| An oriented permeability within a porous media, expressed either as horizontal (along the bedding plane of the stratum) or vertical (perpendicular to the bedding plane of the stratum), or within a coordinate system. |
DISCLAIMER
| Legal text on the front page describing the legal status of this document as regard of liability. |
DISPLACEMENT_EFFICIENCY
| The fraction of displaceable fluids/hydrocarbons that has been actually displaced when contacted by a displacing fluid. |
DISPLACEMENT_VELOCITY
| The velocity of the shock or displacement front. |
DISPLAY_INDEX_TYPE
| Type of index used for display; e.g. MD, DSRD, TVD etc. |
DISPLAY_NAME
| A name which is used for display purposes, as opposed to the formal controlled name (Code) which is used for interoperability. |
DISTANCE
| Amount of separation between two points, lines, surfaces, or objects measured along the shortest path joining them. |
DISTANCE_UNIT
| Unit for distance data, typically m or ft. |
DOSING_MODE
| The way an additive is measured e.g. By Weight Of Cement, BOW, gl/sk .... |
DOWELL_CHEMICAL_CODE
| Reference to the Dowell chemical product catalog |
DOWN_LOAD
| Downward load exerted on an equipment item. |
DOWNSTREAM_ORIFICE_GAS_PRESSURE
| Pressure of gas separator gas line downstream of orifice plate when a sample is taken |
DOWNTIME
| Time during which equipment is not operational condition or is otherwise unavailable. |
DOWNTIME_RATIO
| Non-operational time of an equipment with respect to total time in location |
DRAINAGE_AREA
| The drainage area of a reservoir. |
DRAINAGE_AREA_SHAPE_FACTOR
| The shape factor for enclosed drainage areas, used to correct pseudosteady-state flow performance behavior of sinks in non-circular drainage regions. |
DRAWDOWN_PRESSURE
| The difference in shut in and flowing bottomhole pressures, at a constant rate of fluid production. |
DRILL_BIT_GRADE_WEAR
| Drill Bit wear grading in percentage. |
DRILL_OPERATION_MASK
| Mask for the drilling operating mode, such as 0001 - Rotating, 0010 - Sliding, 0100 - Reaming, 1000 - Trip in, 10000 - Trip out |
DRILL_SLOT_CLUSTER_TYPE
| Generic type of drill slot cluster such as template and pad |
DRILLER_TOTAL_DEPTH
| The total depth of the well borehole as reported by the drilling contractor. |
DRILLSTRING_DRIVE_TORQUE
| Torque applied to the drillstring, measured at the rotary table or top-drive. |
DRY_GAS_CRITICAL_PRESSURE
| The pressure needed to condense a dry gas at its critical temperature (Dry gas = free gas without condensate) |
DRY_GAS_CRITICAL_TEMPERATURE
| The highest temperature at which a gas can exist as a liquid and above which its vapor cannot be liquefied regardless of the amount of pressure (Dry gas = free gas without condensate) |
DRY_GAS_GRAVITY
| The ratio of the molecular weight of the dry gas to that of air (Dry gas = free gas without condensate) |
DUNE_SHAPE
| Shape of a Dune type depositional environment, e.g. Dome, Parabolic, etc. |
DURATION
| Elapsed time from the start to the finish of a process or activity. |
ECCENTRICITY
| The ratio of the focus-to-center distance to the length of the semi-major axis of an ellipse. |
EFF_FORMATION_STRESS
| Effective Stress of completed interval |
EFF_RESERVOIR_RADIUS
| The characteristic radius of a reservoir used to quantify the behavior of a reservoir. This is the radius that a reservoir would have if circular in shape. |
EFFECTIVE_DATE
| The date on which a contract becomes effective or put in force. |
EFFECTIVE_LENGTH_THICKNESS_RATIO
| A measure of the tendency of a permeable stratum to exhibit vertical equilibrium of flowing fluids, defined as: (length / height) * SQRT(kv/kh), where length is the characteristic length of the flow path and height is the gross or net height. |
EFFECTIVE_PERMEABILITY
| The measure of the capacity of a single fluid to flow through a rock when the pore spaces of the rock are not completely filled or saturated with the fluid. |
EFFECTIVE_PERMEABILITY_GAS
| The measure of the capacity of gas to flow through a rock when the pore spaces of the rock contain other fluids. |
EFFECTIVE_PERMEABILITY_OIL
| The measure of the capacity of oil to flow through a rock when the pore spaces of the rock contain other fluids. |
EFFECTIVE_PERMEABILITY_WATER
| The measure of the capacity of water to flow through a rock when the pore spaces of the rock contain other fluids. |
EFFECTIVE_POROSITY
| The porosity available to free fluids, excluding unconnected porosity and space occupied by bound water and disseminated shale. |
EFFICIENCY
| Effective operation as measured by a comparison of production with cost (as in energy, time, and money). |
ELASTIC_LIMIT
| The greatest stress that can be applied without causing permanent deformation (limit of applicability of Hooke law). |
ELASTIC_MODULUS
| The stress-strain properties of isotropic materials which obeys Hooke law, for small formations, are specified by elastic moduli. |
ELECTRIC_POTENTIAL
| A measure of Voltage |
ELECTRIC_SUSCEPTIBILITY
| The ratio of electric field to electric polarization. |
ELECTRICAL_PENETRATION
| The apparent borehole diameter as viewed by electrical measurements |
ELLIPSOID_CODE
| Code of the ellipsoid to which geodetic coordinates are referenced. |
ELLIPSOID_NAME
| Name of the ellipsoid to which geodetic coordinates are referenced. |
ELLIPTICITY
| The ratio of the major to minor axes of an ellipse. In electromagnetic surveying, the ratio for the polarization ellipse which can be determined by measuring the amplitudes and phases of 2 orthogonal components of the magnetic field. |
END_AGE
| The latest (numerically smallest) geologic or geochronologic age associated with an event or item, such as an earth layer, a fossil or pollen type. |
END_AGE_CODE
| The code of the latest (most recent) geologic or geochronologic age associated with an event or item, such as an earth layer, a fossil or pollen type. |
ENGINE_OIL_PRESSURE
| Pressure of the lubrication oil |
ENGINE_OIL_TEMPERATURE
| Engine lubrication Oil Temperature |
ENGINE_TOTAL_TIME
| Time spent by an engine in operating condition since the last overhaul. |
ENTHALPY
| The internal energy of a thermodynamic system plus the product of its pressure and volume. |
EOU_COMPUTATION_METHOD
| Method used for calculating the ellipse of uncertainty: 0 - Wolfe & de Wardt; 1 - Conic |
EOU_CONE_DEPTH_INCREMENT
| Depth increment of the ellipse of uncertainty cone |
EOU_CONE_GROWTH_RATIO
| Ratio of the ellipse of uncertainty cone radius increase per depth increment |
EOU_CONE_SURFACE_RADIUS
| The radius of the ellipse of uncertainty cone at the surface location |
EQUILIBRATION_RATIO
| The equilibrium vaporization ratio, or ratio of the mole fraction of a fluid system component in the vapor phase divided by the mole fraction of the same component in the liquid phase. |
EROSION_STATE
| Describes if the event has been partially, totally, etc. subjected to erosion. |
ESTIMATED_BOREHOLE_VOLUME
| The estimated volume of the Open Hole Volume used in fluid volume/placement computations |
EXECUTION_DATE
| The date that a contract is executed, usually the date of signing of the last signatory |
EXISTENCE_KIND
| Classification of the lifecycle state of an entity: actual, planned, predicted, etc. |
EXPANSION_FACTOR
| A factor that accounts for the change in gas density due to pressure changes, as across an orifice. |
EXPIRY_DATE
| The date at which a contract terminates or is no longer in force. If the expiry date is amended, this is the amended date. |
EXTERNAL_DRAINAGE_RADIUS
| The characteristic radius to the outer drainage boundary of a field or a reservoir |
EXTRAPOLATED_PRESSURE
| Extrapolated pressure from infinite-acting analysis |
EXTRAPOLATED_PRESSURE_SPH
| Extrapolated pressure from spherical flow analysis |
FACIES_TYPE
| The type of a Facies in the Earth subsurface |
FAN_SHAPE
| Shape of a Fan type depositional environment, i.e. Elongated or Crescent. |
FANN_TEST_PRESSURE
| The pressure at which the Fann test was performed. |
FANN_TEST_TEMPERATURE
| The temperature at which the Fann test was performed. |
FAULT_CHARACTER
| The characterization of a Fault in the Earth subsurface, e.g. Sealing, Non Sealing, Constant Pressure, etc. |
FAULT_CONTROL_FLAG
| Flag marking if a layer is affected by faulting. |
FAULT_DETECTION_SOURCE
| The source of the data used to detect faults (e.g., Seismic data, Structural analysis, Dipmeter log data, etc.) |
FAULT_DISPLACEMENT
| The measure of the relative movement of the 2 sides of a fault. |
FAULT_DISTORTION_TYPE
| The type of distortion associated with a fault plane, e.g. Rollover, Drag, etc. |
FAULT_HADE
| The angle that a fault plane makes with the vertical. |
FAULT_HEAVE
| Horizontal component of separation or displacement on a fault. |
FAULT_STRIKE
| The azimuth of the strike of a fault. |
FAULT_THROW
| Length of the vertical displacement of a Fault. |
FAULT_TRANSMISSIBILITY
| Ratio of fault transmissibility to formation transmissibility. |
FAULTING_TIME_WRT_SEDIMENTATION
| Time of faulting with respect to the sedimentation process, e.g. Post Deposition, Post Compaction, etc. |
FAULTING_TIME_WRT_TILT
| Time of faulting with respect to tectonic events which tilted the bed, e.g. Anterior, Posterior |
FAX_NUMBER
| Telephone number used for FAX (facsimile) transmission and/or reception. |
FEATURE_INTERSECTION_TYPE
| Defines how a Wellbore intersects with a Geologic Feature |
FILE_NAME
| The name of a computer data file. |
FILE_SYSTEM_NAME
| Name of computer operating system component which deals with data file storage, e.g. NFS (Unix), RMS (VMS). |
FILE_TYPE
| Generic property for computer file types. |
FILTER_CAKE_RESISTIVITY
| Resistivity of Mud Filter Cake |
FILTER_CAKE_THICKNESS
| Filter cake thickness in API test |
FILTRATE_CACL2_CONCENTRATION
| Filtrate CaCl2 concentration in the water phase of Oil Based Mud |
FILTRATE_VISCOSITY
| The viscosity of the fluid filtrate i.e. the viscosity of the fluid which crossed the filtering media. |
FILTRATE_VOLUME
| Volume of filtrate, such as recovered from an API Fluid Loss test. API RP13 Section 3 |
FINAL_TRANSFER_PRESSURE
| Final pressure of shipping bottle |
FINAL_TRANSFER_TEMPERATURE
| Final temperature of shipping bottle |
FIRING_HEAD_TYPE
| Type of TCP Equipment: firing head, debris sub, shock absorber, etc. |
FISHNECK_DIAMETER
| Diameter of the fishing neck of an equipment item. |
FISHNECK_LENGTH
| Length of the fishing neck of an equipment item. |
FLATTENING_DEPTH
| Depth at which flattening should be calculated based on the flattening feature. |
FLEX_JOINT_ANGLE
| Angle between riser and blowout preventer at the flex joint. |
FLOW_BEHAVIOR_INDEX
| The n parameter in the Power-Law and Herschel-Bulkley rheological models. The Power_Law model is "Shear_Stress=k times (Shear_Rate at the power of n)". n is dimensionless. |
FLOW_CAPACITY
| The characteristic of a layer in a permeable system that describes the fraction of greater permeability-thicknesses for a layer with respect to the system permeability-thickness. |
FLOW_DIRECTION
| Indicates the flowing mode of a well completion; typically Injector or Producer. |
FLOW_DIRECTION_SETUP
| Indicates the wellbore flow direction for which an equipment item has been configured. |
FLOW_REGIME
| The flow condition of a multiphase process stream; e.g. slug, mist, or stratified flow. |
FLOW_TYPE
| The type of flow of a fluid, e.g. Laminar, Pivot, etc. |
FLOW_VELOCITY
| Flow velocity of fluid. |
FLOWING_CONDITION_DEPTH
| Depth at which bottomhole data were acquired |
FLOWING_FLUID_TYPE
| Type of fluid flowing into or out of a well completion: Condensate, Oil, Gas, etc. |
FLOWRATE
| A measure of the volume of fluid flowing per unit time. |
FLOWRATE_GRADIENT
| A measure of the change in the flowrate of a fluid per unit length. |
FLUID_COMPRESSIONAL_VELOCITY
| Acoustic velocity of an acoustic (compressional) wave in fluid. |
FLUID_CONDUCTIVITY
| Conductivity of a fluid. |
FLUID_DENSITY
| Density of a fluid sample; e.g., from Borehole, Formations, Cores, etc. Also density of cement. |
FLUID_PERMEABILITY_FACTOR
| Fraction of the fracture permeability retained at in-situ conditions after taking into account the damage due to fluid residue, function of the breaker, gel concentration and temperature at closure. Has the same effect as Proppant_Permeability_Factor. |
FLUID_PHASE
| The phase of a fluid (gas or liquid) |
FLUID_RESISTIVITY
| Resistivity of a fluid. |
FLUID_RETURN_ELEVATION
| Elevation of the drill fluid return line measured from the defined elevation reference datum (normally kelly bushing or rig floor). Note that if the elevation is negative, the return line is below the elevation reference datum. |
FLUID_RETURN_OUTLET
| Return outlet for a fluid (e.g. Sea bed, Rig floor...) |
FLUID_TEMPERATURE
| The temperature of a fluid (sample) under certain conditions. |
FLUID_TYPE
| The type of fluid. Usually associated with a formation, a reservoir, borehole, etc. |
FLUID_VISCOSITY
| The viscosity of a fluid (sample) at specific temperature and pressure conditions. |
FLUSHED_ZONE_WATER_SATURATION
| The extent to which the pore space in a flushed zone around the borehole contains oil. |
FLUX_LEAKAGE
| The magnetic field forced out in the air by the distortion of the field within the pipe caused by the presence of a discontinuity |
FOREIGN_SYSTEM
| Type of seismic system: Charisma, IESX |
