Previous   |   Close  

Table T12. Acronyms and units used for downhole wireline tools and measurements. (See table notes.)

Tool Output Explanation Unit
APS   Accelerator Porosity Sonde  
APLC Near array porosity (limestone calibrated) %
SIGF Formation capture cross-section (Σf) Capture units
STOF Tool standoff (computed distance from borehole wall) Inch
DITE   Dual Induction Tool model E  
IDPH Deep induction resistivity Ωm
IMPH Medium induction resistivity Ωm
SFLU Spherically focused resistivity Ωm
DSI   Dipole Sonic Imager  
DTCO Compressional wave delay time (Δt) µs/ft
DTSM Shear wave delay time (Δt) µs/ft
DTST Stoneley wave delay time (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 Inclinometry Tool  
DEVI Hole deviation °
HAZI Hole azimuth °
Fx, Fy, Fz Earth's magnetic field (three orthogonal components) Oe
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
UBI   Ultrasonic Borehole Imager  
TTAV Transit time average µs
AWAV Amplitude average db
BRAC Radii average Inch
  Spatially oriented acoustic images of borehole wall  

Notes: 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