Curve Mnemonic Dictionary

Mnemonics, Software product, GEOFRAME

Code	GEOFRAME
Name	GeoFrame
Discipline	General
Type	SYSTEM
Description	A general-purpose oilfield data interpretion system, providing process control, data management, graphics and utility software support for applications.

Related channels

Channel	Description
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

Parameter	Description
ABANDON_PRESSURE	The pressure at which a reservoir was or is expected to be abandoned.
ABANDON_TIME	The time that a reservoir was or is anticipated to be abandoned.
ABSOLUTE_ABUNDANCE	Quantity of members in a group, as expressed as a count and count units, such as 5 sacks, 3 boxes, or 4 items.
ABSOLUTE_DELTA_FLOWRATE	Absolute value of Delta Flow Rate
ABSOLUTE_PERMEABILITY	The permeability of porous material when completely saturated with a wetting fluid and without the influence of non-Darcy (turbulence) effects. Also called "intrinsic" permeability.
ABSOLUTE_ROUGHNESS	Average amplitude of rugosity, such as the variations in the radius of tubing.
ACCIDENT_TYPE	Type of Quality, Health, Safety, and Environmental accident such as Fluid Spill, Kick While Drilling, Kick While Tripping, ...
ACID_CONCENTRATION	Concentration of acid.
ACID_TREATMENT_COUNT	Number of acid jobs
ACOUSTIC_CONTRAST	Interface property which is the difference between the Acoustic Impedance values of two adjacent beds.
ACOUSTIC_IMPEDANCE	Property which controls the propagation of an ultrasonic wave at a boundary interface. It is the product of the material density and the acoustic wave velocity within the material.
ACOUSTIC_VELOCITY	The velocity of an acoustic wave which represents the rate at which the wave travels from one point to another.
ACQUISITION_ENABLE_FLAG	Flag indicating whether or not acquisition is enabled for this activity.
ACTIVATION_PRESSURE	Pressure at which recording should begin
ACTIVATION_TEMPERATURE	Temperature at which recording should begin
ADDRESS	The location where some entity or information may be found or contacted.
ADJUSTABLE_CHOKE_FLAG	Flag indicating whether this flow period was performed on an adjustable choke, i.e., when set: adjustable choke, not set: fixed choke.
ADMITTANCE	The reciprocal of Impedance. The property of a medium to allow for the flow of an alternating current.
ADSORPTION	The adhesion in an extremely thin layer of molecules (as of gases, solutes, or liquids) to the surfaces of solid bodies or liquids with which they are in contact
AFFINE_COEFF_A	Coefficient "A" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AFFINE_COEFF_B	Coefficient "B" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AFFINE_COEFF_C	Coefficient "C" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AFFINE_COEFF_D	Coefficient "D" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AFFINE_COEFF_E	Coefficient "E" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AFFINE_COEFF_F	Coefficient "F" in an Affine transformation between two coordinate systems. The input and output coordinate systems may be local or projection systems.
AGENCY_LEASE_NUMBER	Unique lease number assigned by leasing agency
AGREEMENT_INTEREST	Percentage of interest held by one of the potentially many organizations holding a lease agreement.
AGREEMENT_STATUS	Status of a lease agreement.
AIR_SUPPLY_PRESSURE	Air supply pressure; for a burner, the pressure required to achieve effective atomization
ALKALINITY	Concentration of basic anions in an aqueous solution (e.g. OH-, CO3-- and HC03-)
ALTERNATE_PHONE_NUMBER	Alternate phone number, including country code.
ALTITUDE	Height above a reference level, usually the geoid (e.g., mean sea level).
AMOUNT	Quantity, total number
AMOUNT_OF_SUBSTANCE	The amount of a particular substance (e.g. chemical) expressed in units of moles.
ANCHOR_TENSION	Tension of the anchor chains or cables of a marine vessel; may be implemented as a vector.
ANGULAR_VELOCITY	Rotation rate, usually measured in revolutions per unit time; e.g., spinner speed, motor speed, etc. The term Angular Frequency is also used, but generally refers to data scaled in radians per second.
