WITSML- Catalog of Value Constrainted Types. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. Activity codes as defined by IADC. Move in, rig up, tear down and move out. Actually drilling on bottom. Reaming previously drilled hole. Actually coring on bottom, pulling wireline core, removing core, and servicing core equipment. Conditioning mud and circulating. Trips in or out of the hole. Normal lubrication and servicing of the rig. Only the actual time shut down for rig repairs. Show time required to cut the drilling line, and time to change drilling line. Time spent taking deviation survey. Rigging up, tearing down and running logging equipment. Rigging up to run casing and cementing, and tearing down cementing equipment. Time spent waiting for cement to set. Installing and removing blowout preventer equipment. Pressure testing blowout preventers. Making up drill stem test tool, conducting test, killing the well or reversing the test, and laying down test tool. Setting bridge plugs, cement retainers, and other plugs in casing or open hole for plugging back. Making up squeeze tool, conducting squeeze job, reversing cement, and laying down squeeze tool. Window by "Fishing" is to include actual hours in each tour from time fishing job occurs until normal operation is resumed. This time will not be added to the Time Distribution total of each tour since the time for actual operations conducted during the fishing job will be entered for the individual operations, and will have been explained elsewhere. Whipstock, jet deflection, downhole motor, or other directional work for the purpose of correcting the position or directional trend of the well bore. The north direction as defined by the magnetic north pole at the time of the measurement. The magentic north pole is the direction that a magnet will point to when freely rotating. The north direction is defined by the coordinate grid in the projection coordinate system. The north direction as defined by the true north pole. The true north pole is an average of the actual measured north axis, which is the axis of rotation of the earth. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. A list of binary representations for elements of aggregates which may be Base64-encoded (e. g. elements of well log array traces, or multiplexed frames of similar-typed well log traces) as described in "XML Schema Part 2: Datatypes", 3.2.16 base64binary [http://www.w3.org/TR/xmlschema-2/#base4Binary]] and in "Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies" (IETF RFC 2045) [ http://www.ietf.org/rfc/rfc2045.txt ]. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent a classification of a drill bit based on its reason for being declared inoperable, as originally defined by the IADC. Broken Cone Broken teeth/cutters Balled Up Cracked Cone Cone Dragged Cone Interference Cored Chipped Teeth Erosion Flat Crested Wear Heat Checking Junk Damage Lost Nozzle Lost Nozzle Lost Teeth/Cutters No Dull/No Other Wear Off-Center Wear Pinched Bit Plugged Nozzle Rounded Gauge Ring Out Shirttail Damage Self-Sharpening Wear Tracking WashOut on Bit Worn Teeth/Cutters The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the reason for pulling a drill bit from the wellbore, as originally defined by the IADC. Change Bottom Hole Assembly Condition Mud Core Point Downhole Motor Failure Drill Plug Drill Stem Test Downhole Tool Failure Formation Change Hole Problems Hours on Bit Run Logs Pump Pressure Penetration Rate Rig Repairs Total Depth/Casing Depth Torque Twist Off Weather Conditions The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of drill/core bit. Diamond bit Diamond core bit Insert roller cone bit PDC fixed cutter bit PDC core bit Milled tooth roller cone bit The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of Box/Pin configuration. Bottom box, top box Bottom box, top pin Bottom pin top box Bottom pin The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the position of a connection. The connection is the same at both ends of the component This connection is only at the bottom of the component This connection is only at the top of the component The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent method used to direct the deviation of the trajectory. Rotary Steerable System that deviates a wellbore by tilting the bit to point it in the desired direction. Rotary Steerable System that deviates a wellbore by inducing a side force to push the bit in the desired direction. These values represent the type of drilling derrick. 