description: Remarks: Fundamental point: Maniyur. Latitude: 31Deg 23Min 59.19Sec N; Longitude: 48Deg 32Min 31.38Sec E (of Greenwich). Network included in Nahrwan 1967 adjustment.; Info source: IOEPC records.
description: The variation of the magnetic field from horizontal, measured as an angle being zero for horizontal field lines, and varying between 0 and 90 dega.
status: current
source: ref_source.name --> POSC
version: ref_epicentre_version.name --> 2.2.2
Add: ref_coordinate_transformation
kind:mathematical
description: Basic mathematical transformations: polar, cylindrical, spherical, and their inverses.
status: current
source: ref_source.name --> POSC
version: ref_epicentre_version.name --> 2.2.2
Add: coordinate_transformation_method
identifier:polar
description: A transformation between a rectangular and a polar coordinate system. It is explicitly a mapping from R2 to R2. There are no parameters.
description: A transformation between a rectangular and a cylindrical coordinate system. It is explicitly a mapping from R3 to R3. There are no parameters.
description: A transformation between a rectangular and a cylindrical coordinate system. It is explicitly a mapping from R3 to R3. There are no parameters.
description: A standard mapping from a rectangular (x,y) coordinate system to a polar (r,theta) for which r = sqrt(x-squared + y-squared) and theta = arctan(y/x), where the usual branch cut is 0 <= theta < 360 dega.
description: A standard mapping from a polar (r,theta) coordinate system to a rectangular (x,y) coordinate system for which x = r*cos(theta), y = r*sin(theta).
description: A standard mapping from a rectangular (x,y,z) coordinate system to a cylindrical (r,theta,z) for which r = sqrt(x-squared + y-squared) and theta = arctan(y/x), where the usual branch cut is 0 <= theta < 360 dega, and z = z.
description: A standard mapping from a polar (r,theta,z) coordinate system to a rectangular (x,y,z) coordinate system for which x = r*cos(theta), y = r*sin(theta), z=z.
description: A standard mapping from a rectangular (x,y,z) coordinate system to a spherical (rho,theta,phi) coordinate system, for which rho = sqrt(x-squared + y-squared + z-squared), theta = arctan(y/x), where the usual branch cut is 0 <= theta < 360 dega, and phi = arctan(z/r) where 0 < phi < 90 dega, and r = sqrt(x-squared + y-squared).
description: A standard mapping from a spherical (rho,theta,phi) coordinate system to a rectangular (x,y,z) coordinate system for which, if we set r = rho*cos(phi), we have x = r*cos(theta), y = r*sin(theta), and z = rho*sin(phi).
description: The mass in grams of a substance produced or consumed during electrolysis by 1 faraday (96487 Coulombs) of charge. For an element or compound, it is simply the gram-equivalent-weight of the substance (gram-molecular-weight divided by the number of electrons participating in the electrolysis (for elements, the valence)).
description: A well log trace has been processed in some way; e.g., depth adjusted or environmentally corrected.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:depth adjusted
description: The process of depth correcting a trace by depth matching it to a reference trace.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:joined
description: A well log trace has had two or more runs spliced together to make a single trace.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:edited
description: A well log trace has been corrected or adjusted through an editing process.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:blocked
description: A well log trace has been edited to reflect sharp bed boundaries. The trace has a square wave appearance.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:shifted
description: A well log trace has had its original values shifted by some factor; e.g., added or multiplied by a constant.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:filtered
description: A well log trace has had a filter applied to it.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:smoothed
description: A well log trace has been filtered to smooth, or average the trace.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:enhanced
description: A well log trace has been filtered to improve its value; e.g. inverse filtering for better resolution.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:corrected
description: A trace has had corrections applied; e.g. environmental corrections.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:bed thickness correction
description: A trace has been corrected for bed thickness effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation properties correction
description: A trace has been corrected for formation properties; e.g., salinity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:lithology correction
description: A trace has been corrected for lithology effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:porosity correction
description: A trace has been corrected for porosity effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:resistivity factor correction
description: A trace has been corrected for resistivity factor effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation density correction
description: A trace has been corrected for formation density effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation saturation correction
description: A trace has been corrected for formation saturation effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation water saturation correction
description: A trace has been corrected for water saturation effects.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation salinity correction
description: A trace has been corrected for the salinity effects from the water in the formation.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation water density correction
description: A trace has been corrected for the effects of the density of the formation water.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:hydrocarbon correction
description: A trace has been corrected for the effects of hydrocarbons.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:hydrocarbon density correction
description: A trace has been corrected for the effects of hydrocarbon density.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:hydrocarbon viscosity correction
description: A trace has been corrected for the effects of hydrocarbon viscosity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:hydrocarbon gravity correction
description: A trace has been corrected for the effects of hydrocarbon gravity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:formation volume factor correction
description: A trace has been corrected for the effects of the hydrocarbon formation volume factor.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:physical measurement correction