ANNUAL_PAYMENT	Annual amount of Payment based on some contractual agreement such as a lease. This could be rental, mortgage or other.
ANTI_COLLISION_METHOD	Method used for calculating the proximity: 0 - Normal; 1 - Horizontal; 2 - Least Distance
API_COUNTRY_CODE	Code used by the API (American Petroleum Institute) to identify sovereign nations, colonies, overseas territories, etc.
API_ENTRANCE_HOLE_DIAMETER	Entrance hole diameter in an API Section I test
API_GRAVITY	A measure of the density of hydrocarbons derived from the equation: API gravity = 141.5/(specific gravity @ 60 degF) - 131.5; usually reported with a temperature.
API_NEUTRON	The Neutron calibration measurement determined using the API test pit. This quantity is associated with the natural formation hydrogen concentration.
API_TOTAL_PENETRATION	Total penetration in an API Section I test
API_WELL_NUMBER	A unique well identification number as defined in the API (American Petroleum Institute) Bulletin D12A, as amended
APPARENT_VISCOSITY	Ratio Shear Stress/Shear Rate. Equal to Newtonian Viscosity for Newtonian fluid.
ARCHIE_POROSITY_CONSTANT	The constant "a" in the Archie formation resistivity factor - porosity relationship.
ARCHIE_POROSITY_EXPONENT	The exponent of the Porosity term in the Archie formation resistivity factor - porosity relationship. Abbreviated "m".
AREA_PER_MASS	An amount of surface corresponding to a unit mass.
AUTHORIZATION_FOR_EXPENDITURE	Identifier of granted or candidate request for authorization to spend money, usually for a specified purpose and amount. Abbreviated AFE
AVG_PENETRATION_RATE	Average drilling penetration rate (ROP)
AVG_RESERVOIR_PRESSURE	The average pressure (somewhere in the reservoir) between the borehole pressure and external boundary pressure.
AVG_WEIGHT_ON_BIT	Average "Weight On Bit" (WOB)
AWARD_DATE	Date lease awarded
AXIAL_LENGTH	The length associated with the longest dimension of an object. This corresponds to the height of a cylinder, or the longest axis of a rectangle.
AZIMUTH	The horizontal angle specified clockwise from true North. Occasionally azimuth will be specified relative to the South or Magnetic North. Also called True Bearing.
BACK_PRESSURE_DROP	Constant pressure drop on a flowline used mainly to approximate any kind of restriction, choke, nozzle ...
BACKGROUND_PRESSURE_TREND	Background pressure trend for a horizontal interference test
BASE_FLUID_TYPE	The type of the base fluid usually used in chemical mixing, such Oil or Water.
BASE_FOR_SPACING	A flag that determines which reference along a Borehole will be used to space Boreholes on a Cross Section.
BAUD_RATE	The speed at which data are transmitted, different from Bit_Rate due to protocol overhead.
BEAUFORT_SCALE_NUMBER	The Beaufort wind scale is a system used to estimate and report wind speeds when no measuring apparatus is available. It was invented in the early 19th century by Admiral Sir Francis Beaufort of the British Navy as a way to interpret winds from conditions at sea, e.g. 5 on the Beaufort scale corresponds to a wind of 17-21 knots and is defined as "Fresh Breeze: Moderate waves (1.8m), many white horses."
BED_CHARACTER	The Characteristic given to a Bed or layer (e.g. has sealing characteristic or is probable source rock.)
BED_SET_TYPE	The type of bed grouping
BEND_1_ANGLE	Angle of first bend in equipment item.
BEND_1_TO_BOTTOM_CONN	Length from the first bend to the bottom connection of the tool
BEND_2_ANGLE	Angle of second bend in equipment item.
BEND_2_TO_BOTTOM_CONN	Length from the second bend to the bottom connection of the tool
BENDING_MOMENT_PER_LENGTH	For a rotating body, the product of force and length of angular displacement normalized for the radius of rotation.