FORMATION_COMPRESSIVE_STRENGTH
| The compressive strength of an earth formation. |
FORMATION_CONDUCTIVITY
| Formation Conductivity |
FORMATION_DAMAGE_SKIN
| The skin effect caused by mechanical formation damage such as invasion of drilling fluids |
FORMATION_RESISTIVITY
| True Formation Resistivity |
FORMATION_RESISTIVITY_FACTOR
| Ratio of the resistivity of water-saturated rock to that of the water solution contained in the rock. Also called Formation Resistivity Factor and abbreviated "F". |
FORMATION_RESISTIVITY_SW100
| Resistivity of formation, assuming 100% water-saturated. |
FORMATION_STIFFNESS_FACTOR
| Dimensionless estimate of the formation stiffness, i.e., ratio between the applied pressure and the displacement of the formation. |
FORMATION_VOLUME_FACTOR
| The ratio of the volume occupied by a fluid at specified conditions, such as reservoir conditions, to the volume which would be occupied at standard conditions. |
FRACTION_ABOVE_DEPTH_POINT
| Unitless fraction of an image that is displayed above the depth associated with the image. |
FRACTURE_AZIMUTH
| The azimuth of a fracture usually in an interval of the borehole. |
FRACTURE_CLOSURE_PRESSURE
| Magnitude of the stress required to open a preexisting fracture. Assumed to be equal to the least principal stress which acts perpendicular to the face of the fracture, trying to keep it closed. Above it, the fracture is open, closed below. |
FRACTURE_CLOSURE_TIME
| Time required by a hydraulic fracture to close. Can be derived from a Nolte plot (pressure vs. time). The more fluid that fluid leaks off into the formation, the faster the fracture closes. |
FRACTURE_CONDITION
| Characterizes the condition of the fracture with respect to its void space; e.g. Open, Closed, Vuggy, etc. |
FRACTURE_CONDUCTIVITY
| Fracture permeability - width product of a finite conductivity vertical or horizontal fracture. |
FRACTURE_ELEMENT_DISTRIBUTION_TYPE
| Type of spatial variation (linear or elliptical) of fracture height, width and conductivity |
FRACTURE_ELEMENT_HEIGHT
| Height of fracture element |
FRACTURE_ELEMENT_WIDTH
| Width of fracture element |
FRACTURE_FACE_SKIN
| The skin along the face of the fracture. |
FRACTURE_HALF_LENGTH
| The length of one wing of a fracture, from the bore hole to one of its ends. |
FRACTURE_HEIGHT
| Height of a fracture. |
FRACTURE_ORIENTATION
| The orientation of a fracture relative to north. |
FRACTURE_ORIGIN
| Characterizes the origin of a fracture i.e. natural (inherent) or induced. |
FRACTURE_PRESSURE
| Fluid pressure in the wellbore required to undergo hydraulic fracturing. |
FRACTURE_PRESSURE_GRADIENT
| Ratio of the Frac Pressure by the true vertical depth. Typical values for a reservoir range from 0.4-0.6 psi/ft for a depleted rerservoir to 0.8-1.0 psi/ft for deep high pressure formation. |
FRACTURE_SPACING
| The distance between adjacent fractures. |
FRACTURE_STORATIVITY
| Fracture Storativity (Porosity * Total Compressibility product) of a finite conductivity vertical fracture ("(phi*Ct)f") |
FRACTURE_TOUGHNESS
| Measure of the rock resistance to crack propagation (Hydraulic Fracturing). Must not be confused with tensile strength. Obtained by compressing a slice of core with a central hole. Expressed as Pressure times square root of length. |
FRACTURE_TYPE
| Type of formation fracture. |
FRACTURE_WIDTH
| Width of a fracture. |
FRACTURING_EFFICIENCY
| Ratio of Fracture Volume at end of job to Total Volume Pumped. The difference between the two volumes represents the volume which leaked off into the formation. |
FREE_GAS_OIL_RATIO
| The ratio of the volume of free gas to the volume of oil for a reservoir fluid at standard conditions. |
FROM_CONN_NUMBER
| Indicates which end (1 or 2 for tubulars, 3 for a hydraulic tee,...) of the "From" equipment is connected to the "To" equipment |
FROM_DATUM_CODE
| Code of the source datum used in a datum-to-datum coordinate system transformation (datum shift). |
FROM_MOUNTING_LOCATION
| Location of the from Equipment in a From-To connection : Inside, Outside, Top, Bottom. If A is mounted on top of B in the borehole and if From_Id=A, To_Id=B, then From_Mouting_Location=Top. If Packer P is set inside casing C, with From_Id=P, To_Id=C then From_Mouting_Location=Inside |
FROM_OFFSET
| The distance from the mid-point of the "From" equipment to the bottom of the "To" equipment in a From_To connection. |
FUNDAMENTAL_STRENGTH
| The stress a material is able to withstand a long time under a given set of conditions (temperature, pressure, solution, etc.) without deforming continuously. |
FUNNEL_VISCOSITY
| Time needed for a given quantity of fluid (generally a quart of mud) to flow into a specified size funnel (3/16 inch id tube of a 12 inch long funnel). Used for drilling fluids. |
GAP_LENGTH
| The length of gap usually detected in some pattern or geological feature. The length is usually an interval length like depth. |
GAS_COMPRESSIBILITY
| The compressibility of gas at a given pressure and temperature. |
GAS_DENSITY
| Density of gas (air, hydrocarbon, etc.) at a particular temperature and/or pressure; e.g., gas density at well bottomhole conditions or at well surface conditions. |
GAS_DESCRIPTION_TYPE
| Type of data describing the gas: complete hydrocarbon composition, impurities (H2S, CO2,N2) or gas gravity. |
GAS_DEVIATION_FACTOR
| Dimensionless quantity expressing how a gas deviates from perfect gas law, commonly expressed by PV=ZnRT. Sometimes named Gas Compressibility Factor, Z usually varies from 0.7 to 1.2. |
GAS_DIFFERENTIAL_PRESSURE
| Gas differential pressure across the orifice plate when a sample is taken |
GAS_FLAG
| Flag indicating presence of gas |
GAS_FLOW_VELOCITY
| Flow velocity of gas component of fluid. |
GAS_FLOWRATE
| Rate of flow of gas |
GAS_FLUID_RATIO
| The ratio of gas within a fluid otherwise named foam quality when the gas is used to foam the fluid. |
GAS_FORMATION_VOLUME_FACTOR
| Ratio of gas volume at specified (typically, reservoir) conditions to the gas volume at surface (stock tank) conditions. Normally abbreviated Bg. |
GAS_FRACTION
| Volumetric fraction of gas in the total fluid |
GAS_LINE_DIAMETER
| Diameter of the gas line |
GAS_LIQUID_RATIO
| Volume ratio of gas to liquid (oil + water) in a volume of fluid. |
GAS_PRESSURE_AXIS_TYPE
| One of the pressure transformations used in Gas Well Interpretation |
GAS_SAMPLING_POINT
| The location where gas samples are taken on the separator |
GAS_SATURATION
| The extent to which the pore space in a formation contains gas. |
GAS_SORPTION_STORATIVITY_RATIO
| Ratio of the stored gas in the kerogen (solid hydrocarbon) to the total gas stored in the system |
GAS_VISCOSITY
| The viscosity of a gas at specific temperature and pressure conditions. |
GAS_WATER_CONTACT_DEPTH
| Depth at which the gas water contact has been identified in a Reservoir Unit |
GAS_WATER_SOLUBILITY
| Measure of the degree to which a gas is soluble in water, often designated Rs Water |
GAUGE_COUNT
| Number of gauges |
GAUGE_LENGTH
| Length of the in-gauge portion of an equipment item. |
GENERAL_WEATHER_DESCRIPTION
| Description of current weather conditions. |
GENUS
| A category of biological classification ranking between the family and the species. A class, kind, or group marked by one or more common characteristics. |
GEOCENTRIC_DX
| X component of the translation of the center of a geodetic datum. One of seven parameters used in the Bursa-Wolf transformation. |
GEOCENTRIC_DY
| Y component of the translation of the center of a geodetic datum. One of seven parameters used in the Bursa-Wolf transformation. |
GEOCENTRIC_DZ
| Z component of the translation of the center of a geodetic datum. One of seven parameters used in the Bursa-Wolf transformation. |
GEOCENTRIC_RX
| Rotation of the geocentric Cartesian coordinate system about its X axis. One of seven parameters used in the Bursa-Wolf transformation. |
GEOCENTRIC_RY
| Rotation of the geocentric Cartesian coordinate system about its Y axis. One of seven parameters used in the Bursa-Wolf transformation. |
GEOCENTRIC_RZ
| Rotation of the geocentric Cartesian coordinate system about its Z axis. One of seven parameters used in the Bursa-Wolf transformation. |
GEODETIC_COORD_SYS_CODE
| Type of a geodetic coordinate system. This property specifies whether the Geodetic coordinate system used to record position data is Cartesian or Latitude/Longitude. |
GEODETIC_COORD_SYS_NAME
| Name of a geodetic coordinate system. |
GEODETIC_DATUM_CODE
| Code of the reference system that describes the position, orientation and scale relationship of the ellipsoid and the earth, such that referenced coordinates are unique. |
GEODETIC_DATUM_NAME
| Name of the reference system that describes the position, orientation and scale relationship of the ellipsoid and the earth, such that referenced coordinates are unique. |
GEOGRAPHIC_LOCATION
| Geographical location, either the nearest city or geographical spot or a free text telling where the location is. |
GEOLOGIC_AGE
| The geologic or geochronological age of an item or event, such as an earth layer. This is usually the average age. |
GEOLOGIC_AGE_CODE
| Reference code of a geologic age; e.g., Paleozoic, Permian, etc. classified according to the type of geologic age unit (Era, Epoch, etc.). |
GEOLOGIC_AGE_TYPE
| Type of geologic age unit; e.g., Era, Period, Epoch, Age. |
GF_BASELINE
| GeoFrame baseline that was used for processing |
GOOSENECK_RADIUS
| Radius of the gooseneck in a Coil Tubing Unit, along which the tubing is bent; used in the fatigue model |
GRADING_DATE
| Date equipment condition or state was graded. |
GRAIN_DENSITY
| The density of a unit volume of a mineral or other rock material at zero porosity. Sometimes called Matrix Density. |
GRAIN_DISTRIBUTION
| Textual description of the grain distribution in a rock sample. |
GRAIN_SIZE
| Average diameter of a mineral grain or set of grains. |
GRANULOMETRIC_SEQUENCE_TYPE
| This property specifies whether the granules making up a Earth subsurface sequence are coarsening up or fining up. |
GRAVEL_PACKED_PERFORATION_LENGTH
| Length of the portion of the perforation which is filled with Gravel Pack material. |
GRAVITY
| Strength of the gravitational field at some location. Also referred to as the acceleration of gravity, measured in units of acceleration. |
GROSS_AREA
| Gross area of a region such as that of a lease parcel or covered by a lease agreement. |
GROUP
| An assemblage of related organisms - often used to avoid taxonomic connotations when the kind or degree of relationship is not clearly defined. |
H2S_CONCENTRATION
| Concentration of H2S generally measured in ppm. H2S concentration is critical in evaluating the corrosion of metal (e.g. coiled tubing) under stresses. |
H2S_FLAG
| Indicates that hydrogen sulfide (H2S) has been detected. |
HEAT_FLUX
| The quantity of thermal energy which passes through a cross-sectional area per unit time. |
HEAT_RELEASE_RATE
| The quantity of heat released in a material per unit time. Also known as mixing power. |
HEAT_TRANSFER_COEFFICIENT
| Amount of heat transferred per unit time per degree per unit area. |
HEAVY_PHASE_FLOW_VELOCITY
| Flow velocity of heavy phase component of fluid. |
HEIGHT
| The distance from the bottom to the top of something standing upright. Also, the extent of elevation above a level. |
HEMISPHERE
| Code of the earth hemisphere (Northern or Southern) in which this projection is located. |
HGS_CONCENTRATION
| High gravity solids Concentration |
HGS_REMOVAL_EFFICIENCY
| Ratio of mass rate of HGS (high Gravity Solid) discarded through the underflow of a piece of SCE (Solids Control Equipment) to the mass rate of HGS fed into it |
HIERARCHICAL_FLAG
| Flag indicating that the entities participate in a hierarchy. |
HOLE_AZIMUTH
| The angle between a vertical plane tangent to the borehole and north. |
HOLE_CONDITION_TYPE
| The type of a borehole condition. |
HOLE_DEVIATION
| Angle between the borehole axis and the vertical (also known as the Drift Angle). |
HOLE_ROTATION_FRICTION_COEFFICIENT
| Friction coefficient between open hole and drill string in rotation |
HOLE_SLIDING_FRICTION_COEFFICIENT
| Friction coefficient between open hole and drill string in sliding (translation only) operating mode |
HOLE_TRANSLATION_FRICTION_COEFFICIENT
| Vertical component of the Friction coefficient between open hole and drill string during an helical movement, e.g., reaming mode |
HORIZONTAL_PERMEABILITY
| A permeability oriented horizontally along the bedding plane of the stratum. Usually abbreviated as Kx. |
HORIZONTAL_SIZE
| The size of any object as measured horizontally |
HORIZONTAL_WELL_FLOWING_LENGTH
| Total Horizontal Well Flowing Length |
HORIZONTAL_WELL_STANDOFF
| Horizontal Well Standoff from reservoir boundary |
HYDRAULIC_DRIVE_PRESSURE
| Pressure of the hydraulic fluid delivered to an Hydraulic motor |
HYDRAULIC_DRIVE_TEMPERATURE
| Temperature of the hydraulic fluid delivered to an Hydraulic motor |
HYDRAULIC_MODEL_TYPE
| Type of Flow Behavior for the Hydraulic Unit, including the Inner Boundary Type + Reservoir Behavior Type + Outer Boundary Type |
HYDRAULIC_POWER
| Power produced or available from a system due to fluid flow, such as for pumps and turbines. |
HYDRAULIC_UNIT_TOP_TO_FLOWING_TOP
| Distance from Top of Hydraulic Unit to Top of Flowing Interval |
HYDRAULIC_UNIT_TOP_TO_PERFORATION_TOP
