Table T17. 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 (Σf) | Capture units | |
| STOF | Tool standoff (computed distance from borehole wall) | Inches | |
| DLL | Dual Laterolog | ||
| LLD | Deep resistivity | Ωm | |
| LLS | Shallow resistivity | Ωm | |
| DSI | Dipole Sonic Imager | ||
| DTCO | Compressional wave delay time (Δt) | ms/ft | |
| DTSM | Shear wave delay time (Δt) | ms/ft | |
| DTST | Stoneley wave delay time (Δt) | ms/ft | |
| EMS | Environment Measurement Sonde | ||
| TMP | Fluid temperature | °C | |
| REMS | Fluid electrical resistivity | Ωm | |
| FMS | Formation MicroScanner | ||
| C1, C2 | Orthogonal hole diameters | Inches | |
| 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 | |
| HLDS | Hostile Environment Litho-Density Tool | ||
| RHOM | Bulk density | g/cm3 | |
| PEFL | Photoelectric effect | b/e– | |
| LCAL | Caliper (measure of borehole diameter) | inches | |
| 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 | |
| SGT | Scintillation Gamma Ray Tool | ||
| ECGR | Environmentally corrected gamma ray | gAPI | |
| TAP | Temperature/Acceleration/Pressure tool | °C, m/s2, psi | |
| UBI | Ultrasonic Borehole Imager | ||
| Spatially oriented acoustic images of borehole wall | |||
| Acoustic arrival times and amplitude | ms | ||
| Borehole diameter | Inches | ||
| Borehole azimuth | Degrees | ||
| VSI | Versatile Seismic Imager | ||
| Acoustic arrival times | ms | ||
| WST | Well Seismic Tool | ||
| Acoustic arrival times | ms |
Notes: All tool and tool string names (except the TAP) are trademarks of Schlumberger. For the complete list of acronyms used in the IODP and for additional information about tool physics and use consult IODP Logging Services at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html.
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