BID_AMOUNT	Amount of lease bid
BID_NUMBER	Bid number assigned by governing agency
BIOT_COEFFICIENT	The proportion of fluid pressure in a material which acts to counterbalance overburden pressure. Used in the calculation of net overburden: P_eff = P_overburden - (Biot_Coefficient * P_fluid)
BIOTURBATION_TYPE	The type of Bioturbation: the mixing of sediments by burrowing organisms.
BIT_DEPTH	Depth of the drillbit
BLADE_GAUGE_LENGTH	Length of the in-gauge portion of the blade.
BLADE_HEIGHT	Height of blade at gauge from the body of the equipment, such as a stabilizer.
BLADE_LENGTH	Length of blade measured along spiral; used for drill stabilizer blades.
BLADE_SPIRAL	Degree of spiral blade coverage 0, 270, 450, -270. (0-straight blade; Negative-left spiral; Positive-right spiral)
BLADE_TO_CONN_2	Distance from blade to Connection 2.
BLADE_WIDTH	Width of the blade at gauge, as used for drill stabilizer blades.
BLOCKING_METHOD_TYPE	Blocking method
BOAT_TYPE	Supply boat, tanker, dynamic positioning vehicle etc.
BOB_NUMBER	Bob number. The bob is the inner cylinder of a cylindrical rheometer. Each number corresponds to a different size. Standard bob is #1
BOILING_POINT	The temperature at which fractions of a liquid boil.
BORE_COUNT	Number of bores, as in a production packer.
BORED_FLAG	Flag to indicate that equipment item has been bored.
BOREHOLE_DIAMETER	The inside diameter of a borehole.
BOREHOLE_RADIUS	Radius of the open borehole. Normally taken as the radius of the drillbit.
BOTTOM_DEPTH	Deepest depth of an interval
BOTTOM_DIP_NUMBER	Number of Dip (in the Dip Set) at the bottom of the Bed
BOTTOM_DISCONTINUITY_TYPE	Type of Discontinuity forming the bottom boundary.
BOTTOM_VALUE	Value at the bottom of an interval.
BOTTOMHOLE_CIRCULATING_PRESSURE	The pressure at the bottom of a borehole during circulation of any fluid.
BOTTOMHOLE_CIRCULATING_TEMPERATURE	The bottom hole temperature reached when circulating. Due to the cooling effect of the drill fluid, BHCT is below the BHST.
BOTTOMHOLE_END_TYPE	Indicates what limits the total depth (plug back, borehole bottom, bridge plug, sump packer ...)
BOTTOMHOLE_FLOWING_PRESSURE	Flowing pressure inside the wellbore at midpoint of the completed interval. Res. Eng. Pwf
BOTTOMHOLE_FLOWING_TEMPERATURE	Temperature at the bottom of the well while flowing.
BOTTOMHOLE_PRESSURE	The pressure at the bottom of a borehole generally associated with the pore pressure of the formation open to the well.
BOTTOMHOLE_SHUTIN_PRESSURE	The pressure at the bottom of a borehole with the well shut in.
BOTTOMHOLE_STATIC_TEMPERATURE	The bottom hole equilibrium temperature (when circulation is stopped)
BOTTOMHOLE_TEMPERATURE	The temperature at the bottom of a borehole occurring at the time of the activity being performed on the well.
BOUND_WATER_CONDUCTIVITY	Conductivity of water bound to clay in the formations.
BOUND_WATER_RESISTIVITY	Resistivity of water bound to clay in the formations.
BOUND_WATER_SATURATION	The extent to which the pore space in a formation contains bound water.
BOWL_SPEED	The bowl speed of a centrifuge.
BOX_NUMBER	Number of box in which an item or sample is stored.
BREAKDOWN_PRESSURE	The pressure required to create a hydraulic fracture in an unfractured formation; it is greater than fracture closure pressure except in rare cases, such as very low fracture toughness and very large horizontal stress anisotropy.