| Distance from Top of Hydraulic Unit to Top of Perforation |
HYDROCARBON_DENSITY
| Density of hydrocarbons. |
HYDROCARBON_PORE_VOLUME
| The pore volume of a reservoir occupied by hydrocarbons in either the vapor or liquid phase. |
HYDROCARBON_SATURATION
| The fraction of pore volume filled with hydrocarbons. |
HYDROGEN_INDEX
| The ratio of the number of hydrogen atoms per unit volume of a material to that number in pure water at 75 degF. Neutron logging response depends mainly on hydrogen index. |
I_C4H10_CONCENTRATION
| Concentration of iso-Butane (i-C4H10); typical volume concentration in natural gas is 0.3%. |
I_C5H12_CONCENTRATION
| Concentration of iso-Pentane (i-C5H12); typical volume concentration in natural gas is 0.3%. |
IADC_CODE
| International Association of Drilling Contractor Code, used for drill bits. |
ICS_CENTER
| Schlumberger-GeoQuest Center where processing was completed |
ILLUMINANCE
| The intensity of light striking a surface. |
IMAGE_CLIPPING_REGION
| Vector of pixel values indicating which portion of an input image is represented in a clipped output; the structure of the vector is [Offset from Top, Offset from Left, Height, Width]. |
IMAGE_ORIGIN_AZIMUTH
| The azimuth of a point on an object corresponding to the origin of an image of the object (left side of core image) |
IN_SERVICE_DATE
| The date on which an equipment item or product was placed in service. |
INCLINATION
| The vertical angle between a line and the horizontal. |
INCLUSION_PROPORTION
| Percentage of rocks occupied by inclusions within a given depth interval |
INCLUSION_TYPE
| The type of inclusions in a rock e.g. pebble, nodules, etc. |
INDEX_TYPE
| Type of index for indexed data, such as Measured Depth (MD), True Vertical Depth (TVD), etc. |
INERTIAL_FLOW_COEFFICIENT_CORRELATION_TYPE
| Inertial Flow Coefficient Correlation (e.g. Saucier, Firoozabadi, etc. ) |
INERTIAL_FLOW_CORRELATION_COEF
| Cooke's inertial fracture flow correlation coefficient (b). Empirical coefficient relating Fracture inertial flow coefficient Beta to Fracture permeability. Non RP66 Unit |
INERTIAL_FLOW_CORRELATION_EXPONENT
| Cooke's inertial fracture flow correlation exponent (a). Empirical coefficient relating Fracture inertial flow coefficient Beta to Fracture permeability. |
INITIAL_FINAL_WELLBORE_STORAGE_RATIO
| Ratio of early-time (initial) to final wellbore storage factor ("Ca/C") |
INITIAL_GAS_OIL_RATIO
| Solution gas oil ratio at the beginning of the production. |
INITIAL_GAS_VOLUME
| Volume of gas accumulated prior to the beginning of the measurement period. |
INITIAL_OIL_VOLUME
| Volume of oil accumulated prior to the beginning of the measurement period. |
INITIAL_RESERVOIR_PRESSURE
| Initial reservoir pressure, before any production or injection occurs, normally abbreviated Pi; sometimes taken as the pressure at the external boundary of the drainage area. |
INITIAL_RESERVOIR_PRESSURE_DATE
| Date when initial reservoir pressure data were recorded |
INITIAL_RESERVOIR_PRESSURE_DEPTH
| Depth reference of initial reservoir pressure |
INITIAL_RESERVOIR_PRESSURE_TEMPERATURE
| Temperature taken when initial reservoir pressure recorded |
INITIAL_WATER_VOLUME
| Volume of water accumulated prior to the beginning of the measurementperiod. |
INJECTOR_HEAD_WEIGHT
| Weight of the injector head of a coiled tubing unit |
INLET_FLOWRATE
| Flow Rate at the inlet of an equipment (e.g. suction side of a pump) |
INLET_PRESSURE
| Pressure at the inlet of an equipment. |
INNER_BOUNDARY_CONDITION_TYPE
| Description of the inner boundary condition for a well test model. |
INNER_OUTER_STORATIVITY_RATIO
| Radially composite system storativity ratio [inner/outer bank] |
INNER_PIPE_OUTSIDE_DIAMETER
| Outer diameter of the inner pipe |
INSIDE_DIAMETER
| Inside diameter of an entity, such as an item of drillstring equipment |
INTERFACIAL_TENSION
| The tension between two interfaces; e.g., light and heavy fluid phases, gas-liquid, gas-oil, gas-water. Also called surface tension or surface tensity |
INTERFAULT_ANGLE
| The smallest angle between two intersecting sealing faults in a wedge well test model. |
INTERPOLATION_METHOD
| Interpolation method used in the generation of data. |
INTERPOROSITY_FLOW_COEFFICIENT
| Describes the conductance of flow from matrix to fissures. Usually known as Lambda in reservoir dynamics. |
INTERRUPTION_TYPE
| The type of interruption in the Earth subsurface, e.g. Missing Section, Repeat Section, etc. |
INTERVAL_LENGTH
| The length of any interval along a path, such as a Borehole path. |
INTERVAL_TRANSIT_TIME
| The travel time of a wave over a unit distance, hence the reciprocal of wave velocity. |
INTERWELL_DISTANCE
| Inter-well distance for a horizontal interference test |
INTERWELL_STORATIVITY_THICKNESS
| Inter-well Storativity-Thickness [phi*Ct*h] for a horizontal interference test. |
INTRINSIC_SAFETY_CERTIFICATION_MARKING
| Mark made on an equipment item defining the type of intrinsic certification. Typical marking includes certifying authority symbol, type of protection, protection group for electrical apparatus and temperature class, e.g., "EEx ia I T5": CENELEC Intrinsic Safety-2 faults Methane 100 degree C. |
INTRINSIC_SAFETY_FLAG
| When set, indicates that the equipment has been certified for use in a hazardous area. Equipment so certified has been examined by a National Certifying Authority and, where necessary, tested and found to comply with the requirement of a standard specification for the appropriate concept. |
INVESTIGATION_RADIUS
| The radius of a circle (or cylinder) containing about 80% of the measurements. |
INVESTIGATION_RADIUS_INCREASE
| Increase of candidate borehole investigation radius |
IRREDUCIBLE_WATER_SATURATION
| The fraction of the pore volume occupied by water in a reservoir at maximum hydrocarbon saturation, such that it cannot be further reduced. |
JOB_COUNT
| Number of jobs performed or included. |
JOB_REFERENCE_NUMBER
| Reference Number of a particular interpretation job. |
JOINT_COUNT
| The number of joints of tubular goods. |
KICK_TOLERANCE_VOLUME
| Estimate of the volume of a kick (influx of fluid into the wellbore) at bottom hole conditions which can be shut in and circulated out without breaking the formation |
KINEMATIC_VISCOSITY
| The dynamic viscosity of a fluid divided by the density of the fluid. |
LAG_USAGE_FLAG
| When set, wavelet lag is used. |
LANDING_COLLAR_DEPTH
| Measured depth of the collar on which the cement plugs seat : this data is required to compute the displacement volume of a cementing operation. |
LANGUAGE
| Name of spoken or written language, such as English, Spanish, French, Mandarin, Russian, Chichimeq... |
LAST_CALIBRATION_DATE
| Date when a sensor was last calibrated |
LAST_STATIC_PRESSURE_DEPTH
| Depth at which last reservoir pressure data were recorded |
LAST_STATIC_RESERVOIR_PRESSURE
| Last reservoir pressure recorded |
LATENT_HEAT
| The amount of thermal energy required to convert an unit mass of liquid at its boiling point to completely vapor. |
LATITUDE
| The angle between the axis of the Earth and a tangent to the ellipsoid which approximates the shape of the Earth. |
LATITUDE_LONGITUDE_UNIT
| Unit for Latitude and Longitude data. |
LAYER_STORATIVITY_RATIO
| Ratio of layer storativity to total storativity ("omegaj") |
LAYER_TRANSMISSIBILITY_RATIO
| Ratio of layer transmissibility to total transmissibility ("kappaj") |
LEAKOFF_HEIGHT
| Portion of the zone fracturing fluids will leak off into. It can be an aggregate of a number of geologic formations. |
LEASE_NAME
| Name of a lease |
LEASE_STATUS
| Status of a lease. |
LEASE_SUFFIX
| Suffix associated with lease (e.g., OCS-G) |
LEFT_HIDDEN_WIDTH
| For core images, the width of the core which is hidden on the left side of the image (by core box, for example). |
LEGAL_DESCRIPTION
| Legal description associated with a legal document or agreement, for instance, a description of the boundaries of a lease. |
LENGTH
| Linear extent of a measured distance or dimension. |
LENGTH_RECOVERED
| Length of a sample recovered from some well operation (e.g. Core Sample). |
LESSOR_BONUS
| Bonus payed to lessor for signing |
LGS_CONCENTRATION
| Low gravity solid Concentration |
LGS_REMOVAL_EFFICIENCY
| Ratio of the mass rate of LGS (low gravity solid) in the underflow of a piece of SCE (Solids Control Equipment) to the mass rate of LGS fed into it |
LIGHT_PHASE_FLOW_VELOCITY
| Flow velocity of light phase component of fluid. |
LIME_CONCENTRATION
| Lime content in water based mud as determined per API RP13P Section 8 |
LINE_THICKNESS
| Line drawing width (thin, medium, fat, very_fat) |
LINEAR_THERMAL_EXPANSION
| The change in length of a material as a fraction of its total length due to a change in temperature at a constant pressure. |
LINEAR_WEIGHT
| Weight of an equipment item per unit length; e.g. Casing weight, pipe weight, cable weight, etc. |
LIQUID_FLOW_VELOCITY
| Flow velocity of liquid component of fluid. |
LIQUID_GAS_RATIO
| Volume ratio of liquid (oil + water) to gas in a volume of fluid. |
LIQUID_RADIUS
| Liquid radius in the Bowl = Bowl Inner Radius - Pond_Depth |
LIQUID_VISCOSITY
| The viscosity of a liquid at specific temperature and pressure conditions. |
LITHO_TYPE
| Lithotype (Sandstone, Limestone, etc.) |
LITHOLOGIC_COLOR
| The characteristic color of a lithologic sample. |
LOCAL_COORD_SYS_CODE
| Catalog Code of a locally defined coordinate system. |
LOCAL_COORD_SYS_NAME
| Name of a local coordinate system. |
LOG_ANALYST
| Name of the Log Analyst who did the processing |
LOGGER_TOTAL_DEPTH
| The total depth of the well borehole as reported by the logging contractor. |
LOGGING_CABLE_FLAG
| Y/N: tells if there is a wireline cable inside the tubing allowing logging |
LONGITUDE
| Angle measured about the spheroid (or ellipsoid) axis from a local prime meridian to the meridian through the point. A positive value denotes East. |
LONGITUDE_REFERENCE_1
| Longitude of first reference point in projection definition. |
LONGITUDE_REFERENCE_2
| Longitude of second reference point in projection definition. |
LONGITUDINAL_DISPERSIVITY_COEFFICIENT
| A coefficient used as a multiplier of interstitial velocity to estimate dispersion in the direction of movement for a displacement front in permeable media. |
LOST_TIME_FLAG
| Flag indicating whether or not an event caused a delay in operation. |
LOW_POWER_FLAG
| Flag indicating whether or not the tool is operating in low power consumption mode. When the flag is set, the sensor warmup duration is taken into account. |
LOWER_FLUID_TYPE
| The type of fluid found in the layer below a reference surface (e.g. Water in layer below a Fluid Contact in a Reservoir.) |
LOWER_SURFACE_RELATION
| The type of relationship between a surface and the ones below (e.g. the surfaces below a Horizon are eroded). |
MAGNESIUM_CONCENTRATION
| Magnesium concentration in a material. |
MAGNETIC_DECLINATION
| The horizontal angle measured from a meridian to the direction of magnetic north as determined by a freely suspended magnet. Positive if magnetic North is east of True North. |
MAGNETIC_FIELD_STRENGTH
| The force per unit magnetic pole (or current per unit length). Also called Magnetizing Force or Magnetic Intensity. |
MAGNETIC_FLUX
| The flux through a surface is the integral over the surface of the normal component of the magnetic induction. |
MAGNETIC_PERMEABILITY
| The three-dimensional inductance of a material, a measure of the magnetic induction produced in a material by a given magnetic field strength. Free space (and nonmagnetic rock) has a permeability of 1.257*10-6 henrys/meter. |
MAGNETIC_SUSCEPTIBILITY
| A measure of the degree to which a substance may be magnetized; the ratio of the magnetization to the magnetic field strength. It is related to the Magnetic Permeability. |
MAJOR_DIMENSION
| Major (normally longer) dimension of an object; the actual type of measurement depends upon the shape of the object. [Used for Drilling Targets, whose shapes could be Elliptical, Circular, Rectangular...] |
MANUFACTURER
| The unique code of the manufacturer, usually a company or organization code. |
MASS
| The property of a body that is a measure of its inertia, that is commonly taken as a measure of the amount of material it contains, that causes a body to have weight in a gravitational field. |
MASS_FRACTION
| The ratio of the mass of a component to the total mass. |
MASS_SPECTRUM_ABUNDANCE
| The abundances of the molecular constituents of a material; may be represented as voltage of a flame ionization detector, amount relative to a standard solution or actual mass quantities. |
MATERIAL_PHASE
| The physical state or phase of a material, such as Liquid or Solid. |
MATERIAL_TYPE
| The type or class of materials both naturally occurring or used in some activity, e.g. Hydrocarbon, Mineral, Rock, Steel, Proppant, etc. |
MATRIX_BLOCK_SKIN
| Matrix to natural fracture skin factor in a naturally fractured system. |
MATRIX_COMPRESSIBILITY
| The compressibility of a homogeneous solid material. |
MATRIX_COMPRESSIONAL_VELOCITY
| Acoustic velocity of a compressional wave in a given material or matrix. |
MATRIX_SHEAR_VELOCITY
| Acoustic velocity of a shear wave in a given material or matrix. |
MATRIX_VOLUME
| The volume of material in a porous system that does not include the volume of the pores. |
MAX_ALLOWABLE_FLOWRATE