description: A trace has been corrected for various physical measurement effects; e.g. spreading loss.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:spreading loss correction
description: A trace has been corrected for the effects of spreading loss.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:diffusion correction
description: A trace has been corrected for the effects of diffusion.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:water holdup correction
description: A trace has been corrected for water holdup.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:slippage velocity correction
description: A trace has been corrected for slippage velocity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:friction effect correction
description: A trace has been corrected for the effects of friction.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:tool diameter correction
description: A trace has been corrected for the tool diameter.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:borehole environment correction
description: A trace has been corrected for the effects of the borehole environment; e.g., borehole size.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:borehole size correction
description: A trace has been corrected for the effects of borehole size.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:borehole fluid correction
description: A trace has been corrected for the effects of borehole fluid; e.g., a mud cake correction.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud cake correction
description: A trace has been corrected for the effects of mud cake; e.g., mud cake thickness and/or density.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud cake thickness correction
description: A trace has been corrected for the effects of mud cake thickness.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud cake resistivity correction
description: A trace has been corrected for the effects of mud cake resistivity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud cake density correction
description: A trace has been corrected for the effects of mud cake density.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud filtrate correction
description: A trace has been corrected for the effects of mud filtrate. This includes things such as filtrate salinity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud filtrate resistivity correction
description: A trace has been corrected for the effects of mud filtrate resistivity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud filtrate density correction
description: A trace has been corrected for the effects of mud filtrate density.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud filtrate salinity correction
description: A trace has been corrected for the effects of mud filtrate salinity.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud composition correction
description: A trace has been corrected for the effects of borehole fluid composition; e.g., a correction for KCl in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:water based fluid correction
description: A trace has been corrected for the effects of the components in a water based borehole fluid system; e.g., a correction for KCL in the mud.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:KCl mud correction
description: A trace has been corrected for the effects of KCl in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:barite mud correction
description: A trace has been corrected for the effects of barite in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:iron mud correction
description: A trace has been corrected for the effects of iron in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:bromide mud correction
description: A trace has been corrected for the effects of bromide in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:oil based mud correction
description: A trace has been corrected for the effects of oil based borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud weight correction
description: A trace has been corrected for the effects of weighting the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud viscosity correction
description: A trace has been corrected for the effects of the viscosity of the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:mud salinity correction
description: A trace has been corrected for the effects of salinity in the borehole fluid.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:temperature correction
description: A trace has been corrected for the effects of the temperature in the borehole.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:pressure correction
description: A trace has been corrected for the effects of pressure in the borehole.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:tool eccentricity correction
description: A trace has been corrected for the effects of the tool not being centered in the borehole.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:cased hole correction
description: A trace has been corrected for the effects of being recorded in a cased hole; e.g., corrected for casing weight and thickness.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:casing correction
description: A trace has been corrected for the effects of casing; this includes things such as casing weight, thickness and diameter.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:casing thickness correction
description: A trace has been corrected for the effects of casing thickness.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:casing weight correction
description: A trace has been corrected for the effects of casing weight.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:casing diameter correction
description: A trace has been corrected for the effects of casing diamter.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:cement correction
description: A trace has been corrected for the effects of the cement surrounding the casing; this includes cement thickness, density and type.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:cement thickness correction
description: A trace has been corrected for the effects of cement thickness.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:cement density correction
description: A trace has been corrected for the effects of cement density.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:cement type correction
description: A trace has been corrected for the effects of the type of cement used.
classification_system: classification_system.name --> POSC well log trace activity
source: ref_source.name --> POSC
status: provisional
version: ref_epicentre_version.name --> 2.2.2
Add: activity_class
name:synthetic well log trace generation
description: A well log trace has been artificially created, as opposed to an actual measurement, from associated measurements or information.
classification_system: classification_system.name --> POSC well log trace activity