BUBBLE_FLOW_VELOCITY	The rate at which a fluid bubble, gas or liquid, flows through another fluid, gas or liquid. The Velocity depends on the densities and viscosities of the fluids.
BUBBLE_POINT_PRESSURE	The pressure at reservoir temperature at which gas in solution in crude oil comes out of solution as free gas.
BUBBLE_POINT_TEMPERATURE	The temperature at reservoir conditions at which gas in solution in crude oil comes out of solution as free gas.
BUILDUP_PRESSURE	Pressure recorded in the borehole at downhole conditions during a pressure buildup test.
BULK_ADDITION_MODE	Describes how the bulk material was added to the mixture.
BULK_DENSITY	Density of bulk material, including any void space or other materials contained in the subject volume. In well logging, it is the density of the rock, including fluid-filled pore space.
BULK_MODULUS	The stress-strain ratio under simple hydrostatic pressure. k = Delta P / (Delta V / V), where Delta P, V denotes the change in Pressure and Volume.
BURNER_HEAD_COUNT	Number of heads of the burner (conventionally, 3,4 or 6)
BUSINESS_ASSOCIATE_JOB_TITLE	The assignment of an administrative job title to a business associate in the context of a business association
C2H6_CONCENTRATION	Concentration of C2H6 by volume. Typical value in natural gas 6%.
C3H8_CONCENTRATION	Concentration of Propane (C3H8); typical volume concentration in natural gas is 2%.
C4H10_CONCENTRATION	Concentration of Butane (C4H10).
C5H12_CONCENTRATION	Concentration of Pentane (n-C5H12).
C6H14_CONCENTRATION	Concentration of Hexane (C6H14); typical volume concentration in natural gas is 0.3%.
C7H16_CONCENTRATION	Concentration of Heptane (C7H16)
C7PLUS_CONCENTRATION	Concentration of Heptane and hydrocarbons heavier than Heptane; typical volume concentration in natural gas is 0.5%
CABLE_SPEED	Cable speed, generally measured at the surface as an approximation of tool speed.
CACL2_CONCENTRATION	CaCl2 concentration.
CALCIUM_CONCENTRATION	Calcium concentration (Water Based Mud and water phase for Oil Based Mud)
CALIBRATION_COEFFICIENT_CODE	Calibration coefficient code for calibration performed with pressure sensor
CALIBRATION_DATE	The date of calibration for the equipment
CAPACITANCE	The ratio of charge (Q in coulombs) on a capacitor to the potential across it (V in volts) yields the Capacitance (C in Farads).
CAPILLARY_NUMBER	The ratio of capillary to viscous forces on fluids in a porous media.
CAPILLARY_PRESSURE	The difference in pressure between two phases, air fluid, gas fluid or between two fluids, measured at points of the interconnected phases.
CAPILLARY_TRANSITION_ZONE_HEIGHT	The vertical interval height that describes the transition between two different fluid phases in a porous media. This transition is caused by changes in saturation dependent capillary forces in equilibrium with gravitational forces.
CASING_ROTATION_FRICTION_COEFFICIENT	Friction coefficient due to rotation between casing and other surface (e.g. drill string).
CASING_SHOE_DEPTH	Casing shoe depth
CASING_SLIDING_FRICTION_COEFFICIENT	Friction coefficient due to sliding between casing and other surface (e.g. drill string), when only sliding motion is present
CASING_TRANSLATION_FRICTION_COEFFICIENT	Linear component of the friction coefficient between casing and drill string during an helical movement, e.g., reaming mode
CATION_CONCENTRATION	The concentration of cations, the positively charged particles, in the solution of an electrolyte.
CATION_EXCHANGE_CAPACITY	A measure of the extent to which a substance will supply exchange cations.
CEMENT_SHEATH_THICKNESS	Thickness of the cement sheath between casing and borehole wall.
CENTRAL_LINE_BEARING	Azimuth of central line of projection.
CENTRAL_LINE_PT1_LATITUDE	Latitude of first point on central line of projection.
CENTRAL_LINE_PT1_LONGITUDE	Longitude of first point on central line of projection.