| Maximum allowable flowrate for the equipment |
MAX_ALLOWABLE_PRESSURE
| Maximum allowable pressure for the equipment |
MAX_ALLOWABLE_SURFACE_PRESSURE
| Maximum allowable mud surface pressure in annulus (drill-pipe x casing) to be used during well control operations so as not to exceed the FIT/LOT equivalent mud weight. |
MAX_BEND_1_ANGLE
| Maximum first bent angle |
MAX_BEND_2_ANGLE
| Maximum second bent angle |
MAX_CALIBRATED_VALUE
| Maximum value of the range for which the equipment is calibrated. |
MAX_GAS_FLOWRATE
| Maximum gas flowrate |
MAX_GOOSENECK_PRESSURE
| Maximum pressure observed during a Coil Tubing job at the goose neck |
MAX_HOLE_DEVIATION
| Maximum deviation value of the wellbore from the vertical |
MAX_INDEX
| Generalized maximum value of index, typically distance or time. |
MAX_MUD_DENSITY
| Maximum allowable mud density |
MAX_OIL_FLOWRATE
| Maximum oil flowrate |
MAX_OPERATING_PRESSURE
| Maximum pressure which an equipment can withstand without permanent damage at standard temperature. |
MAX_OUTSIDE_DIAMETER
| Maximum outside diameter of an equipment item. |
MAX_TEMPERATURE_REACHED
| Maximum temperature reached by the system, sensor or equipment |
MAX_TENSION
| Maximum tension |
MAX_THICKNESS
| Maximum thickness, as for a reservoir unit. |
MAX_THRESHOLD
| Maximum threshold value. |
MAX_TOOL_SPEED
| Maximum service speed allowed for, or attained by, a logging tool. |
MAX_VOLUME
| The maximum volume not to be exceeded for a container (Tank, Mud Pit) |
MAX_WATER_FLOWRATE
| Maximum water flowrate |
MAX_X
| Maximum X Coordinate for region |
MAX_Y
| Maximum Y Coordinate for region |
MEAN_PARTICLE_DIAMETER
| Average diameter of the particle (e.g. for Gravel pack sand 20/40 mean diameter=0 .025 inc/0.635 mm, 40/60 mean diameter=0.014 inch/0.355mm). |
MEASURE_POINT_OFFSET
| Distance from the measure point to the bottom of an assembly or tool, |
MEASURE_REFERENCE_PLANE_OFFSET
| Distance from the Measure Reference Plane to the bottom of the Equipment (generally the make-up line of the bottom connection). |
MECHANICAL_SKIN
| Mechanical Skin Factor |
MEMORY_GUARD_FLAG
| Flag indicating whether or not a memory guard (memory saving mechanism which decreases the acquisition rate above 80% memory usage) option was selected. |
MEMORY_USAGE
| Ratio of memory used to total memory. |
MIN_ALLOWABLE_FLOWRATE
| Minimum allowble flowrate for the equipment |
MIN_BOREHOLE_DIAMETER
| Minimum borehole diameter |
MIN_CALIBRATED_VALUE
| Minimum value of the range for which the equipment is calibrated. |
MIN_GAS_FLOWRATE
| Minimum gas flowrate |
MIN_IN_SITU_STRESS
| Formation minimum principal stress, the smallest of the 3 components of the diagonal stress tensor (fractures will propagate perpendicular to its direction). Can be defaulted to Frac Gradient x TVD. Can be output from DataFRAC treatment. |
MIN_INDEX
| Generalized minimum value of index, typically distance or time. |
MIN_OIL_FLOWRATE
| Minimum oil flowrate |
MIN_THICKNESS
| Minimum thickness, as for a reservoir unit. Also used for stress calculation with coiled tubing, with data supplied by the manufacturer |
MIN_THRESHOLD
| Minimum threshold value. |
MIN_WATER_FLOWRATE
| Minimum water flowrate |
MIN_X
| Minimum X Coordinate for region |
MIN_Y
| Minimum Y Coordinate for region |
MINERAL_CLASS
| The classification of a mineral. |
MINERAL_CODE
| Catalog-controlled code of a mineral. |
MINERAL_CONDUCTIVITY
| Mineral Conductivity |
MINERAL_DENSITY
| The density of a mineral. |
MINERAL_GROUP
| The group to which a mineral belongs. |
MINERAL_HARDNESS
| The hardness of a rock sample expressed in units of the MOH reference standard. |
MINERAL_RESISTIVITY
| Mineral Resistivity |
MINOR_DIMENSION
| Minor (normally shorter) dimension of an object; the actual type of measurement depends upon the shape of the object. [Used for Drilling Targets, whose shapes could be Elliptical, Circular, Rectangular...] |
MIXING_ORDER
| Order in which the materials are added together. This order matters e.g. the acid is poured into the water and not the contrary, the water to the flour ... |
MOBILITY
| The measure of the ease with which a fluid can be moved in a specific medium (i.e. rock). The ratio of the effective permeability and the viscosity of the fluid. |
MOBILITY_RATIO
| Radially composite system mobility ratio [inner/outer bank] |
MODEL_INPUT_MEASUREMENT
| Input measurement (Unit Quantity) for a calibration or computation model |
MODEL_INPUT_UNIT
| Input unit for a calibration or computation model |
MODEL_NAME
| Name of a model or version of some entity or algorithm; for equipment, it may coincide with the trade name. |
MODEL_OUTPUT_MEASUREMENT
| Output Measurement (Unit Quantity) for a calibration or computation model |
MODEL_OUTPUT_UNIT
| Output unit for a calibration or computation model |
MODEL_SET_SORT_INDEX
| Sorting indexes for Model Set Editor display |
MOLAR_CONCENTRATION
| The ratio of the number of moles of a material in a sample to the volume of the sample. |
MOLE_FRACTION
| The ratio of the number of moles of a component to the total number of moles present. |
MOLECULAR_WEIGHT
| Ratio of the mass of a molecule of a substance to 1/12 of the mass of a Carbon12 atom; calculated as the sum of the atomic weights of the constituent atoms. |
MOTOR_SPEED
| The rotational speed of a motor. |
MUD_BACKGROUND_GAS_FACTOR
| Drill fluid background gas content as output by the chromatograph in circulating conditions. |
MUD_CHLORIDE_CONCENTRATION
| Concentration of chlorides in mud. |
MUD_CONNECTION_GAS_FACTOR
| Drill fluid gas content spike as output by the chromatograph after stopping circulation in order to make or break connections. |
MUD_DENSITY
| The density of mud, or drilling fluid, used during drilling operations. |
MUD_FILTRATE_RESISTIVITY
| Resistivity of Mud Filtrate |
MUD_FLOWRATE
| The rate at which mud, or drilling fluid, is being pumped into, or output from, a borehole or some storage unit. |
MUD_PRESSURE_GRADIENT
| The Mud density expressed in pressure gradient. Usually used to compare the mud induced pressure with the pore and frac pressure. |
MUD_RESISTIVITY
| Resistivity of Drilling Fluid, also known as mud. |
MUD_TEMPERATURE
| The temperature of a mud or drilling fluid (sample) under certain conditions. |
MUD_TRIP_GAS_FACTOR
| Bottom hole drill fluid gas content spike as output by the chromatograph after stopping circulation for a significant time interval such as when tripping into the hole. |
MULTI_INTERSECTION_FLAG
| Flag to indicate that two geometric objects have more than one intersection; for example a wellbore may intersect a geologic feature more than once, due to the geometry of the wellbore path or that of the geologic feature. |
N2_CONCENTRATION
| Concentration of Nitrogen |
N2_FOAM_QUALITY
| Ratio volume of N2 over foam volume . Indicator of the quality of a foam generated with N2 for well treatment. Below 50% the foam is not stable, above 95% the foam changes to a mist. |
NAMING_SYSTEM
| Name of the system which controls the valid or legal names of entities. For example, there are numerous system for naming wells: API 12 digit, CPA, Tobin |
NEGATIVE_SLOPE
| Negative slope value. |
NEGATIVE_THRESHOLD
| Negative threshold value. |
NEIGHBORHOOD
| A topological property indicating whether a spatial object lies to the "left" or to the "right" of a neighboring object whose orientation sense has been specified. |
NET_FRACTURING_PRESSURE
| Hydraulic pressure exerted on a formation during a fracturing job (fracture pressure) minus Closure Pressure. |
NEWTONIAN_VISCOSITY
| Slope of Shear Stress/Shear Rate curve for the Newtonian rheology model (Shear Stress proportional to Shear Rate) |
NODE_LOCKED_FLAG
| A Y/N flag indicating whether a particular Node is locked and cannot be displaced. |
NOM_DIAMETER
| Nominal (approximate, for naming purposes only) diameter of an object. |
NOM_FLOWRATE
| Nominal Flow Rate |
NOM_HYDRAULIC_POWER
| Hydraulic (Flowrate x pressure) power that the equipment can sustain over a long period of time, as opposed to maximum working pressure which is the peak maximum |
NOM_OUTSIDE_DIAMETER
| Nominal (approximate, for naming purposes only) outside diameter of an equipment item. |
NOM_PRESSURE_LOSS
| The nominal pressure loss in a piece of equipment, such as a Drill_Motor or an MWD_Tool. |
NOM_THICKNESS
| Nominal thickness |
NOMENCLATURE_CODE
| Code built by compounding different codes e.g. drill fluid code built on product-packaging type: 103481052 means Barite API(103481) in 50kg sack (052). |
NON_DARCY_FLOW_COEFFICIENT
| Non-Darcy (turbulence) flow coefficient ("D") |
NON_MAGNETIC_FLAG
| A flag indicating whether the equipment is made with non magnetic material. |
NORTHING_LATITUDE
| Latitude of Northing reference point. |
NORTHING_LONGITUDE
| Longitude of Northing reference point. |
NOZZLE_COUNT
| The number of nozzles in an equipment item, such as a drill bit. |
NOZZLE_SIZE
| Diameter of the nozzle(s) used in an equipment item, such as a drill bit |
OBJECT_IDENTIFIER
| Identifier of the seimic object within the Foreign System |
OCCURRENCE
| Description of where an object, material or phenomenon may occur or be found. |
OCCURRENCE_ORDER
| The order of occurrence of a particular item. |
OCCURRENCE_PROBABILITY
| The probability that an item (element, mineral, ..) occur within a particular environment under certain conditions. |
OFFSHORE_BLOCK_NUMBER
| Identification of the Offshore block where the well is located |
OIL_BRINE_RATIO
| Ratio of oil volume to brine volume for a fluid, such as an oil based mud |
OIL_BUBBLE_FLOW_VELOCITY
| Oil Bubble Velocity |
OIL_COMPRESSIBILITY
| The compressibility of oil at a given pressure and temperature. |
OIL_COMPRESSIBILITY_CORRELATION
| Name of the correlation model (often the author name) used to compute oil compressibility (e.g. Calhoun, Vasquez and Beggs) |
OIL_CONCENTRATION
| Oil Concentration per fluid Volume |
OIL_DENSITY
| The density of oil. |
OIL_FLOW_VELOCITY
| Flow velocity of oil component of fluid. |
OIL_FLOWRATE
| Rate of flow of oil |
OIL_FORMATION_VOLUME_FACTOR
| For a sample of oil and its residual solution gas at surface, the ratio of the volume at specified (typically, reservoir) conditions to the volume at surface (stock tank) conditions. Normally abbreviated Bo; typical range 1.1 - 2. |
OIL_FORMATION_VOLUME_FACTOR_CORRELATION
| Name of the correlation model (often the author name) used to compute oil formation volume factor (Vasquez_Beggs, Glaso, Standing) |
OIL_FRACTION
| Volumetric fraction of oil in the total fluid |
OIL_GRAVITY
| The ratio of the density of the produced or reservoir oil to that of pure water at atmospheric conditions. See also API_Gravity |
OIL_SAMPLING_POINT
| The location where oil samples are taken on the separator |
OIL_SATURATION
| The extent to which the pore space in a formation contains oil. |
OIL_TEMPERATURE
| The temperature of oil under certain conditions. |
OIL_VISCOSITY
| The viscosity of oil at specific temperature and pressure conditions. |
OIL_VISCOSITY_CORRELATION
| Model used to compute oil viscosity |
OIL_WATER_CONTACT_DEPTH
| The depth at which oil water contact has been recognized in a Reservoir Unit. |
OIL_WATER_RATIO
| Ratio of oil volume to water volume for a fluid, such as an oil based mud |
ONE_HOUR_PRESSURE
| Pressure measured 1 hour after start of test. |
OPERATING_MODE
| Operating mode of an equipment |
OPERATING_SYSTEM_NAME
| Name of computer Operating System, e.g. UNIX, VMS, Windows NT. |
OPERATING_SYSTEM_VERSION
| Version of computer Operating System |
OPERATING_TIME
| Period of time which is spent operating, either for a single operation or for a series of operations. Complement of Idle_Time. |
OPTIONAL_BLADE_HEIGHT
| Optional height of blade at gauge from the body of the equipment, such as a stabilizer (extended Andergauge); used as a supplement to Blade_Height. |
ORDERED_FLAG
| Flag to indicate whether the members of a set have been ordered. |
ORIFICE_METER_GAS_TEMPERATURE
| Temperature of gas at orifice meter line when a sample is taken |
ORIFICE_PLATE_DIAMETER
| Diameter of orifice plate in gas metering system when a sample is taken |
ORIGIN_EASTING
| The easting of the point of origin of an orthogonal grid constructed on a map projection. Often, this value is defined to be a positive number to avoid negative coordinates. Sometimes called "false easting". |
ORIGIN_LATITUDE
| The latitude of the point of origin of an orthogonal grid constructed on a map projection. Frequently this is a projection standard parallel, but can be any defined latitude. |
ORIGIN_LONGITUDE
| The longitude of the point of origin of an orthogonal grid constructed on a map projection. Frequently this is the central meridian, but can be any defined longitude |
ORIGIN_NORTHING
| The northing of the point of origin of an orthogonal grid constructed on a map projection. Often, this value is defined to be a positive number to avoid negative coordinates. Sometimes called "false northing". |
ORIGIN_X
| X component of the location of the origin of a Local Coordinate System, measured with respect to the origin of the "from" coordinate system. Units, if any, are those of the "from" system. |
ORIGIN_Y
| Y component of the location of the origin of a Local Coordinate System, measured with respect to the origin of the "from" coordinate system. Units, if any, are those of the "from" system. |