2 stand capacity derrick 4 stand capacity derrick Slant derrick 3 stand capacity derrick The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of work string drive (rotary system). Coiled tubing rig Kelly drive system Top Drive The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The type of local or permanent reference datum for vertical gravity based (i.e., elevation and vertical depth) and measured depth coordinates within the context of a well. This list includes local points (e.g., kelly bushing) used as a datum and vertical reference datums (e.g., mean sea level). casing flange: A flange affixed to the top of the casing string used to attach production equipment. crown valve derrick floor ground level kelly bushing rotary bushing rotary table sea floor Lowest Astronomical Tide. The lowest tide level over the duration of the National Tidal Datum Epoch (19 years). Mean Sea Level - A tidal datum. The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch (19 years). Mean Higher High Water - A tidal datum. The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch (19 years). Mean High Water - A tidal datum. The average of all the high water heights observed over the National Tidal Datum Epoch (19 years). Mean Lower Low Water - A tidal datum. The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch (19 years ). Mean Low Water - A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch (19 years). Mean Tide Level - A tidal datum. The arithmetic mean of mean high water and mean low water. Same as half-tide level. kickoff point The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of ellipsoid (spheroid) defining geographic or planar coordinates. Australian Old Modified Airy Airy 1830 Airy 1849 Australian National Same as KAU63 and SA69 Bessel Modified Bessel - NGO 1948 Bessel - RT90 Bessel 1841 Bessel 1841 for Namibia BOGOTA (International 1924) Clarke 1858 Clarke 1858-1 Clarke 1866 Clarke 1866 for Michigan Clarke 1880 Clarke 1880 variation A Clarke 1880 variation B Clarke 1880 IGN Clarke 1880 for Jamaica Clarke 1880 for Merchich Clarke 1880 for Palestine CAMPO INCH (International 1924) Danish DELAMBRE 1810 ED50 (International 1924) EGYPT07 (Helmert 1906) Everest 1830 - Indian Everest 1948 Everest 1956 Everest 1969 Everest Brunei Modified Everest Everest Pakistan Everest 1830 (modified) Timbalai Everest - Timbali "Fischer 1960 aka ""Mercury""" Fischer 1960 Modified "Fischer 1968 aka ""Modified Mercury""" "Modified Fischer 1960 aka ""South Asia""" GDA94 - Australia Geodetic Reference System 1967 Geodetic Reference System 1980 Hayford 1909 Heiskanen 1929 Helmert 1906 Helmert 1907 Hough 1956 IAG 75 INDIAN75 (Everest 1930) INDO74 (Indonesian 1974) International 1924 IUGG 1967 IUGG 1975 Jeffreys 1948 Kaula 1963 Same as AUST_NAT and SA69 Krassovsky MERIT83 NAD27 (Clarke 1866) NAHRAN (Clarke 1880) New International 1967 NWL 10D NWL 9D OSGB36 (Airy 1830) OSU86F OSU91A Plessis 1817 PSAD56 (International 1924) Pointe Noire 1948 South American 1969 Sphere of radius 6370997 Struve 1860 Walbeck War Office 1924 World Geodetic System 1960 World Geodetic System 1966 World Geodetic System 1972 World Geodetic System 1984 The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of geodetic datum. The source (except for "none", "unknown" and "UserDefined") of the values and the descriptions is Geoshare V13. Adindian ellipsoid=CL80 region="Sudan, Ethiopia" ARC 1950 ellipsoid=CL80B region="Southern Africa" Australian ellipsoid=GRS67 region="Australia Geodetic" Camp Area Astro ellipsoid=INT24 region=Antarctica Chau Astro ellipsoid=INT24 region=Paraguay Corrego Alegre ellipsoid=INT24 region=INT24 European 1950 ellipsoid=INT24 region="Europe, Middle East, North Africa" European 1987 ellipsoid=INT24 region="Europe, Middle East, North Africa" Ireland 1965 ellipsoid=AIRY_MOD region=Ireland Geodetic Datum 1949 ellipsoid=INT24 region="New Zealand" Ghana ellipsoid=WAR24 region=Ghana Guam 1963 ellipsoid=CL66 region="Marianas Islands" Hjorsey 1955 ellipsoid=INT24 region=Iceland Hu-Tzu-Shan ellipsoid=INT24 region=Taiwan Campo Inchauspe ellipsoid=INT24 region=Argentina Indian 'Kalimpur' ellipsoid=EVER region=India Indian 'Kalimpur' ellipsoid=INT24 region=India Indonesia 1974 ellipsoid=GRS67 region=Indonesia Liberia 1964 ellipsoid=CL80 region=Liberia Luzon ellipsoid=CL66 region=Philippines Merchich ellipsoid=CL80A region=Morocco North American 'Meades Ranch' ellipsoid=CL66 region="North America" North American Datum of 1983 ellipsoid=GRS80 region="Canada, Cuba, U.S., Caribbean" Nigeria ellipsoid=CL80 region=Nigeria Naparima ellipsoid=INT24 region="Trinidad and Tobago" Ordnance Survey of Great Britain 1936 ellipsoid=AIRY region="Great Britain, Northern Ireland" European 'Pelmert Tower, Potsdam' ellipsoid=INT24 region="Most of Eurasia, Africa" Russian 'Pulkovo' ellipsoid=BESS41 Russian 'Pulkovo' ellipsoid=KRSV Qornoq ellipsoid=INT24 region=Greenland Provisional South American, 1956 ellipsoid=INT24 region="Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela, the Guianas" Sierra Leone 1960 ellipsoid=CL80 region="Sierra Leone" Tananarive (Antananarivo) Obsv. 1925T ellipsoid=INT24 region="Malagasy Republic" Tokyo ellipsoid=BESS41 region=Japan Datum defined elsewhere Voirol ellipsoid=CL80 region="Algeria, Tunisia" World Geodetic System 1972 ellipsoid=WGS72 World Geodetic System 1984 ellipsoid=WGS84 region="Sino-Soviet Bloc, SW Asia, Hydrographic, Aeronautical" Yacare ellipsoid=INT24 region=Uruguay The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. Northern hemisphere. Southern hemisphere. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the state of a WITSML object. Actual data measured or entered at the well site. Model data used for "what if" calculations. A planned object. That is, one which is expected to be executed in the future. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. Specifies the source of lithology information. The lithology has one overall interpretation based on several sources such as logs and cuttings or cores. The lithology as based on a visual inspection of the core. A percentage is commonly assigned to each portion of the lithology. The lithology as based on a visual inspection of the cuttings. A percentage is commonly assigned to each portion of the lithology. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The type of lithology. The list of standard values is contained in the WITSML enumValues.xml file. The endcoding allowed in a realtime channel value or log curve value. Date with time data value. Double precision floating point value. Long integer data value. Character string data. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the direction of movement within a wellbore. Log items are in order of decreasing index values (e.g. wireline log logging while pulling out of hole) Log items are in order of increasing index values (e.g. increasing depths or times) The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. These values represent the type of data used as an index value for a log. Log is indexed on date with time. Log index is a measured depth index. Log index is a vertical depth depth index . Log is indexed on time. Any other index type for a log. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The data were read from a realtime sensor stream. The data are synthetic. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The value is not known. This value should not be used in normal situations. All reasonable attempts should be made to determine the appropriate value. Use of this value may result in rejection in some situations. The source (except for "CH density porosity", "CH neutron porosity", "OH density porosity" and "OH neutron porosity") of the values and the descriptions is the POSC V2.2 "well log trace class" standard instance values which are documented as "A classification of well log traces based on specification of a range of characteristics. Traces may be classed according to the type of physical characteristic they are meant to measure." Output from an accelerometer on a logging tool. A well log which uses an acoustic device to measure hole diameter. The signal measured by an acoustic device at the location of casing collars and other features (e.g., perforations). Seismic velocity multiplied by density. Porosity calculated from an acoustic log. The velocity of an acoustic wave. The time it takes for an acoustic wave to traverse a fixed distance of a given material or matrix. In this case the material or matrix is a specific, zero porosity rock, e.g. sandstone, limestone or dolomite. The time it takes for an acoustic wave to traverse a fixed distance. Any measurement of the maximum departure of a wave from an average value. The extent of departure of an acoustic wave measured from the mean position. The extent of departure of an electromagnetic wave measured from the mean position. The ratio of two amplitudes. A particular extent of space or surface. The amount of reduction in the amplitude of a wave. The amount of reduction in the amplitude of an acoustic wave. The amount of reduction in the amplitude of an electromagnetic wave. A general classification for measurements which are very specialized and not normally accessed by petrophysicists. The pore volume of a rock averaged using various well log or core porosity measurements. In the horizontal plane, it is the clockwise angle of departure from magnetic north (while looking down hole). A trace which has been corrected for the effects of barite in the borehole fluid. A trace which has been corrected for bed thickness effects. The diameter of the drill bit used to drill the hole. A well log trace which has been edited to reflect sharp bed boundaries. The trace has a square wave appearance. A trace which has been corrected for the effects of the borehole environment; e.g., borehole size. Deprecated. Use mud composition correction. A trace which has been corrected for the effects of borehole fluid; e.g., a mud cake correction. A trace which has been corrected for the effects of borehole size. A trace which has been corrected for the effects of bromide in the borehole fluid. The relative compressibility of a material. The measured density of a rock with the pore volume filled with fluid. The pore fluid is generally assumed to be water. A quantity per unit volume. The quantity of gas present in a unit volume of rock. The product of