Table T9. Acronyms used for the wireline tool strings and their measurements.

Tool
Output
Explanation
Units
HNGS
Hostile environment natural gamma-ray sonde

HSGR Standard (total) gamma ray gAPI

HCGR Computed gamma ray (HSGR - uranium contribution) gAPI

HFK Formation potassium Fraction

HTHO Thorium ppm

HURA Uranium ppm
NGT
Natural gamma-ray tool

SGR Standard total gamma ray gAPI

CGR Computed gamma ray (SGR minus uranium contribution) gAPI

POTA Potassium %

THOR Thorium ppm

URAN Uranium ppm
APS
Accelerator porosity sonde

APLC Near array porosity (limestone corrected) Fraction

FPLC Far array porosity (limestone corrected) Fraction

SIGF Neutron capture cross section of the formation (Sf) Formation capture cross section (CU)

STOF Tool standoff (computed distance from borehole wall) In
HLDS
High-temperature lithodensity sonde

RHOM Bulk density (corrected) g/cm3

PEFL Photoelectric effect barn/e-

LCAL Caliper - measure of borehole diameter In

DRH Bulk density correction g/cm3
DIT
Dual induction tool
SFR
Spherically focused resistivity

IDPH Deep Induction phasor-processed resistivity m

IMPH Medium induction phasor-processed resistivity m

SFLU Shallow spherically focused resistivity m
GHMT
Geologic magnetic tool

MAGS Magnetic susceptibility (limited range) ppm

RMGS Low resistivity magnetic susceptibility (wider range) ppm

MAGC Earth conductivity ppm

MAGB Earth total magnetic field nT
DSI
Dipole shear sonic imager

DTCO Compressional wave transit time s/ft

DTSM Shear wave transit time s/ft

DTST Stoneley wave transit time s/ft
TAP
High resolution temperature/acceleration/pressure tool C, m/s2, psi
GPIT
General purpose inclinometer cartridge

FX, FY, FZ Magnetic field (3 orthogonal directions) nT

AX, AY, AZ Acceleration (3 orthogonal directions) m/s2

Note: gAPI = American Petroleum Institute measurement for gamma ray.