ORIGIN_Z
| Z component of the location of the origin of a Local Coordinate System, measured with respect to the origin of the "from" coordinate system. Units, if any, are those of the "from" system. |
ORIGINAL_EXPIRY_DATE
| The original date that the contract was to terminate. If the contract is extended, this date does not change. |
OUTER_BOUNDARY_CONDITION_TYPE
| Description of the outer boundary condition for a well test model. |
OUTER_CONTINENTAL_SHELF_NAME
| Name of the submerged land area called the Outer Continental Shelf |
OUTER_PIPE_INSIDE_DIAMETER
| Inside diameter of a pipe in external position within an annulus |
OUTSIDE_DIAMETER
| Outside diameter of an entity, such as an item of drillstring equipment |
OVERBURDEN_PRESSURE
| The pressure exerted on the matrix of a porous media by the weight of overlying strata. |
PACKAGE_SIZE
| Quantity of material contained in each package. Unit depends upon the type of material and packaging. |
PACKAGING_TYPE
| Type of Packaging or container used for products, such as Drum, Sack, Bulk, Pieces, Palets |
PACKER_DEPTH
| Depth at which the packer is set. |
PACKER_INSIDE_DIAMETER
| Packer internal diameter (Casing_Tubing Packer) |
PACKER_MOTION_TYPE
| Internal tubular (e.g. tubing) motion allowed by the packer during an increase in pressure. Choices: Free (Packer does not restrain motion), Limited (tubular is free to shorten but not lengthen) and No Motion. |
PACKER_TYPE
| Type of packer; supplier type like Dowell Model 21. No simple type description available but the supplier identification. |
PARTIAL_COMPLETION_MODEL
| Model used to compute the Partial Completion apparent skin effect |
PARTIAL_COMPLETION_SKIN
| The skin effect caused by flow convergence due to not completing the entire flowing thickness. Does not include the skin due to the completion itself. |
PATTERN
| Name of a pattern, as for graphics. |
PATTERN_LENGTH
| The length of a pattern, usually pertaining to a dip pattern or a geological feature. The length is usually an interval length like depth. |
PERFORATION_CHARGE_TYPE
| Type of explosive charge used in a perforating gun. |
PERFORATION_COUNT
| Total number of perforations over the perforated interval |
PERFORATION_DIAMETER
| The diameter of the perforation entrance hole. Often called Entrance Hole Diameter. |
PERFORATION_GUN_PHASE
| Phasing of the perforating gun for the given perforated interval. Standard arrangements include Inline (0 deg), Spiral (45, 60, 90, 120, 180 deg), Tangential(90-270 deg). |
PERFORATION_GUN_POSITION
| The position of the perforating gun relative to the tubing/casing in the borehole. Options include: Positioned (usu. Through-Tubing guns), Not Positioned (usu. Casing guns), Centralized. |
PERFORATION_GUN_STANDOFF
| Standoff of Perforation Gun |
PERFORATION_GUN_TYPE
| The type of perforating gun used to shoot the given interval of the tubing (or casing) in the borehole. Examples are: 3-3/8" 6 SPF, 3-3/8" HJ HI-TEMP, 4" HJ II, etc. |
PERFORATION_LENGTH
| Length of the portion of the perforation which extends from the casing beyond the cement sheath and into the reservoir. It includes the casing thickness and the cement sheath thickness. |
PERFORATION_PRESSURE_CONDITION
| Pressure condition in the well at the time of perforating; may be Underbalanced (pressure in formation higher than in borehole) or Overbalanced (pressure in borehole higher than in formation. |
PERFORATION_SHOT_DENSITY
| The perforation density; i.e., the number of shots per unit length. |
PERFORATION_STATUS
| Not perforated, perforated, plugged or squeezed |
PERFORATION_TYPE
| The method used to open the production in the borehole. Examples are: Bullet, Jet, Combination, Open Hole, etc. |
PERMEABILITY
| A property of rock (formation) denoting its ability to pass fluids through its interconnected pores. |
PERMEABILITY_AXIAL_PATH
| Permeability measured along the length of a core cylinder. |
PERMEABILITY_THICKNESS
| The product of permeability and thickness of the body acting as a conduit. |
PERMEABILITY_THICKNESS_RATIO
| Permeability-thickness ratio [= kh(1) / kh(1+2)] for a vertical interference test |
PERMEABILITY_TRANSVERSE_PATH
| Permeability measured in the plane transverse to the length of the core cylinder. This may be represented as a single measurement in the flow plane or as a two component permeability represented as a measurement along an arbitrary diameter and another along an orthogonal path in the same plane. |
PERMITTIVITY
| The property of a material that enables it to store electrical charge, typically measured in farad/m. Free space has a Permittivity of 8.854E-12 farad/m. |
PERSONNEL_COUNT
| Headcount of personnel satisfying role of Personnel_Role; these may be implemented as lists. |
PERSONNEL_ON_BOARD
| Count of number of people on board the vessel or structure. |
PERSONNEL_ROLE
| Role of the personnel counted in Personnel_Count; these may be implemented as lists. |
PERSPECTIVE_HEIGHT
| Height of the point of perspective; used in general perspective map projections. |
PH
| An indicator of the degree of acidity or basicity of an aqueous solution. A value of 7 denotes a neutral fluid, lower values correspond to acidic fluids and higher values to basic fluids |
PHONE_NUMBER
| Telephone number |
PICKUP_FRICTION_COEFFICIENT
| Friction coefficient between a string and the borehole when pulling out of the hole |
PICKUP_HOOK_LOAD
| Driller estimate of the average pickup hook load (pickup weight) over the reporting period. |
PICKUP_REEL_BACK_TENSION
| Amount of tension kept on the coiled tubing between the gooseneck and the reel when pulling out of the hole |
PLANE_ANGLE_UNIT
| Unit for Plane Angle data. |
PLANNED_DEPTH
| The planned measured depth at the end of the reporting period, as described on the driller depth log of the planned borehole |
PLASTIC_VISCOSITY
| Apparent viscosity of the Bingham Plastic model : Slope of the curve shear stress vs. shear rate (rheogram). Model equation is Shear_Stress= Yield_Stress + Plastic_Viscosity times Shear_Rate. |
PLAY_TYPE
| A type or code assigned to a lease. Play codes can be internal to company and are usually based upon geographic boundaries or geologic trends. |
PLUG_BACK_TOTAL_DEPTH
| Measured Depth of the current bottom of the borehole. It is the physical bottom of the borehole which is plugged either by a cement or by a mechanical plug. The P.B.T.D. can changes in time. It is smaller than the total depth drilled. |
PLUNGER_COUNT
| Number of plungers e.g. 3 for a triplex pump. |
POISSON_RATIO
| Ratio of the transverse contraction of a body to its longitudinal extension when stretched. Typical values in minerals are from 0.15 to 0.3 (Carbonates:0.15, Sandstones:0.2, Shales:0.25). |
POLARITY_REVERSAL_FLAG
| When set, apply reverse polarity. |
POLYOL_CONCENTRATION
| Polyol Concentration per fluid Volume (Polyol are glycol-glycerol alcohol derivatives) |
POND_DEPTH
| For a centrifuge, Position of overflow Port relative to Inner Bowl Wall |
POPULATION
| A count of the number of persons or objects. |
PORE_PRESSURE
| The pressure of the fluid contained in the pore volume. |
PORE_THROAT_DIAMETER
| The measured or effective diameter of the aperture which connects pores or void spaces within a rock matrix. |
PORE_VOLUME
| The volume within a geologic volume that describes the connected void space within the matrix of rock. |
PORE_VOLUME_COMPRESSIBILITY
| The relative change in the pore volume of a rock under conditions of changing confining pressure. |
POROSITY
| Pore volume per unit gross volume. Porosity is determined from cores, sonic or density logs. |
POROSITY_LENGTH_RATIO
| The ratio of the sum of layer porosity thicknesses to total system porosity thicknesses for a layered porous media. |
POROSITY_TYPE
| The porosity type usually of a core sample or in either a carbonate or clastic rock formation (e.g. Intercrystal, Breccia, Vuggy, etc.), |
PORT_COUNT
| Number of ports, such as in a Coiled Tubing BHA |
PORT_DIAMETER
| Diameter of each individual port |
POSITIVE_SLOPE
| Positive slope value. |
POSITIVE_THRESHOLD
| Positive threshold value. |
POWER
| The time rate at which work is done or energy emitted or transferred. |
POWER_SUPPLY_START_TIME
| Actual date and time at which the recorder was powered on. |
PRECISION
| The repeatability of an instrument measured by the mean deviation of a set of measurements from the average value. |
PREFERRED_FLAG
| An indicator which shows that a particular item is preferred over another, normally as a result of some interpretation or validation process. |
PRESCALE_OFFSET
| Special Offset value used in certain calibrations It is not part of the Calibration_Coefficient list. |
PRESERVATION_METHOD
| Method by which an item or sample, such as a core sample, has been preserved. |
PRESSURE
| The force or thrust exerted over a surface divided by its area; e.g., hydrostatic, flow, pump, etc. May be gauge or absolute. |
PRESSURE_DROP_CORRELATION_TYPE
| Pressure drop correlation (e.g., Dun-Ros, Cullender, etc. ) |
PRESSURE_GRADIENT
| The change in pressure per unit length. |
PRESSURE_LOSS
| The difference between input and output pressure, usually due to friction. |
PRESSURE_POINT_SETUP
| Identifies the location of the fluid whose pressure is being recorded. |
PRESSURE_POINT_SETUP_CODE
| Encoding of the pressure point position setup of a Testing Tool by concatenation of the PRESSURE_POINT_SETUP enumeration separated by space, e.g., "Tubing-Above-Valve Annulus Empty" |
PRESSURE_RATE
| A measure of the rate at which pressure varies per time; e.g., slider pressure correction. |
PRESSURE_SENSOR_DRIFT
| Pressure difference over time in the gauge output with constant input conditions |
PRESSURE_SENSOR_NOISE
| Random changes in pressure sensor response. |
PRESSURE_SENSOR_RESOLUTION
| The minimum significant pressure change that can be detected above the noise. This is measured as the standard deviation of the differences between two successive measurements. |
PRIME_MERIDIAN_GREENWICH_OFFSET
| Longitude of the prime meridian referenced from the meridian through Greenwich. Postive denotes east of Greenwich. Example: PARIS PANTHEON meridian in France is at longitude 2.337229 degrees. |
PRIME_MERIDIAN_NAME
| Name of the meridian from which longitudes are referenced. Normally the meridian through Greenwich is defined as the prime meridian. |
PROCESSING_OPTION
| An indicator of which of two or more options has been selected for data processing. |
PRODUCED_FLUID_COMPRESSIBILITY
| Compressibility of the Total Produced Fluid for the Hydraulic Unit |
PRODUCING_GAS_LIQUID_RATIO
| The ratio of produced gas to produced liquid (oil + water) at the wellhead |
PRODUCING_THICKNESS
| Total flowing thickness along the Borehole ("Hp") |
PRODUCING_WATER_CUT
| Producing Water Cut from the Hydraulic Unit |
PRODUCTION_HISTORY_FLAG
| Flag indicating whether or not this Flow Period is part of the Production History; i.e., set for Production History, not set for Test History |
PRODUCTION_HISTORY_REFERENCE_TIME
| Reference Date and Time for Production History |
PRODUCTION_HISTORY_TYPE
| Type of production/Injection data set : Previous_Flow_History (Production), Injection, Previous_Flow_History (Production), Simulated_Behavior (Test), Actual_Field(Flow) |
PRODUCTIVE_FLAG
| Indicates whether object or activity is productive. An activity is considered productive if it brings the operation closer to achieving the objective. |
PRODUCTIVITY_INDEX
| Ratio of flow rate to pressure drop. For oil wells, PI is normally expressed in barrels per day per psi decline in bottomhole flowing pressure. |
PRODUCTIVITY_RATIO
| Productivity ratio (actual productivity index divided by ideal (zero skin) productivity index) |
PROFILE_CONDUCTIVITY
| Conductivity profile measurement, used primarily for pattern recognition; may or may not be calibrated. |
PROFILE_RESISTIVITY
| Resistivity profile measurement, used primarily for pattern recognition; may or may not be calibrated. |
PROJECTION_AZIMUTH
| Azimuth of positive y-axis of projection. |
PROJECTION_SCALE_FACTOR
| Scale Factor which is used as a defining parameter for a projection, typically taken along the Central Meridian or along one of the major parallels |
PROJECTION_SCALE_REDUCTION
| A number by which the scale along a designated meridian, great circle, or parallel is reduced or enlarged during the projection process to reduce the scale error elsewhere in the projection. |
PROPERTY_CODE
| Catalog code of SDM Property |
PROPOSAL_NUMBER
| Customer proposal number |
PROPPANT_AREAL_DISTRIBUTION
| Mass of proppant per fracture area (hydraulic fracturing) |
PROPPANT_PERMEABILITY_FACTOR
| Fraction of proppant permeability retained in the in-situ fracture condition, and due to mechanical damage excluding any damage due to fluid residue. Has the same effect than Fluid_Permeability_Factor. |
PROPPED_WIDTH
| Width of the proppant laden volume within an hydraulic fracture (hydraulic fracturing). Smaller during fracture propagation than the fracture width. |
PUMP_LINER_DIAMETER
| Diameter of the pump entry line |
QHSE_REPORT_COUNT
| Number of QHSE reports issued for the reporting period |
RADIAL_LENGTH
| Length measured in a radial direction. |
RADIOACTIVITY
| The measure of intensity of radiation from a material relative to a standard level of intensity. |
