Table T15. Acronyms and units used for wireline logging tools.
Tool
Output
Tool name/Explanation of output
Unit
APS
Accelerator Porosity Sonde

APLC Near array porosity (limestone calibrated) %

SIGF Formation capture cross section (f) Capture units

STOF Tool standoff (computed distance from borehole wall) in
DIT
Dual Induction Tool

IDPH Deep induction resistivity m

IMPH Medium induction resistivity m

SFLU Spherically focused resistivity m
FMS
Formation MicroScanner

C1, C2 Orthogonal hole diameters in

P1AZ Pad 1 azimuth Degrees


Spatially oriented resistivity images of borehole wall
GPIT
General Purpose Inclinometer Tool

DEVI Hole deviation Degrees

HAZI Hole azimuth Degrees

Fx, Fy, Fz Earth's magnetic field (three orthogonal components) Oersted

Ax, Ay, Az Acceleration (three orthogonal components) m/s2
HLDT
Hostile Environment Litho-Density Tool

RHOM Bulk density g/cm3

PEFL Photoelectric effect b/e

LCAL Caliper (measure of borehole diameter) in

DRH Bulk density correction g/cm3
HNGS
Hostile Environment Gamma Ray Sonde

HSGR Standard (total) gamma ray gAPI

HCGR Computed gamma ray (HSGR minus uranium contribution) gAPI

HFK Potassium wt%

HTHO Thorium ppm

HURA Uranium ppm
LSS
Long Spacing Sonic tool

DT Short-spacing delay time (t) s/ft

DTL Long-spacing delay time (t) s/ft
MGT
Multi-Sensor Spectral Gamma Ray Tool

GR Total gamma ray gAPI

POTA Potassium wt%

THOR Thorium ppm

URAN Uranium ppm
SGT
Scintillation Gamma Ray Tool

ECGR Environmentally corrected gamma ray gAPI
TAP
Temperature/Acceleration/Pressure tool C, m/s2, psi
WST
Well Seismic Tool


Acoustic arrival times ms

Notes: All tool and tool string names (except the TAP and MGT) are trademarks of Schlumberger. For the complete list of acronyms used in the ODP and for additional information about tool physics and use consult ODP Logging Services at www.ldeo.columbia.edu/BRG/ODP.