gas saturation and total porosity. The quantity of hydrocarbon present in a unit volume of rock. The product of hydrocarbon saturation and total porosity. The quantity of oil present in a unit volume of rock. The product of oil saturation and total porosity. The quantity of formation water present in a unit volume of rock. The product of water saturation and total porosity. The ratio of the Carbon measurement to the Oxygen measurement. A well log used to record hole diameter (open or cased). A trace which has been corrected for the effects of being recorded in a cased hole; e.g., corrected for casing weight and thickness. The signal measured by a device at the location of casing collars and other features (e.g., perforations). A trace which has been corrected for the effects of casing; this includes things such as casing weight, thickness and diameter. A trace which has been corrected for the effects of casing diameter. Any of the measurements made for the purpose of determining the properties of the well casing. A trace which has been corrected for the effects of casing thickness. A trace which has been corrected for the effects of casing weight. A trace which has been corrected for the effects of the cement surrounding the casing; this includes cement thickness, density and type. A trace which has been corrected for the effects of cement density. Any of the measurements made to determine the presence and quality of the cement bond to casing or to formation. A trace which has been corrected for the effects of cement thickness. A trace which has been corrected for the effects of the type of cement used. Porosity calculated from the bulk density measurement of a cased hole density log using a dolomite matrix density. Porosity calculated from a cased hole neutron log using a dolomite matrix. Porosity calculated from the bulk density measurement of a cased hole density log using a limestone matrix density. Porosity calculated from a cased hole neutron log using a limestone matrix. Porosity calculated from the bulk density measurement of a cased hole density log using a sandstone matrix density. Porosity calculated from an open hole neutron log using a sandstone matrix. Porosity calculated from a compressional wave acoustic log using a dolomite matrix. Porosity calculated from a compressional wave acoustic log using a limestone matrix The time it takes for a compressional acoustic wave to traverse a fixed distance of a given material or matrix. In this case the material or matrix is a specific, zero porosity rock, e.g. sandstone, limestone or dolomite. Porosity calculated from a compressional wave acoustic log using a sandstone matrix. The time it takes for a compressional acoustic wave to traverse a fixed distance. The property of a medium (solid or fluid) which allows the medium to conduct a form of energy; e.g., electrical conductivity or thermal conductivity. Conductivity calculated from the attenuation of an electromagnetic wave. Generally recorded from a LWD resistivity tool. Conductivity calculated from the phase shift of an electromagnetic wave. Generally recorded from a LWD resistivity tool. The conductivity of the water entrapped in the interstices of the rock. The resistivity of the water entrapped in the interstices of the rock. Porosity from a measurement made on a conventional core. The density of a rock matrix measured on a core sample. The permeability derived from a core. Porosity from a core measurement. A trace which has had corrections applied; e.g. environmental corrections. The rate of occurrences; e.g. the far counts from a density tool.. The ratio of two count rates. The pore volume of a rock calculated from cross plotting two or more well log porosity measurements. The time it takes for a population to decay, generally expressed as a half life. The conductivity which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. The conductivity, measured by an induction log, which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. The resistivity, measured by an induction log, which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. The conductivity, measured by a laterolog, which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. The resistivity, measured by a laterolog, which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. The resistivity which represents a measurement made several feet into the formation; generally considered a measurement of the undisturbed formation. Mass per unit Volume - well logging units are usually gm/cc. Porosity calculated using the bulk density measurement from a density log. The distance to a point in a wellbore. The process of depth correcting a trace by depth matching it to a reference trace. The depth calculated from velocity information. Departure of a borehole from vertical. Also, the angle measured between the tool axis and vertical. Relative permittivity. A trace which has been corrected for the effects of diffusion. The angle that a