RAMPING_DURATION
| Time duration of the ramp tapering the time window |
RAMPING_METHOD
| Method to ramp (tapering) the time window, e.g., Hamming, Hanning... |
RANK
| Integer denoting the order of an element in a collection, such as the rank of a Layer participatng in a Sequence or Stratigraphic Column. |
RAT_HOLE_BOTTOM_DEPTH
| Bottom depth of the section of the borehole running from the tester valve to the effective bottom of the well |
RAT_HOLE_DIAMETER
| Diameter of the section of the borehole running from the tester valve to the effective bottom of the well |
RAT_HOLE_VOLUME
| Available volume of fluids below testing valve. The rat hole is the section of the borehole running from the tester valve to the effective bottom of the well. The calculation of this volume is not straight-forward as the rat hole is not generally empty. |
RAYLEIGH_VELOCITY
| The velocity of a Rayleigh wave (type of seismic wave propagated along the free surface of a semi-infinite medium. |
RECORDER_DELAY_TIME
| Delay time between instrument power-on time and when recording begins |
RECOVERY_FACTOR
| Recovery factor of reservoir fluids expressed as the ratio of standard volumes (stock tank barrels, etc.) recovered to pore volume. |
RECOVERY_RATIO
| Ratio of amount of sample or material recovered to total amount recoverable. |
RECTANGLE_LENGTH
| The length distance between two parallel boundaries in a rectangular reservoir model. |
RECTANGLE_WIDTH
| The width distance between two parallel boundaries in a rectangular reservoir model. |
REDUCED_PRESSURE
| The pressure of a fluid divided by the critical pressure of the fluid. |
REDUCED_TEMPERATURE
| The temperature of a fluid divided by the critical temperature of the fluid. |
REDUCED_VOLUME
| The volume of a fluid divided by the critical volume of the fluid. |
REEL_CORE_DIAMETER
| Drum core diameter, such as for a coiled tubing reel |
REEL_CORE_WIDTH
| Width between flanges of the drum core, such as for a coiled tubing reel |
REFERENCE_DEPTH
| Depth value used as a reference for other data |
REFERENCE_PRESSURE
| Reference Pressure, as for a PVT computation |
REFERENCE_SACK_MASS
| Sack "weight" (mass) to which unit by sack refers e.g. lbs/sack |
REFERENCE_TIME
| Reference Date and Time For Elapsed Time |
REFLECTION_COEFFICIENT_THRESHOLD
| Minimum reflection coefficient when processing the multiple reflections |
REFRACTIVE_INDEX
| The ratio of the velocity of light in a vacuum to that in the medium in question. |
RELATED_SAMPLE_TYPE
| Type of related samples taken in the recombination set |
RELATIVE_DIP_ANGLE
| Magnitude of formation dip relative to structural dip; computed by subtracting structural dip from true dip (dip removal). |
RELATIVE_DIP_AZIMUTH
| Azimuth of formation dip relative to structural dip; computed by subtracting structural dip from true dip (dip removal). |
RELATIVE_PERMEABILITY
| The ratio of effective permeability divided by the absolute permeability; e.g. the relative permeability of a rock to that of any of its contained fluids. |
RELATIVE_PERMEABILITY_GAS
| Ratio of effective gas permeability to absolute permeability. Usually abbreviated as Kg |
RELATIVE_PERMEABILITY_OIL
| Ratio of effective oil permeability to absolute permeability. Usually abbreviated as Ko. |
RELATIVE_PERMEABILITY_WATER
| Ratio of effective water permeability to absolute permeability. Usually abbreviated as Kw. |
REMAINING_LIFE
| Remaining relative life predicted by the CoilLIFE model expressed as a percentage |
REMAINING_VOLUME
| Volume of material which remains (e.g. remaining volume to be pumped) |
REMOTE_FILE
| Name of file on remote host |
RESERVOIR_FLUID_COMPRESSIBILITY
| Compressibility of the reservoir fluid |
RESERVOIR_FLUID_DENSITY
| The density of the reservoir fluid i.e. the mixture oil, gas and water. |
RESERVOIR_FLUID_VISCOSITY
| The viscosity of reservoir fluid at specific temperature and pressure conditions. |
RESIDUAL_HYDROCARBON_SATURATION
| The fraction or percentage of hydrocarbons remaining following the production of hydrocarbons from the reservoir. |
RESIDUAL_OIL_SATURATION
| The fraction or percentage of oil remaining following the liberation of gases from the reservoir. |
RESISTANCE
| The resistance of a medium to the flow of electric current; the real component of the complex quantity Impedance. |
RESISTIVITY
| The property of a material which resists the flow of electrical current. The ratio of electric-field intensity to current density. The reciprocal of conductivity. |
RESISTIVITY_INDEX
| The functional relationship between the relative volume of an electrically conductive fluid in a material and the electrical resistivity of the material. |
RESPONSE_EQUATION
| Sensor response equation |
REYNOLDS_NUMBER
| The ratio of inertial force to viscous force for viscous fluid flow. |
RHEOLOGY_MODEL
| Mathematical model describing how the shear stress relates to the shear rate i.e. how a fluid flows and is deformed in response to applied stresses. Most popular model are Newtonian, Bingham Plastic and Power-Law |
RHEOMETER_DEVIATION
| Vector of deviation angles of the rheometer related to the vector of given Angular Velocity |
RIG_HEADING
| Azimuth of the direction to which the rig is facing. |
RIG_HEAVE
| Maximum amplitude of the vertical motion of the rig |
RIG_PITCH_ANGLE
| Measure of the fore-aft rotational movement of the rig due the combined effects of wind and waves. |
RIG_ROLL_ANGLE
| Measure of the side-to-side rotational movement of the rig due the combined effects of wind and waves; measured as the angle from vertical. |
RIGHT_HIDDEN_WIDTH
| For core images, the width of the core which is hidden on the right side of the image (by core box, for example). |
RIGHTS_TYPE
| Type of lease rights |
RISER_ANGLE
| Angle of the marine riser with the vertical. |
RISER_INTERNAL_DIAMETER
| The internal diameter of the marine riser. |
RISER_TENSION
| Tension of the marine riser |
ROCK_CLASS
| Classification of rocks into Chemical, Volcaniclastic, etc. |
ROCK_CODE
| Catalog code of a rock type (e.g. Limestone) |
ROCK_COMPRESSIBILITY
| Compressibility of the rock matrix. |
ROCK_COMPRESSIBILITY_CORRELATION
| Rock Compressibility Correlation (Sandstone, Carbonate) |
ROCK_COMPRESSIBILITY_DEPTH
| Measured depth for which Rock Compressibility is stated. |
ROCK_EMBEDMENT_STRENGTH
| Force required to push a 1/8 inch diameter sphere 1/16 in into the rock. (Lab test). Value ranges from 5 to 20 kpsi for chalk, 40 to 100 kpsi for sandstones, 50 to 200 for Dolomites. |
ROCK_GENESIS
| Classification of rocks by genetic origin, e.g. Sedimentary, Igneous, etc. |
ROCK_SOLUBILITY_IN_ACID
| Amount of rock, normally expressed as a percentage by weight soluble in a given acid |
ROCK_SOLUBILITY_IN_HCL
| Amount of rock, normally expressed as a percentage by weight soluble in HCl |
ROCK_SOLUBILITY_IN_RMA
| Amount of rock, normally expressed as a percentage by weight soluble in Mud Acid (standard mixture of 12 % HCl and 3% HF) |
ROCK_SUBCLASS
| Classification of rocks into Carbonate, Evaporite, etc. Commonly called Lithology. |
ROTARY_SPEED
| The rotational speed of the Rotary Table; |
ROTATION
| The angular displacement of a rotating body or figure. |
ROTATION_1
| Value of first rotation, as indicated by the first token in ROTATION_SENSE, used in transforming a coordinate system into a new (local) coordinate system. |
ROTATION_2
| Value of second rotation, as indicated by the second token in ROTATION_SENSE, used in transforming a coordinate system into a new (local) coordinate system. |
ROTATION_3
| Value of third rotation, as indicated by the third token in ROTATION_SENSE, used in transforming a coordinate system into a new (local) coordinate system. |
ROTATION_GRADIENT
| A measure of the rate at which an object is rotating per unit length; e.g., flowmeter rotation per length of pipe. |
ROTATION_SENSE
| Right or Left Rotation Sense |
ROTOR_NUMBER
| Number of the rotor. (For a cylindrical rheometer, each number corresponds to a different size. Standard Rotor is #1) |
ROUNDNESS
| A measure of the degree of how round an object is, such as a contour on a Surface. |
ROYALTY
| Royalty received by lessor |
RUGOSITY
| A measure of surface irregularity, such as of the borehole wall. |
RUNNING_LENGTH
| Sum of all the displacements in one direction (generally downhole) made by a downhole equipment. Used as fatigue indicator or charged item in coil tubing operations. |
SAFETY_DRILL_TYPE
| Type of Quality, Health, Safety, and Environmental safety drill such as Fire Drill, Abandon Ship Drill, Spill Control Drill. |
SALE_DATE
| Date of lease purchase |
SALE_NUMBER
| Sale number of lease purchase |
SALINITY
| Total salts in solution (Na, K, Cl, So4, ..). |
SAMPLE_COUNT
| Number of samples. |
SAMPLE_GAS_OIL_RATIO
| Ratio of gas flowrate to oil flowrate when a sample is taken |
SAMPLE_NUMBER
| The number assigned to the sample by client |
SAMPLE_TYPE
| Nature of the sample e.g. oil or gas |
SAMPLE_WATER_OIL_RATIO
| Water oil ratio when a sample is taken |
SAMPLING_BOTTLE_NUMBER
| Sample bottle number |
SAMPLING_END_TIME
| End date/time of surface sampling |
SAMPLING_PERIOD
| Time interval between the acquisition of two sequential data samples. |
SAMPLING_START_TIME
| Starting date/time of surface sampling |
SAND_CONCENTRATION
| Sand content per Mud Volume, API RP13B, Section 5, Sand |
SATURATION_EXPONENT
| The exponent of the Saturation term in the Archie saturation equation. Abbreviated "n". |
SCALE_FACTOR_LATITUDE
| Latitude at which scale factor is exact. |
SCALE_FACTOR_LONGITUDE
| Longitude at which scale factor is exact. |
SCALE_X
| Scale factor in X dimension |
SCALE_Y
| Scale factor in Y dimension |
SCALE_Z
| Scale factor in Z dimension |
SCAN_TYPE
| Describes the way in which a subject is scanned to take data samples or to generate an image. |
SCREEN_ANGLE
| Angle of the screen, with respect to horizontal |
SCREEN_ARRANGEMENT
| Position of the screens, such as in a shale shaker. |
SCREEN_COUNT
| Number of Screens |
SCREEN_MESH_SIZE
| Size of the mesh (usually expressed in inches) use to filter particles. |
SCREEN_MOTION
| An indicator of the current state of the movement induced by the vibrator(s) of a shale shaker screen |
SCREEN_TENSION_TYPE
| Type of screen tension (deck tensioned or factory pretensioned) |
SECTION_LENGTH
| Length of one section, such as the nominal length of one section of a streamer. |
SECTION_SUFFIX
| A subsection single letter suffix designation a part of a Section, as used in California, USA |
SEDIMENTARY_CHANNEL_TYPE
| The type of the sedimentary environment that created the channel, e.g. Submarine, Stream, Tidal, etc. |
SEDIMENTARY_FEATURE_TYPE
| The type of the sedimentary feature associated with a subsurface or surface Earth region. |
SEDIMENTARY_STRUCTURE_TYPE
| The type of sedimentary structure associated with an interval. |
SEISMIC_OBJECT_TYPE
| Type of seismic data object: data or survey geometry, 2 or 3D |
SENSOR_CODE
| Sensor code |
SENSOR_END_TIME
| End time (tend) as observed by downhole or surface sensors, measured as elapsed time since the Time Reference. |
SENSOR_NUMBER
| Sensor number |
SENSOR_STANDOFF
| The distance from a sensor to the medium being investigated, such as from a logging sonde to the wall of the borehole. |
SENSOR_START_TIME
| Start time (t0) as observed by downhole or surface sensors, measured as elapsed time since the Time Reference. |
SEPARATOR_LINE
| Type of separator line: e.g. oil outlet, gas outlet, water outlet or inlet |
SEPARATOR_OIL_FLOWRATE
| Oil flowrate at separator conditions when a sample is taken |
SEPARATOR_PRESSURE
| Pressure of the separator when a sample is taken |
SEPARATOR_TEMPERATURE
| Temperature of the separator when a sample is taken |
SEQUENCE_BOUNDARY_TYPE
| The type of a Sequence Boundary in the Earth subsurface, e.g. Toplap, Concordance, Baselap, etc. |
SEQUENCE_LOWER_LIMIT_TYPE
| The type of surface situated at the base of a sequence. |
SEQUENCE_NUMBER
| Number used to identify or index an element in a sequence. |
SEQUENCE_ORDER
| The order of a sequence in the depositional process. |
SEQUENCE_TREND
| The type of vertical evolution recognized in a particular sequence e.g. fining up. |
SEQUENCE_UPPER_LIMIT_TYPE
| The type of limit bounding the top of a sequence. |
SERVICE_DATE
| The date a particular equipment is placed in service. May also be used to indicate when a service started. |
SESSION_DURATION
| Elapsed time from the start to the finish of a recording or processing session. |
SETTING_FORCE
| Load which must be applied to set compression type packer. Typical value : 10,000 lbf |
SETTING_MODE
| Mode for setting a plug or packer: by compression or inflation |
SETTING_TOOL
| Generic type of plug or packer setting tool: Drill-Pipe or Wireline |
SHAPE_FACTOR
| A geometrical factor (Ca) characteristic of the reservoir areal drainage shape (e.g. circle or square) and the well location (e.g. centered). |
SHEAR_MODULUS
| The stress-strain ratio for simple shear. Mu = (Delta F / A) / (Delta L / L), where Delta F, L denotes the change in the shearing (tangential) Force and Length, and A stands for the cross-sectional area. |
SHEAR_VELOCITY
| The velocity of a shear wave (Vs); a shear wave is a type of seismic wave in which the particle motion is perpendicular to the direction of propagation; also called S-wave or secondary wave. |
