Previous   |    Close

Table T7. Acronyms and units used for downhole wireline tools and measurements. (See table note.)

Tool Output Description Unit
APS   Accelerator Porosity Sonde  
APLC Near/Array limestone porosity corrected %
STOF Computed standoff Inch
SIGF Formation capture cross section Capture units
DIT   Dual Induction Tool  
IDPH Deep induction resistivity Ωm
IMPH Medium induction resistivity Ωm
SFLU Spherically focused resistivity Ωm
DSI   Dipole Sonic Imager  
DTCO Compressional wave slowness (Δt) µs/ft
DTSM Shear wave slowness (Δt) µs/ft
FMS   Formation MicroScanner  
C1, C2 Orthogonal hole diameters Inch
P1AZ Pad 1 azimuth %
  Spatially oriented resistivity images of borehole wall
GPIT   General Purpose Inclinometer Tool  
DEVI Hole deviation %
HAZI Hole azimuth %
Fx, Fy, Fz Earth’s magnetic field (three orthogonal components) %
Ax, Ay, Az Acceleration (three orthogonal components) m/s2
HLDS   Hostile Environment Litho-Density Sonde  
RHOM Bulk density g/cm3
PEFL Photoelectric effect b/e
LCAL Caliper (measure of borehole diameter) Inch
DRH Bulk density correction g/cm3
HNGS   Hostile Environment Natural 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
SGT   Scintillation Gamma Ray Tool  
GR Total gamma ray gAPI
ECGR Environmentally-corrected gamma ray gAPI
EHGR High-resolution environmentally-corrected gamma ray gAPI
VSI   Versatile Seismic Imager  
  Acoustic travel time ms

Note: For the complete list of acronyms used in IODP and for additional information about tool physics, consult IODP-USIO Science Services, LDEO, at iodp.ldeo.columbia.edu/​TOOLS_LABS/​tools.html.

Previous   |    Close   |    Top of page