CENTRAL_LINE_PT2_LATITUDE	Latitude of second point on central line of projection.
CENTRAL_LINE_PT2_LONGITUDE	Longitude of second point on central line of projection.
CENTRAL_MERIDIAN	The meridian on a graticule that is the axis of symmetry for the geometric properties of the graticule displayed on a map projection.
CENTRALIZER_COUNT_PER_JOINT	Number of centralizers per joint, e.g. 2 per joint.
CENTRALIZER_TEST_TYPE	The type of a Centralizer Test used to test a centralizer, usually during any well operation.
CH4_CONCENTRATION	Concentration of Methane (CH4); typical volume concentration in natural gas is 85%.
CHANNEL_WIDTH	The perpendicular distance between two parallel boundaries.
CHEMICAL_CONCENTRATION	The concentration of a chemical usually used during well operations, like drilling, cementing, acidizing, fracturing, etc.
CHEMICAL_FORMULA	A symbolic expression of the composition or constitution of a substance.
CHLORIDE_CONCENTRATION	Concentration of chloride ions in water based mud or in the water phase of oil based bud
CHOKE_SIZE	Internal diameter of the flow choke(s)
CLASSIFICATION_METHOD_CODE	Classification method used in this activity.
CLAY_RESISTIVITY	The Resistivity of clay, usually referring to that measured in the Earth formations.
CLIENT	The code of a client, usually that of a Service, Contractor, Vendor or E&P company
CLIENT_REPRESENTATIVE	Name of the client representative or company man.
CO_CONCENTRATION	Concentration of Carbon Monoxide (CO)
CO2_CONCENTRATION	Concentration of Carbon Dioxide (CO2)
CO2_FOAM_QUALITY	Ratio volume of CO2 over foam volume. Indicator of the quality of a foam generated with CO2 for well treatment. Below 50% the foam is not stable, above 95% the foam changes to a mist. C02 foam are used when low pH is required.
COLOR	The aspect of objects and light sources that may be described in terms of hue, lightness, and saturation for objects and hue, brightness, and saturation for light sources.
COLOR_DISTRIBUTION	A descriptive remark with respect to the distribution of a color within the area of a rock surface; e.g. solid, spotty, streaky.
COLOR_FLUORESCENT_LIGHT	The color emitted by the fluid upon exposure to fluorescent light. Certain photoactive hydrocarbon molecules display characteristic color patterns under these conditions.
COLOR_INTENSITY	A descriptive comment with respect to the intensity of color; e.g. bright, dull, powdery.
COLOR_NORMAL_LIGHT	The color of a hydrocarbon show under normal incident light.
COMPANY_LEASE_NUMBER	Unique lease number assigned by owning company
COMPLETION_COUNT	The count of the number of completions.
COMPLETION_DATE	Date well was completed
COMPLETION_SKIN	The skin effect resulting from the completion.
COMPRESSIBILITY	The change in specific volume and density under pressure; the reciprocal of Bulk Modulus, 1/k.
COMPRESSIONAL_VELOCITY	Velocity of a compressional acoustic wave (Vp).
COMPRESSIVE_STRENGTH	The degree of resistance of a material to force acting along one of the axes in a manner tending to crush it.
COMPUTATION_MASK	Application-specific mask for the computation options (one Anadrill example: 0001 - Torque & Drag, 0010 - BHA Tendency, 0100 - Bit Side Forces, 1000 - Buckling, 10000 - Yield Stress)
COMPUTATION_TYPE	Computation method used in the generation of data.
CONCENTRATION	The relative content of a component; e.g., the concentration of salts in brackish water, the concentration of electric charges in a circuit, etc.
CONDUCTANCE	The product of conductivity and thickness. With direct current, the reciprocal of resistance. With alternating current, the resistance divided by the impedance squared; the real part of impedance.
CONDUCTIVITY	A measure of the quantity of electricity transferred across unit area per unit potential gradient per unit time. In isotropic material, it is the reciprocal of Resistivity. Sometimes called Specific Conductance.
