Table
T14. Logging tool and measurement acronyms and units of measurement.
Tool
Output
Explanation
Units
HNGS
Hostile
environment natural gamma-ray sonde
HSGR
Standard
(total) gamma ray
gAPI
HCGR
Computed
gamma ray (HSGR minus uranium contribution)
gAPI
HFK
Formation
potassium
%
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)
%
FPLC
Far
array porosity (limestone corrected)
%
SIGF
Neutron
capture cross section of the formation (Sf)
cu
(capture units)
STOF
Tool
standoff (computed distance from borehole wall)
in
HLDS
High
temperature lithodensity sonde
RHOM
Bulk
density (corrected)
g/cm3
PEFL
Photoelectric
effect factor
barn/e-
LCAL
Caliper
measure of borehole diameter
in
DRH
Bulk
density correction
g/cm3
DLL
Dual
laterolog
LLD
Deep
laterolog
m
LLS
Shallow
laterolog
m
DITE-SFR
Dual
induction tool-spherically focused resistivity tool
IDPH
Phasor
deep induction
m
IMPH
Phasor
medium induction
m
SFLU
Shallow
spherically focused log
m
TAP
High
resolution temperature/acceleration/pressure tool
T,
A, P
Temperature/acceleration/pressure
°C,
mm/s2, psi
DSI
Dipole
shear sonic imager
Vp
Compressional
wave velocity
m/s
Vs
Shear
wave velocity
m/s
LSS
Long-spaced
sonic tool
Vp
Compressional
wave velocity
m/s
FMS
Formation
MicroScanner
Resistivity
image
GPIT
General
purpose inclinometer tool
Hazi
Hole
azimuth
°
FNOR
Intensity
of the total magnetic field
oer
(oersted)
WST
Well
seismic tool
t
Acoustic
arrival time
µs