Table T4. 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 (distance from borehole wall) | in | |
| 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 delay time (Δt) | ms/ft | |
| DTSM | Shear wave delay time (Δt) | ms/ft | |
| DTST | Stoneley wave delay time (Δt) | ms/ft | |
| FMS | Formation MicroScanner | ||
| C1, C2 | Orthogonal hole diameters | inch | |
| 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 | |
| HLDT | Hostile Environment Litho-Density Tool | ||
| RHOB | Bulk density (corrected) | g/cm3 | |
| PEF | Photoelectric effect | b/e– | |
| CALI | Caliper (measure of borehole diameter) | inch | |
| DRHO | 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 | |
| QSST | Inline Check shot Tool | ||
| SGT | Scintillation Gamma Ray Tool | ||
| ECGR | Environmentally corrected gamma ray | gAPI | |
| TAP | Temperature/Acceleration/Pressure tool | °C, m/s2, psi | |
| WST | Well Seismic Tool | ||
| Acoustic arrival times | ms |
Notes: All tool and tool string names (except the TAP and MGT) 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 Downhole Logging Tools at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html.
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