CONFIDENCE_FACTOR	The confidence factor associated with any event or feature related to or detected, for example a geologic feature in/on the Earth.
CONFIDENTIALITY_LEVEL	Describes the confidentiality of the information related to the well, e.g., Tight (operator only), Sensitive (some restriction), Public
CONN_1_BOX_FLAG	Flag indicating if Connection 1 is a Box (Y) or a Pin (N).
CONN_1_OUTSIDE_DIAMETER	Outside diameter of tool joint/connection 1
CONN_1_SIZE	Size of the top or the first standard tool connection.
CONN_1_THREAD_TYPE	Complete and non ambiguous identification of the first threaded connection, e.g., "Hydril Joint Type EIU", "Pittsburgh Special ACME-Thread Casing-Internal-upset"
CONN_1_TYPE	Type of the top or the first standard tool connection.
CONN_2_BOX_FLAG	Flag indicating if Connection 2 is a Box (Y) or a Pin (N).
CONN_2_OUTSIDE_DIAMETER	Outside diameter of tool joint/connection 2
CONN_2_SIZE	Size of the bottom or second standard tool connection.
CONN_2_THREAD_TYPE	Complete and non ambiguous identification of the second threaded connection, e.g., "Hydril Joint Type EIU", "Pittsburgh Special ACME-Thread Casing-Internal-upset"Description of the threaded connection
CONN_2_TYPE	Type of the bottom or second standard tool connection.
CONNECTEDNESS_COEFFICIENT	A coefficient describing the connectedness of items, such as the connectedness between inclusions (e.g. lenses) in the Earth subsurface formations.
CONSISTENCY_INDEX	The k parameter in the Power-Law and Herschel-Bulkley rheological models. The Power_Law model is "Shear_Stress=k times (Shear_Rate at the power of n)". The unit of k is traditionally lbf.sec^n/ft^2 or Pa.s^n.
CONTACT_SYMBOL	Symbol to post on the Feature_Boundary at the intersection point with another Feature_Boundary
CONTACT_TYPE	The type of contact or interface between Earth subsurface regions
CONTRACT_STATUS	Status of a contract.
COOLANT_TEMPERATURE	Temperature of the cooling fluid
CORE_BOX_COUNT	The number of core boxes containing samples from a cored borehole interval in a praticular well.
CORE_DATE	Date on which the core was recovered.
CORE_PRESERVATION_METHOD	Method by which a core sample has been preserved.
CORE_SIZE	The outer diameter of the core which is, or was intended to be retrieved from the cored interval.
CORING_FLUID_TYPE	The type of fluid that was in the borehole at the time the coring operation was in progress; e.g. water, brine, oil, mud, etc.
CORING_METHOD	The type of method used to acquire a core sample; e.g. Rotary Conventional, Rotary Sponge, Sidewall Mechanical, etc.
CORRELATION_COEFFICIENT	Coefficient of a correlation used to determine the quality of the correlation
CORROSION_RATE	The rate at which corrosion, a complex chemical or electrochemical process by which metal is destroyed, occurs. For example the rate at which a casing pipe rusts (corrodes).
CORROSIVE_FLUID_FLAG	Is the fluid corrosive? (Y/N) Used to apply a wall erosion model to measure the pipe wall thickness.
COST	Amount of money spent to obtain goods or services.
COST_PER_DEPTH	Amount of money per unit of length
COST_PER_VOLUME	Amount of money per unit of volume
COUNTRY_CODE	Catalog-controlled code of a Country.
COUNTY_CODE	Catalog-controlled code of a County or Parish.
CRITICAL_GAS_SATURATION	Critical Saturation for Gas
CRITICAL_OIL_SATURATION	Critical Saturation for Oil
CRITICAL_PRESSURE	The pressure needed to condense a vapor at its critical temperature. Applies to pure components; for mixtures use Pseudocritical_Pressure.
CRITICAL_TEMPERATURE	The highest temperature at which a fluid can exist as a liquid and above which its vapor cannot be liquefied regardless of the amount of pressure. Applies to pure components; for mixtures use Pseudocritical_Temperature.