structural surface, e.g. a bedding or fault plane, makes with the horizontal, measured perpendicular to the strike of the structure. Any of a number of measurements produced by a tool designed to measure formation dip and borehole characteristics through direct and indirect measurements. The conductivity, measured by a dipmeter, which represents a measurement made approximately one to two feet into the formation; generally considered to measure the formation where it contains fluids which are comprised primarily of mud filtrate. The resistivity, measured by a dipmeter, which represents a measurement made approximately one to two feet into the formation; generally considered to measure the formation where it contains fluids which are comprised primarily of mud filtrate. Porosity calculated from an acoustic log using a dolomite matrix. Porosity calculated from the bulk density measurement of a density log using a dolomite matrix density. Porosity calculated from a neutron log using a dolomite matrix. A well log trace which has been corrected or adjusted through an editing process. The interconnected pore volume occupied by free fluids. The flow of electric charge. The difference in electrical energy between two systems. The time it takes for an electromagnetic wave to traverse a fixed distance of a given material or matrix. In this case the material or matrix is a specific, zero porosity rock, e.g. sandstone, limestone or dolomite. The time it takes for an electromagnetic wave to traverse a fixed distance. The elemental composition, generally in weight percent, of a formation as calculated from information obtained from a geochemical logging pass; e.g., weight percent of Al, Si, Ca, Fe, etc. The ratio of two different elemental measurements; e.g. K/U. A well log trace which has been filtered to improve its value; e.g. inverse filtering for better resolution. A well log trace which has had a filter applied to it. A logging tool to measure the rate and/or direction of fluid flow in a wellbore. The quantity per unit volume of fluid. The velocity of a flowing fluid. The amount of a fluid resistance to flow. The conductivity of the zone immediately behind the mud cake and which is considered to be flushed by mud filtrate, i.e., it is considered to have all mobile formation fluids displaced from it. The resistivity of the zone immediately behind the mud cake and which is considered to be flushed by mud filtrate, i.e., it is considered to have all mobile formation fluids displaced from it. The fraction or percentage of pore volume of rock occupied by drilling mud or mud filtrate in the flushed zone. Energy exerted or brought to bear. A trace which has been corrected for formation density effects. A trace which has been corrected for formation properties; e.g., salinity. A trace which has been corrected for the salinity effects from the water in the formation. A trace which has been corrected for formation saturation effects. A trace which has been corrected for the effects of the hydrocarbon formation volume factor. A trace which has been corrected for the effects of the density of the formation water. A trace which has been corrected for water saturation effects. The percent of the bulk volume occupied by fluids which are free to flow as measured by the nuclear magnetism log. A trace which has been corrected for the effects of friction. The measurement of naturally occurring Gamma Ray radiation being released by radioisotopes in clay or other minerals in the formation. The measurement of the naturally occurring gamma radiation less the radiation attributed to uranium. The fraction or percentage of pore volume of rock occupied by gas. The measurement of the average density of fluids in a wellbore. A measurement of the conductivity of the formation, by a high frequency electromagnetic tool, within the first few cubic inches of the borehole wall. High frequency electromagnetic measurements, e.g. from a dielectric logging tool. Porosity calculated using a high frequency electromagnetic measurement as input. The amount of change in the phase of a high frequency electromagnetic wave. A measurement of the resistivity of the formation, by a high frequency electromagnetic tool, within the first few cubic inches of the borehole wall. A trace which has been corrected for the effects of hydrocarbons. A trace which has been corrected for the effects of hydrocarbon density. A trace which has been corrected for the effects of hydrocarbon gravity. The fraction or percentage of pore volume of rock occupied by hydrocarbon. A trace which has been corrected for the effects of hydrocarbon viscosity. The likeness of an object produced by an electrical device. A variable in a well log interpretation equation. A trace which has been corrected for the effects of iron in the borehole fluid. A well log trace which has had two or more runs spliced together to make a single trace. A trace which has been corrected for the effects of KCl