Schlumberger

Mnemonics, Software product, GEOFRAME


CodeGEOFRAME
NameGeoFrame
DisciplineGeneral
TypeSYSTEM
DescriptionA general-purpose oilfield data interpretion system, providing process control, data management, graphics and utility software support for applications.

Related channels
ChannelDescription
DEVIATION_SURVEY Ordinally-indexed array of Deviation Survey data: MD, TVD, DX and DY
SYNTHETIC_SEISMIC_SECTION Seismic section created from synthetic traces or by extracting data from an actual seismic section.

Related parameters
ParameterDescription
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.


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