CRITICAL_VOLUME	The inverse of density at the critical point of a fluid, describing the volume occupied by a fluid of unit mass.
CRITICAL_WATER_SATURATION	The highest water saturation a rock maintain while producing hydrocarbons before water will begin to flow.
CROSS_SECTION_AREA	The cross-sectional area of an object; e.g., area of perforation in a cased borehole.
CROSSFLOW_COEFFICIENT	Characterization of the flow in the reservoir from one layer to another layer, usually known as "Omega" in Reservoir Dynamics
CRUSHED_ZONE_PERMEABILITY	Permeability of the Crushed Zone around perforation
CRUSHED_ZONE_THICKNESS	Thickness of the Crushed Zone around perforation
CUMULATIVE_GAS_VOLUME	Cumulative gas production at standard conditions.
CUMULATIVE_OIL_VOLUME	Cumulative oil production at standard conditions.
CUMULATIVE_WATER_INFLUX	The cumulative volume of water that encroaches into a reservoir.
CUMULATIVE_WATER_VOLUME	Cumulative water production at standard conditions.
CURRENCY_CODE	Money currency (US$, French franc..)
CURVATURE	A measure of the degree to which a path is curved relative to the length of the path along the curve.
CYCLE_SAMPLE_COUNT	Target number of samples per hour.
CYCLIC_REDUNDANCY_CHECK	CRC test value for this Calibration Coefficient set.
DAILY_PROGNOSIS	Description of activities and events anticipated during the next 24 hours.
DAMAGED_ZONE_PERMEABILITY	Permeability of the near-wellbore Damaged Zone
DAMAGED_ZONE_THICKNESS	Thickness of the near-wellbore Damaged Zone
DATA_ACQUISITION_MODE	Software or hardware option whose selection controls some aspect of data acquisition.
DATA_DIRECTION	Direction of data flow, e.g. Input, Output or both.
DATA_REDUCTION_TYPE	Method used for data reduction, e.g. Linear decimation, Logarithmic, etc.
DEAD_VOLUME	Volume of material remaining in a container after normal emptying procedure, and thus not available for use.
DEAD_WEIGHT	Weight of material unavailable for use remaining in a container
DECIMATION_FACTOR	Number indicating the degree of data reduction from decimation (resampling at lower sampling frequency); e.g. a Decimation_Factor of 5 indicates that only every 5th input sample is retained as output.
DEGREE_OF_CONFIDENCE	The degree of confidence associated with any event or feature related to or detected, for example a geologic feature in/on the Earth (high, low, etc.)
DENSITY	The density (mass per unit volume) of a material. Usually at Standard conditions (STP). Also used to indicate the frequency of occurrence.
DENSITY_IN	Density of the input material, such as the drilling fluid in the mixing tank.
DENSITY_OUT	Density of the output fluid, such as the drilling fluid returning from the well annulus.
DEPOSITIONAL_ENVIRONMENT_TYPE	The type of deposition that has created a particular Earth environment, e.g. Reef, Beachrock, Pointbar, etc.
DEPTH	The perpendicular measurement downward from a surface. Also, the direct linear measurement from the point of viewing usually from front to back.
DERIVATIVE_MODEL	Derivative Model used in evaluating this Transient, e.g., Backward, Central, or Forward.
DERIVATIVE_TYPE	Type of derivative used in evaluating this transient.
DESCRIPTION	The description or complete definition of any data item or object
DEVIATION_SKIN	The skin effect caused by the well trajectory not being perpendicular to the bedding plane.
DEW_POINT_PRESSURE	The pressure at which a liquid phase condenses from a vaporous fluid in equilibrium at a given temperature.
DIAMETER	Diameter of an entity with a spherical or cylindrical shape, such as the borehole, an item of drillstring equipment, etc.
DIELECTRIC_CONSTANT	The ratio of the Permittivity of a material to that of free space.
DIFFERENTIAL_CALIPER	The difference between the actual borehole diameter and bit size.