in the borehole fluid. A measured distance or dimension. Porosity calculated from an acoustic log using a limestone matrix. Porosity calculated from the bulk density measurement of a density log using a limestone matrix density. Porosity calculated from a neutron log using a limestone matrix. A trace which has been corrected for lithology effects. The permeability derived from a well log. The density of a rock matrix used with, or derived from, the bulk density from a well log. The matrix is assumed to have zero porosity. The signal measured by a magnetic device at the location of casing collars and other features (e.g., perforations). The density of a rock matrix. In this case, the matrix is assumed to have zero porosity. The time it takes for an electromagnetic or acoustic wave to traverse a fixed distance of a given material or matrix. In this case the material or matrix is a specific, zero porosity rock, e.g. sandstone, limestone or dolomite. The distance measured along the path of a wellbore. A well log which uses a mechanical device to measure hole diameter. The signal measured by a mechanical device at the location of casing collars and other features (e.g., perforations). The conductivity which represents a measurement made approximately two to three feet into the formation; generally considered to measure the formation where it contain fluids which are a mixture of mud filtrate, connate water and possibly hydrocarbons. The conductivity, made by an induction log, which represents a measurement made approximately two to three feet into the formation. The resistivity, made by an induction log, which represents a measurement made approximately two to three feet into the formation. The conductivity, measured by a laterolog, which represents a measurement made approximately two to three feet into the formation. The resistivity, measured by a laterolog, which represents a measurement made approximately two to three feet into the formation. The resistivity which represents a measurement made approximately two to three feet into the formation; generally considered to measure the formation where it contain fluids which are a mixture of mud filtrate, connate water and possibly hydrocarbons. A measurement of the conductivity of the formation within the first few cubic inches of the borehole wall. A conductivity measurement made by a micro log tool which measures within the first few cubic inches of the borehole wall. A resistivity measurement made by a micro log tool which measures within the first few cubic inches of the borehole wall. A measurement of the conductivity of the formation, by a laterolog, within the first few cubic inches of the borehole wall. A measurement of the resistivity of the formation, by a laterolog, within the first few cubic inches of the borehole wall. A conductivity measurement made by a micro log tool which measures within the first few cubic inches of the borehole wall. A resistivity measurement made by a micro log tool which measures within the first few cubic inches of the borehole wall. A measurement of the resistivity of the formation within the first few cubic inches of the borehole wall. A measurement of the conductivity of the formation, by a spherically focused tool, within the first few cubic inches of the borehole wall. A measurement of the resistivity of the formation, by a spherically focused tool, within the first few cubic inches of the borehole wall. The mineral composition, generally in weight percent, of a formation as calculated from elemental information obtained from a geochemical logging pass; e.g., weight percent of dolomite, calcite, illite, quartzite, etc. The conductivity of the filter cake, the residue deposited on the borehole wall as mud loses filtrate into porous and permeable rock. A trace which has been corrected for the effects of mud cake; e.g., mud cake thickness and/or density. A trace which has been corrected for the effects of mud cake density. The resistivity of the filter cake, the residue deposited on the borehole wall as mud loses filtrate into porous and permeable rock. A trace which has been corrected for the effects of mud cake resistivity. A trace which has been corrected for the effects of mud cake thickness. A trace which has been corrected for the effects of borehole fluid composition; e.g., a correction for KCl in the borehole fluid. The conductivity of the continuous phase liquid used for the drilling of the well. The conductivity of the effluent of the continuous phase liquid of the drilling mud which permeates porous and permeable rock. A trace which has been corrected for the effects of mud filtrate. This includes things such as filtrate salinity. A trace which has been corrected for the effects of mud filtrate density. The resistivity of the effluent of the continuous phase liquid of the drilling mud which permeates porous and permeable rock. A trace which has been corrected for the effects of mud filtrate resistivity.