SHOW_DESCRIPTION
| A textual description of the hydrocarbon shows in a rock sample. |
SHOW_DISTRIBUTION
| A textual description of the distribution of hydrocarbon indicators on a rock surface; e.g. solid, spotty, streaky. |
SHOW_FLOW_RATE
| A textual description of the rate at which fluid emerges from the rock sample. Example keywords include: dead oil, live show, streaming or bleeding. |
SHOW_QUALITY
| A qualitative indicator of the intensity of the fluid show. |
SHOW_TYPE
| The type of hydrocarbon show from a Well or from a Sample (Core, Cuttings, etc.): e.g. Gas, Oil, etc. |
SHRINKAGE_FACTOR
| A measure of the decrease in volume of the liquid phase caused by release of solution gas and/or by the thermal contraction of the liquid; the reciprocal of formation volume factor. |
SIGNAL_TYPE
| Type of data signal. |
SIMULATION_MULTIPLE_COUNT
| Number of multiple reflections considered in the simulation |
SKIN_FACTOR
| The term that accounts for additional pressure drops in the immediate vicinity of a well in well performance calculations. A positive skin indicates damaged conditions, negative indicates stimulated conditions. |
SLACKOFF_FRICTION_COEFFICIENT
| Friction coefficient between a string and the pipe when running into the hole |
SLACKOFF_HOOK_LOAD
| Average slackoff hook load (slackoff weight) over the reporting period. |
SLACKOFF_REEL_BACK_TENSION
| Amount of tension kept on the coiled tubing between the gooseneck and the reel while going into the hole |
SLIDING_WINDOW_DURATION
| Duration (length) in time of the sliding window used for processing. |
SLIPPAGE_VELOCITY
| In two-phase flow, the difference between the velocities of the two phases. |
SLOT_WIDTH
| Width of a slot, such as in a slotted liner. |
SOLIDS_CONCENTRATION
| Solid Concentration (Cutting, clays, polymer) per fluid Volume |
SOLIDS_CONTROL_CONE_COUNT
| Number of cones of a solid Control Equipment |
SOLIDS_CONTROL_CONE_DIAMETER
| Largest Inner Diameter of a Cone |
SOLUTION_GAS_OIL_RATIO
| Measure of the degree to which a gas is soluble in oil, often designated Rs Oil |
SOLUTION_GAS_OIL_RATIO_CORRELATION
| Model used to compute gas solubility in oil |
SPACING_X
| X Axis Spacing |
SPACING_Y
| Y Axis Spacing |
SPACING_Z
| Z Axis Spacing |
SPATIAL_GAMMA_RADIATION_INTENSITY
| Intensity of gamma radiation represented as a function of a spatial path. |
SPECIES
| A category of biological classification ranking immediately below the genus or subgenus. |
SPECIFIC_PRODUCTIVITY_INDEX
| Rate of fluid produced per unit change in limiting pressure per unit of reservoir thickness. For oil wells, PIs is normally expressed in barrels per day per psi per foot of net reservoir thickness. |
SPECIFIC_SURFACE_AREA
| The characteristic of a porous media which is the internal surface area of the medium per unit volume. |
SPECIFIC_VOLUME
| A measure of the volume distribution of a gas or liquid per unit mass. |
SPECTRAL_FLUORESCENCE_INTENSITY
| Intensity of light emitted by a material represented as a function of emitted light wavelength and wavelength of the excitation beam, typically an ultraviolet light source. |
SPECTRAL_GAMMA_RADIATION_INTENSITY
| Intensity of gamma radiation represented as a function of wavelength. |
SPHERICITY
| A measure of the degree of how spherical an object is, such as an Lens within a subsurface Volume |
SPORE_COLOR_INDEX
| Relative color of fossil spores as caused by thermal processes. Index is used as an indicator of thermal maturation of organic material. |
SPOT_DESCRIPTION
| The fractional part of interest within the section |
SPRING_NUMBER
| Spring number of a cylindrical rheometer corresponding to a particular stiffness. Fann 35 spr #1stiffness is 2.2116E-3 Nm/Rad |
SPRING_STIFFNESS
| Coefficient relating Spiral spring exerted force and corresponding elongation |
SPURT
| (Fracturing) Volume of fluid flowing through a given area of porous media which leaks off during the formation of the filter cake. Spurt loss reduces the fluid volume available for fracture extension. Typical Unit: gal/100ft2. |
SQRT_KX_KY
| Geometric mean permeability in the horizontal plane (X-Y) of the reservoir. |
SQRT_KY_KZ
| Geometric mean permeability in the vertical plane (Y-Z) of the reservoir |
STABLE_ELAPSED_TIME
| Time elapsed since production conditions were stable |
STACKING_METHOD_TYPE
| Stacking method (e.g. median, average, auto, manual) |
STANDARD_OIL_FLOWRATE
| Oil flow rate at standard condition when a sample is taken |
STANDARD_PRESSURE
| Pressure considered to be "standard", for rates and volumes reported to be measured at Standard Conditions. |
STANDARD_TEMPERATURE
| Temperature considered to be "standard", for rates and volumes reported to be measured at Standard Conditions. |
STANDOFF
| The amount of physical separation between two objects, usually maintained in order to control their interaction. |
STANDPIPE_PRESSURE
| Mud pressure at the stand pipe manifold, just before the flexhose connecting to the swivel. |
START_AGE
| The earliest (numerically largest) geologic or geochronologic age associated with an event or item, such as an earth layer, a fossil or pollen type. |
START_AGE_CODE
| The code of the earliest geologic or geochronologic age associated with an event or item, such as an earth layer, a fossil or pollen type. |
STATE_CODE
| Catalog-controlled code of a State |
STATIC_POTENTIAL
| Static (built up) pressure of a hydraulic unit, converted to pressure potential at a reference datum depth. |
STATIC_PRESSURE
| Static (non-flowing) Pressure |
STATIC_PRESSURE_DATE
| Date when Static Pressure data were recorded |
STATUS
| An indicator of the state of an entity or process at some moment in time. Also the position or rank in relation to others. |
STD_PARALLEL_1
| First line of latitude along which scale is true, for map projections using two standard parallels; this parallel is NEAREST to the EQUATOR. |
STD_PARALLEL_2
| Second line of latitude along which scale is true, for map projections using two standard parallels; this parallel is NEAREST to the POLE. |
STEEL_GRADE
| Grade used to qualify the characteristics of the steel. For tubulars, grade determines the minimum yield strength and thus the burst and collapse pressures and is of importance for the proper choice of slips. The grade can be either custom, i.e. defined by the supplier, e.g., US Steel FS80, Vallourec 110 VS 22, or defined by the API, e.g., C75, J55, N80, E. Number in the API grade means the minimum yield strength in Kpsi (N80: 80,000 psi). API grades for Tubing, Casing and Drill pipes can be found in the API specifications 5xx. |
STONELEY_VELOCITY
| The velocity of a Stoneley wave; a Stoneley wave is a type of seismic wave which is propagated along an interface, such as a tube wave in a borehole. |
STORAGE_CAPACITY
| The ratio of the sum of layer porosity thicknesses to total system porosity thicknesses for layered porous media. |
STORATIVITY_RATIO
| Ratio of component storativity to total system storativity. Usually known as Omega in reservoir dynamics. |
STORATIVITY_THICKNESS
| The product of the Storativity of a layer and its thickness [phi*Ct*h]. |
STORATIVITY_THICKNESS_RATIO
| Ratio of component storativity-thickness to total system storativity-thickness [phi*Ct*h(i) / phi*Ct*h(total)]. |
STRIPPER_FRICTION_LOAD
| Amount of friction between the coiled tubing and the packoff assembly. It is not the hydraulic pressure within the Stripper. |
STROKE_LENGTH
| Length of stroke (maximum travel), such as for a pump piston or for hydraulic jars). |
STROKE_VOLUME
| Volume of a pump stroke |
STRUCTURAL_DIP_REMOVAL_FLAG
| This property specifies whether the effect of structural dipping on a particular geological zone has been removed. |
STRUCTURAL_DIP_TYPE
| This property specifies whether the structural dip is constant, variable or contemporaneous. |
STRUCTURAL_MODEL_TYPE
| Structural hypothesis chosen to derive the cross section |
SUBGENUS
| A category in biological taxonomy below a genus and above a species. |
SUPPLIER
| Supplier name of a Product. |
SURFACE_AREA
| Measure of the two-dimensional extent of the surface of some object. |
SURFACE_GAS_FLOWRATE
| Gas flowrate (surface conditions) |
SURFACE_LINES_VOLUME
| Total volume of the surface lines equipment |
SURFACE_OIL_FLOWRATE
| Oil flowrate (surface conditions) |
SURFACE_REFLECTION_COEFFICIENT
| Reflection coefficient for the case when the multiples are reflecting from the free surface |
SURFACE_TEMPERATURE
| Temperature above ground. Temperature of the atmosphere. |
SURFACE_WATER_FLOWRATE
| Water flowrate (surface conditions) |
SURVEY_BOTTOM_DEPTH
| Deepest depth to which the borehole was surveyed |
TECTONIC_FEATURE_TYPE
| The type of tectonic environment associated with an Earth subsurface, e.g. Fault, Fold, etc. |
TEMPERATURE
| The degree of hotness or coldness measured on a definite scale |
TEMPERATURE_IN
| The temperature of the input material. |
TEMPERATURE_OUT
| The temperature of the output material |
TERM
| Term of an agreement. Usually in years |
TERMINAL_MODE_FLAG
| Flag indicating whether or not the setup was filled in terminal mode (e.g. via an HP hand calculator). This affects the interpretation of the Job_Duration parameter. |
TEST_DATE
| The date at which a particular test activity was conducted. |
TEST_NUMBER
| The number (or rank) associated with a particular test activity. |
TEXT
| Textual body a document or document section, such as a contract clause. |
TEXT_LOCATION
| Location of a section of text, such as a contract clause; typical locations are paragraph number or line number on a page. |
THERMAL_ALTERATION_INDEX
| An indicator of the thermal maturity of organic matter, based on a relationship between color of organic particles and the length and intensity of heat exposure. |
THERMAL_CONDUCTIVITY
| Heat flux or thermal energy per unit length and temperature. The capacity of a body to conduct or pass thermal energy. The capacity of a material to conduct or pass thermal energy. |
THERMAL_GRADIENT
| The rate of change of temperature with length. |
THICKNESS
| The smallest of three dimensions {length, width, and thickness} |
THICKNESS_LOSS
| Loss of thickness due to any action such as corrosion or erosion |
THIN_OUT_AZIMUTH
| Azimuth of the thin out of a barrier type depositional environment. |
THROUGHPUT
| A measure of the mass produced, say from some facility, per unit time. |
TIME_INCREMENT
| Time increment between samples indexed by time. |
TO_CONN_NUMBER
| Indicates which end or connection number (1 or 2 for tubulars, 3 for a hydraulic T,...) of the "To" equipment in a From_To equipment connection. The description of the "To" connection number is needed in some cases for equipment item which is last in the connection chain. When no ambiguity exists, the From_Conn_Number is the preferred property. |
TO_DATUM_CODE
| Code of the target datum used in a datum-to-datum coordinate system transformation (datum shift). |
TOOL_DEVIATION
| Angle between the tool axis and the vertical. |
TOOL_MEASURE_POINT_OFFSET
| Distance from the Measure Point to the Tool Reference Plane (most often the bottom tool make-up plane); a positive value indicates that the Measure Point is above the Reference Plane. [Traditionally stored in Parameter MPOI on LIS/DLIS tapes.] |
TOOL_SPEED
| Speed of the tool; logging speed. |
TOOL_STRING_MEASURE_POINT_OFFSET
| Distance from the Measure Point to the Tool String (not just Tool!) Reference Plane; a positive value indicates that the Measure Point is above the Reference Plane. [Traditionally referred to as "tool zero".] |
TOOL_TYPE
| The type of a Tool usually used in some activity, e.g. CNTA, USIT, AIT, etc. |
TOP_CHARGE_OFFSET
| Distance from the bottom (make-up plane) of the gun or the assembly of guns to the upper perforating charge |
TOP_DEPTH
| Shallowest depth of an interval |
TOP_DIP_NUMBER
| Number of Dip (in the Dip Set) at the top of the Bed |
TOP_DISCONTINUITY_TYPE
| Type of Discontinuity forming the top boundary |
TOP_VALUE
| Value at the top of an interval. |
TORQUE
| A force that produces rotation or torsion and whose effectiveness is measured by the product of the force and the perpendicular distance from the line of action of the force to the axis of rotation. |
TORTUOSITY
| A characteristic of permeable media that is the squared ratio of the mean flow path length to the medium length. |
TOTAL_COMPRESSIBILITY
| Compressibility of the rock matrix combined with fluid compressibilities within the matrix. |
TOTAL_FLOW_AREA
| Total cross-sectional area through which fluid can flow. |
TOTAL_FLOWRATE
| Sum of the flowrates coming from different sources |
TOTAL_FORMATION_VOLUME_FACTOR
| Ratio of fluid volume (liquid + total solution gas) at specified (typically, reservoir) conditions to the volume of liquid and residual solution gas at surface (stock tank) conditions. Used for two-phase systems; abbreviated Bt; typical range 1.1 - 200. |
TOTAL_HARDNESS
| Sum of Ca and Mg concentration in water, API RP13B, Section 8, Water Based Mud, expressed as being entirely composed of calcium |
TOTAL_ORGANIC_CARBON
| Volume concentration of organic carbon relative to the total volume. |
TOTAL_ORGANIC_MATTER
| Relative content of organic matter in a material, such as a rock sample. Calculated as total organic Carbon * 1.22. |
TOTAL_PERMEABILITY_THICKNESS
| Total permeability-thickness [= kh(1) + kh(2)] for a vertical interference test |
