Table T4. Acronyms and units for wireline 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) | inch | |
| DIT-E | Dual Iduction Tool | ||
| IDPH | Deep induction resistivity | Ω·m | |
| IMPH | Medium induction resistivity | Ω·m | |
| SFLU | Spherically focused resistivity | Ω·m | |
| 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 | ||
| 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 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 | |
| NGT | Natural Gamma Ray Spectrometry Tool | ||
| SGR | Standard total gamma ray | gAPI | |
| CGR | Computed gamma ray (SGR minus uranium contribution) | gAPI | |
| POTA | Potassium | wt% | |
| THOR | Thorium | ppm | |
| URAN | Uranium | ppm | |
| MGT | Multi-Sensor Spectral Gamma Ray Tool | ||
| GR | Total gamma ray | gAPI | |
| TAP | Temperature/Acceleration/Pressure tool | °C, m/s2, psi |
Notes: All tool and tool string names (except the TAP and MGT) are trademarks of Schlumberger. For the complete list of acronyms used in IODP and for additional information about tool physics and use, consult IODP-USIO Science Services, LDEO, at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html.
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