Table T24. Acronyms and units used for wireline logging tools.
Tool | Output | Tool name/Explanation of output | Unit |
---|---|---|---|
APS |
|
Accelerator Porosity Sonde |
|
|
FPLC | Far array porosity (limestone calibrated) | % |
|
APLC | Near array porosity (limestone calibrated) | % |
|
SIGF | Formation capture cross section (Σf) | Capture units |
|
STOF | Tool standoff (computed distance from borehole wall) | Inches |
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 |
|
|
|
Spatially oriented resistivity images of borehole wall |
|
GPIT |
|
General Purpose Inclinometer Tool |
|
|
DEVI | Hole deviation | Degrees |
|
HAZI | Hole azimuth | Degrees |
|
RB | Relative bearing | Degrees |
|
P1ZA | Pad 1 azimuth | Degrees |
|
ANOR | Acceleration computer norm | m/sec2 |
|
FINC | Magnetic field inclination | Degrees |
|
FNOR | Intensity of the total magnetic field | oers |
HLDS |
|
Hostile Environment Litho-Density Sonde |
|
|
RHOM | Bulk density | g/cm3 |
|
PEFL | Photoelectric effect | b/e– |
|
LCAL | Caliper (measure of borehole diameter) | Inches |
|
DRH | Bulk density correction | g/cm3 |
|
DPO | Density porosity | % |
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 |
LEH-MT |
|
Logging Equipment Head—Mud Temperature |
|
|
SP | Spontaneous potential | mV |
|
CTEM | Temperature | Degrees |
|
DHF | Downhole force | N |
QAIT |
|
SlimXtreme Array Induction Tool |
|
|
AIT10 | Resistivity with a median radial depth of investigation of 10 inches | Ω·m |
|
AIT20 | Resistivity with a median radial depth of investigation of 20 inches | Ω·m |
|
AIT30 | Resistivity with a median radial depth of investigation of 30 inches | Ω·m |
|
AIT60 | Resistivity with a median radial depth of investigation of 60 inches | Ω·m |
|
AIT90 | Resistivity with a median radial depth of investigation of 90 inches | Ω·m |
SGT |
|
Scintillation Gamma Ray Tool |
|
|
GR | Total gamma ray | gAPI |
|
ECGR | Environmentally corrected total gamma ray | gAPI |
|
EHGR | High-resolution environmentally corrected total gamma ray | gAPI |
UBI |
|
Ultrasonic Borehole Imager |
|
|
FTDE | Internal radius | Inches |
|
TTBK | Transit times | µs |
|
AWAV | Amplitude average | db |
Notes: All tool and tool string names presented in this table are trademarks of Schlumberger. For the complete list of acronyms used in IODP and for additional information consult IODP Downhole Logging Tools at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html.
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