Table T5. Definitions of acronyms used to describe wireline tool strings and individual tool names.
|
Tool
|
Output
|
Definition
|
Unit
|
|---|---|---|---|
| HNGS | Hostile environment natural gamma-ray sonde | ||
| HSGR | Standard (total) gamma ray | gAPI | |
| HCGR | Computed gamma ray (HSGR - uranium contribution) | gAPI | |
| HFK | Formation potassium | % | |
| HTHO | Thorium | ppm | |
| HURA | Uranium | ppm | |
| NGT | Natural gamma-ray tool | ||
| SGR | Standard total gamma ray | gAPI | |
| CGR | Computed gamma ray (SGR - uranium contribution) | gAPI | |
| POTA | Potassium | % | |
| THOR | Thorium | ppm | |
| URAN | Uranium | ppm | |
| APS | Accelerator porosity sonde | ||
| APLC | Near array porosity (limestone corrected) | Fraction | |
| FPLC | Far array porosity (limestone corrected) | Fraction | |
| SIGF | Neutron
capture cross section of the formation ( f) |
capture units | |
| STOF | Tool standoff (computed distance from borehole wall) | In | |
| HLDS | Hostile environment lithodensity sonde | ||
| RHOM | Bulk density (corrected) | g/cm3 | |
| PEFL | Photoelectric effect | barn/e- | |
| LCAL | Caliper—measure of borehole diameter | In | |
| DRH | Bulk density correction | g/cm3 | |
| DIT | Phasor dual-induction/spherically focused tool | ||
| SFR | Spherically focused resistivity | ||
| IDPH | Deep induction phasor-processed resistivity |  m |
|
| IMPH | Medium induction phasor-processed resistivity | m |
|
| SFLU | Spherically focused resistivity | m |
|
| GHMT | Geologic high-sensitivity magnetic tool | ||
| MAGS | Magnetic susceptibility (limited range) | ppm | |
| RMGS | Low-resolution magnetic susceptibility (wider range) | ppm | |
| MAGC | Conductivity | ppm | |
| MAGB | Total magnetic field | nT | |
| DSI | Dipole shear sonic imager | ||
| DTCO | Compressional wave transit time | µs/ft | |
| DTSM | Shear wave transit time | µs/ft | |
| TAP | High-resolution temperature/acceleration/pressure tool | °C, m/s2, psi | |
| GPIT | General purpose inclinometer cartridge | ||
| Fx, Fy, Fz | Magnetic field (three orthogonal directions) | nT | |
| Ax, Ay, Az | Acceleration (three orthogonal directions) | m/s2 |