TOTAL_SKIN
| The sum of all formation, completion, and fluid flow skin factors. |
TOTAL_STORATIVITY_THICKNESS
| Sum of the Storativity_Thickness values of all layers in the model. |
TRACE_COUNT_RECEIVER
| The maximum number of traces which were recorded at any individual receiver for all source events |
TRACE_COUNT_SOURCE
| The maximum number of traces assigned to the source |
TRADE_NAME
| An arbitrarily adopted name that is given by a manufacturer or merchant to an article or service to distinguish it as produced or sold by him and that may be used and protected as a trademark. |
TRANSFER_DURATION
| Duration of sampling operation |
TRANSFER_FLUID_TYPE
| Liquid displaced away during sampling |
TRANSIENT_END_TIME
| End time (tend) of the Transient |
TRANSIENT_FINAL_FLOWRATE
| Flowrate at Transient End Time (qend) |
TRANSIENT_FINAL_PRESSURE
| Pressure at Transient End Time (pend) |
TRANSIENT_INITIAL_FLOWRATE
| Flowrate at start of Transient |
TRANSIENT_INITIAL_PRESSURE
| Pressure at start of Transient |
TRANSIENT_START_TIME
| Start time (t0) of the Transient |
TRANSVERSE_DISPERSIVITY_COEFFICIENT
| The coefficient used as a multiplier of interstitial velocity to estimate dispersion normal to the direction of movement for a displacement front. |
TREATMENT_BOTTOM_DEPTH
| Depth of the borehole at the moment of the treatment |
TREATMENT_DISPLACEMENT_VOLUME
| Dead volume including the surface treating lines to be pumped to move the treating fluid down to formation. In cementing it is the volume (through casing/tubing/ drill_pipe) up to the landing collar; in acidizing it is the tubing volume to the perforations. |
TREATMENT_FLOW_PATH
| Indicates how the fluid is pumped into the well e.g. by the casing, the tubing, the annulus Casing-tubing ... |
TREATMENT_NUMBER
| Internal Dowell treatment number |
TRIMMED_LENGTH
| Length of material which has been cut away either to prevent fatigue rupture on a cable or a coiled tubing or to connect an equipment |
TRUE_SCALE_LATITUDE
| Latitude at which scale is true, as with a standard parallel. |
TRUE_STRATIGRAPHIC_THICKNESS
| Cumulative thickness of an earth layer, measured perpendicular to the bedding plane, thus eliminating any offset effect due to borehole deviation or structural dip. Also called True Bed Thickness. |
TRUE_VERTICAL_DEPTH
| The true vertical depth from the surface of the Earth to a particular subsurface point. |
TRUE_VERTICAL_THICKNESS
| Isochores obtained by correcting for structural dip in order to account for the lateral offset of the intersections of the well bore with the top and bottom of a layer. |
TURBULENCE_COEFFICIENT
| The coefficient that describes the additional pressure drop due to inertial effects for high velocity gas flow. |
TVD_COMPUTATION_METHOD
| Method of defining the wellbore trajectory based upon directional survey data; includes curve fitting to the survey points and extrapolating beyond them. |
UP_LOAD
| Upward load exerted on an equipment item. |
UPPER_FLUID_TYPE
| The type of fluid found in the layer above a reference surface (e.g. Water in layer above a Fluid Contact in a Reservoir,) |
UPPER_SURFACE_RELATION
| The type of relationship between a surface and the ones above (e.g. the surfaces below a Horizon are onlapping.) |
VARIABLE_DECK_LOAD
| Current temporary load on the rig deck |
VELOCITY_TO_SEISMIC_DATUM
| Velocity of the medium between the zero-time reference of a particular survey to the Seismic Reference Datum. |
VERT_HOR_PERMEABILITY_RATIO
| The ratio of vertical to horizontal permeability in a permeable medium. |
VERTICAL_GEOMETRIC_SKIN
| In a horizontal well, skin effect due to the limited entry in the vertical direction. |
VERTICAL_LIFT_DEPTH
| Tubing depth in vertical lift fluid flow computation |
VERTICAL_LIFT_FLOW_REGIME_FLAG
| Flag identifying flow regime flag at some depth |
VERTICAL_LIFT_PRESSURE
| Computed pressure at some depth in tubing |
VERTICAL_LIFT_TEMPERATURE
| Computed temperature at some depth in tubing |
VERTICAL_PERMEABILITY
| A permeability oriented vertically perpendicular to the bedding plane of the stratum. Usually abbreviated as Ky. |
VERTICAL_SECTION_AZIMUTH
| Angle between the true north and the vertical section plane. |
VERTICAL_SIZE
| The size of any object as measured vertically |
VISCOSITY
| The property of a substance offering internal resistance to flow; a measure of the degree of fluidity. |
VISIBILITY
| Maximum distance at which objects can still be discerned or identified visually. |
VISIBLE_WIDTH
| For core images, the width of the core which is visible in the image. |
VITRINITE_REFLECTANCE
| The optical reflectivity of solid organic constituents of rock, known as vitrinite, which provides an indication of thermal maturity. |
VOLUME
| A measure of the space occupied by a body in cubic units; e.g., cm3, in3, quarts, liters, etc. |
VOLUME_FRACTION
| The ratio of the volume occupied by two component, or by one component to the total volume of the system. |
VOLUME_PER_LENGTH
| The measure of volume per linear displacement, usually given in bbl/in, bbl/ft, U.S. gal/ft. |
VOLUME_SAFETY_FACTOR
| Volume in excess of what has been calculated for the job. Used to account for loss or safety margin |
VOLUMETRIC_COEFFICIENT
| Multiplicative factor (Volume per pulse), sometimes called K Factor. |
VON_MISES_STRESS
| Normalized sum of the square of the differences of principal stresses applied to a material, e.g. for coiled tubing hoop, bending & radial. See Von_Mises_To_Yield_Ratio. |
VON_MISES_TO_YIELD_RATIO
| Ratio of the Von_Mises_Stress to the Yield Strength of the material : It helps determine whether the material has yielded (permanently damaged) by comparing to the yield_stress (>1, permanently deformed). |
WALL_BUILDING_COEFFICIENT
| (Fracturing) Measure of the capability of a fluid flowing in front of a porous media to build up a filter cake inhibiting the fluid leakoff through the porous media. Non RPP66 unit :length/(time)**1/2 e.g. ft/mn**1/2 |
WARMUP_DURATION
| Duration between power-on time and acquisition start time. |
WATER_ACTIVITY
| Measure of the water concentration in aqueous solutions expressed as a decimal fraction between 0 and 1 ( = 1 for pure water) |
WATER_BUBBLE_FLOW_VELOCITY
| Water Bubble Velocity |
WATER_COMPRESSIBILITY
| The compressibility of water at a given pressure and temperature. |
WATER_CONCENTRATION
| Water Concentration per fluid Volume |
WATER_CONDUCTIVITY
| Conductivity of Connate Water (in formation) |
WATER_CUT
| The percent of water per total volume of liquid over a period of time for a product flow network unit. |
WATER_DENSITY
| The density of water. |
WATER_FLOW_VELOCITY
| Flow velocity of water component of fluid. |
WATER_FLOWRATE
| Rate of flow of water |
WATER_FORMATION_VOLUME_FACTOR
| Ratio of water volume at specified (typically, reservoir) conditions to the water volume at surface (stock tank) conditions. Normally abbreviated Bw; typical range .99 - 1.07. |
WATER_FRACTION
| Volumetric fraction of water in the total fluid |
WATER_RESISTIVITY
| Resistivity of Connate Water |
WATER_SALINITY
| Total salts in solution (Na, K, Cl, So4, ..). Normal sea water has around 35,000 ppm (parts per million) salinity. Less than 2,000 ppm is considered "fresh". |
WATER_SATURATION
| The extent to which the pore space in a formation contains water. |
WATER_VISCOSITY
| The viscosity of water at specific temperature and pressure conditions. |
WATER_VISCOSITY_CORRELATION
| Model used to compute water viscosity |
WAVE_AZIMUTH
| Azimuth of the direction from which the waves are coming. |
WAVE_HEIGHT
| Average trough-to-peak height of the waves. |
WAVE_PERIOD
| Average elapsed time between the passing of two wave peaks. |
WEIGHT
| The force with which a body is attracted toward the center of the earth or any celestial body by gravitation. The product of the mass of the body by the local gravitational acceleration. |
WEIGHT_ON_BIT
| The downward force exerted by the drillbit on the formation being drilled. |
WEIGHT_PER_JOINT
| Weight of each joint in a string of equipment |
WEIGHT_SAFETY_FACTOR
| Weight in excess of what has been calculated for the job. Used to account for loss or safety margin |
WELDED_SECTION_FLAG
| Y/N : does the section has a weld or not : used as a weak point flag in coiled tubing. |
WELL_COUNT
| The count of the numbers of wells. |
WELL_JOB_COUNT
| Total Number of jobs |
WELL_NAME
| Name given to a well, quite possibly the legal name. The name may vary as ownership and rights are transferred. |
WELL_PRODUCTION_CONTROL_MODE
| Describes what controls the production flow of the well (e.g. constant wellhead pressure, constant flowrate) |
WELL_PROJECTION_TYPE
| Characterizes the way a well borehole is projected onto a cross section. |
WELL_TEST_MODEL
| Type of well test: e.g. Conventional, Horizontal, Interference, etc. |
WELL_TEST_MODEL_TYPE
| Type of Well Test Model selected |
WELL_TEST_TYPE
| The type of test conducted on a Well. |
WELL_TO_BOUNDARY_DISTANCE
| The distance between the well trajectory and the adjacent reservoir boundary distance. |
WELL_TO_BOUNDARY_DISTANCE_X
| The distance between the well trajectory and the adjacent reservoir boundary in the X direction. |
WELL_TO_BOUNDARY_DISTANCE_Y
| The distance between the well trajectory and the adjacent reservoir boundary in the Y direction. |
WELL_TO_FAULT_ANGLE
| The angle between the well and either sealing fault in a wedge well test model. |
WELL_TO_FAULT_DISTANCE
| The distance between the sealing fault and the well trajectory. |
WELL_TO_FRACTURE_ELEMENT_DISTANCE
| Distance from Borehole to start of fracture element |
WELL_TREATMENT_FLUID_TYPE
| Type of Fluid used in Well Treatment operation |
WELLBORE_STORAGE
| Measure of the ability of the wellbore to store fluid ("afterflow" when a well is shut in) or unload fluid (when a well is opened to flow). |
WELLBORE_STORAGE_TYPE
| Describes Wellbore storage behavior as either constant, variable (exp), or variable (erf). |
WELLBORE_TORTUOSITY_AMPLITUDE_ANGLE
| Amplitude translated as an inclination of the sinusoidal function fitting the survey station points and simulating a real well path |
WELLBORE_TORTUOSITY_WAVE_LENGTH
| The wave length of the sinusoidal function fitting the deviation survey station points and simulating a real well path |
WELLHEAD_CONNECTION_TYPE
| Type of wellhead connection (flange, tree- saver ..); data must identity the mechanical item unambiguously to allow a hydraulic connection e.g. Studded Flange API BX150-15000 psi. |
WELLHEAD_FLOWING_PRESSURE
| Pressure at the Wellhead with well flowing |
WELLHEAD_FLOWING_TEMPERATURE
| Temperature at the Wellhead with well flowing |
WELLHEAD_GAS_FLOWRATE
| Gas flowrate at the Wellhead |
WELLHEAD_LIQUID_FLOWRATE
| Liquid flowrate at the Wellhead |
WELLHEAD_PRESSURE
| The producing or shutin pressure at the top of the well before any surface pressure drops. |
WELLHEAD_SHUTIN_PRESSURE
| Static wellhead pressure during test |
WELLHEAD_TEMPERATURE
| The temperature at the wellhead occurring at the time of the activity being performed on the well. |
WET_GAS_CRITICAL_PRESSURE
| The pressure needed to condense a wet gas at its critical temperature (Wet gas : mixture of free gas plus condensate) |
WET_GAS_CRITICAL_TEMPERATURE
| The highest temperature at which the gas can exist as a liquid and above which its vapor cannot be liquefied regardless of the amount of pressure (Wet gas - mixture of free gas plus condensate) |
WET_GAS_GRAVITY
| The ratio of the molecular weight of the wet gas to that of air (Wet gas - mixture of free gas plus condensate) |
WETTABILITY_INDEX
| Relative affinity of a mineral surface for hydrophilic or hydrophobic fluids. |
WIND_AZIMUTH
| Azimuth of the direction from which the wind is blowing. |
WIND_VELOCITY
| Velocity of the wind |
WINDCHILL_TEMPERATURE
| A measure of the combined chilling effect of wind and low temperature on living things, also named chill factor, e.g., according to US weather service table, an air temperature of 30 degF with a 10 mi/h corresponds to a "windchill" of 22 degF. |
WINDOW_END_TIME
| End time of the processing window. |
WINDOW_START_TIME
| Start time of the processing window. |
WIRE_DIAMETER
| Diameter of wire, such as that used in a mesh or a slotted liner |
X_DIRECTION_PERMEABILITY
| Permeability in X Direction |
Y_DIRECTION_PERMEABILITY
| Permeability in Y Direction |
YIELD_STRENGTH
| Stress which will produce a small amount of deformation generally equal to a strain of 0.2%. This value is a little greater than the Elastic limit. It is often supplied by the manufacturer of the material. |
YIELD_STRESS
| Shear stress at 0 shear rate for Bingham Plastic (BP) rheological model, otherwise named Bingham yield value or yield point. BP fluid remains static until applied forces build up to the point where it starts to move. See Plastic_Viscosity. |
YOUNG_MODULUS
| The stress-strain ratio when a rod is pulled or compressed. E = (Delta F / A) / (Delta L / L), where Delta F, L denotes the change in Force and Length, and A stands for the cross-sectional area. |
Z_FACTOR
| The factor which corrects for the deviation of a gas from the ideal gas law when calculating PVT relationships. |
ZONE_SET_TYPE
| The type of a set of zone intervals traversing one or more Boreholes and/or one or more Earth subsurface Volumes. |