DIFFERENTIAL_PRESSURE	The difference between the pressures of two systems, or between the pressures measured at different points in a system.
DIFFERENTIAL_SPEED	The differential speed between the bowl and the conveyor of a centrifuge.
DIFFUSIVITY	A measure of the tendency for diffusion to occur. See Hydraulic_Diffusivity.
DIGITAL_FILE_FORMAT_VERSION	Identification of the digital file format version (e.g., 3.0a). Note that this information is often encoded within the file.
DIMENSIONLESS_BOREHOLE_RADIUS	Dimensionless Borehole Radius ("rwD")
DIMENSIONLESS_BOUNDARY_DISTANCE	Distance to a boundary divided by wellbore radius
DIMENSIONLESS_CHANGING_STORAGE_PRESSURE	Dimensionless changing wellbore storage pressure ("CphiD")
DIMENSIONLESS_FRACTURE_CONDUCTIVITY	Ratio of fracture conductivity (fracture permeability x average width) to the (matrix permeability x fracture half_length) product. Standard industry acronym : "FCD", S.P.E. preferred form "CfD".
DIMENSIONLESS_INTERWELL_DISTANCE	Dimensionless inter-well distance for a horizontal interference test
DIMENSIONLESS_LAYER_DIFFUSIVITY	Ratio of layer storativity ratio to layer transmissibility ratio ("etaDj")
DIMENSIONLESS_RECTANGLE_LENGTH	Rectangle length divided by reference length ("BxD")
DIMENSIONLESS_RECTANGLE_WIDTH	Rectangle width divided by reference length ("ByD")
DIMENSIONLESS_WELL_X_POSITION	Well position expressed as fraction of rectangle length ("xbx")
DIMENSIONLESS_WELL_Y_POSITION	Well position expressed as fraction of rectangle width ("yby")
DIP_ANGLE	The maximum angle that a surface; e.g., a bedding or fault surface, makes with the horizontal, measured perpendicular to the strike direction of the structure and is measured in the vertical plane.
DIP_AZIMUTH	Azimuth of a dipping plane in the Earth subsurface, usually around borehole
DIP_NUMBER	An ordinal identifier that characterizes uniquely each dip
DIP_PATTERN_SHAPE	Shape of a dip pattern, e.g. Convex, Concave, etc.
DIP_QUALITY_CUTOFF	The lowest dip quality taken into account for an interpretation.
DIP_TYPE	The type of dipping associated with subsurface planes; e.g., Cross_Bedding, Fault, Fracture, Bed_Boundary, etc.
DIP_VALID_ZONE_TYPE	This property specifies whether the zone where the dips were computed corresponded to a Blank zone with no dips, a Mirror Image zone, or a borehole Washout zone.
DIRECTION_CHANNEL_TO_AXIS	Azimuth of the direction to a axis, usually pertaining to a sedimentary channel.
DIRECTION_CHANNEL_TO_FLOW	Azimuth of the direction to flow, usually pertaining to a sedimentary channel.
DIRECTION_CHANNEL_TO_LAND	Azimuth of the direction to land, usually pertaining to a sedimentary channel.
DIRECTION_CURRENT	The azimuth of the flow direction that insured transportation an deposition of the sediments.
DIRECTION_DOWNTHROWN_BLOCK	Azimuth of the direction to the downthrown block in case of faulting in the Earth subsurface.
DIRECTION_OVERTHRUST	Azimuth of the direction of overthrust in case of faulting in the Earth subsurface.
DIRECTION_TO_SOURCE	The direction from which sediments are brought
DIRECTIONAL_PERMEABILITY	An oriented permeability within a porous media, expressed either as horizontal (along the bedding plane of the stratum) or vertical (perpendicular to the bedding plane of the stratum), or within a coordinate system.
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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 [phiCth] 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 [phiCth].
STORATIVITY_THICKNESS_RATIO	Ratio of component storativity-thickness to total system storativity-thickness [phiCth(i) / phiCth(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/mn1/2
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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