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Table T4. Wireline logging tool acronyms, descriptions, and units. (See table note.)

Tool Output Tool name/description Unit
TLD   Three-Detector Lithology Density  
PEFZ Standard resolution formation photoelectric factor b/e
RHOZ Standard resolution formation density g/cm3
HGNS   Highly Integrated Gamma Ray Neutron Sonde  
TNPH Thermal neutron porosity m3/m3
NPHI Thermal neutron porosity (ratio method) m3/m3
NPOR Enhanced thermal neutron porosity m3/m3
HRLA   High-Resolution Laterolog Array  
RT_HRLT HRLT computed true resistivity Ωm
RXO_HRLT HRLT computed invaded zone resistivity Ωm
RLA0, 1, 2, 3, 4, 5, HRLT borehole corrected resistivity (0, 1, 2, 3, 4, 5) Ωm
RM_HRLT HRLT mud resistivity Ωm
GR Total natural gamma radiation gAPI
EMS   Environmental Measurement Sonde  
HD1, 2, 3 Hole diameter (1, 2, 3) inch
TMP Mud temperature °C
REMS Mud resistivity Ωm
MCFL   Micro-Cylindrically Focused Log  
RXOZ MCFL standard resolution invaded zone resistivity Ωm
FMI   Formation MicroImager  
C1, C2 Orthogonal hole diameter inch
P1AZ Pad 1 azimuth °
FC A(1–4), B(1–4), C(1–4), D(1–4) FMI buttons, Pads A–D, rows 1–4  
GPIT   General Purpose Inclinometry tool  
DEVI Hole deviation °
HAZI Hole azimuth °
Fx, Fy, Fz Magnetometer (x-, y-, z-) axis A/m
Ax, Ay, Az Acceleration (three orthogonal components) m/s2
Sonic Scanner      
DTCO Δt compressional µs/ft
DTSM Δt shear µs/ft
PPC   Power Positioning Device and Caliper Tool  
HD1, 2_PPC1 Hole diameter 1, 2 inch
HNGS   Hostile Environment Natural Gamma Ray Sonde  
HSGR HNGS standard gamma ray gAPI
HCGR HNGS computed gamma ray (HSGR minus uranium) gAPI
HFK Formation potassium concentration %
HTHO Formation thorium concentration %
HURA Formation uranium concentration %

Note: HRLT = High Resolution Laterolog Array Tool.

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