Table T3. LWD tool memory data acronyms, descriptions, and units. (See table notes.)
| Tool | Output | Description | Unit |
|---|---|---|---|
| adnVISION | Azimuthal Density Neutron tool | ||
| ROMT | Density (rotationally processed) | g/cm3 | |
| RHOB | Density (average bulk in situ formation density) | g/cm3 | |
| DRHO | Bulk density correction | g/cm3 | |
| TAB_DEN | Density time after bit | s | |
| NRHO | Bulk density, enhanced vertical resolution | g/cm3 | |
| DCAL | Differential caliper | inch | |
| TNPH | Thermal neutron porosity (ratio method) in selected lithology | pu | |
| TNPH_UNC | Hole size–corrected thermal neutron porosity | pu | |
| PEF | Photoelectric factor | b/e– | |
| TAB_NEU | Neutron time after bit | s | |
| IDDR | Image-derived density correction | g/cm3 | |
| IDPE | Image-derived photoelectric factor | b/e– | |
| IDRO | Image-derived density | ||
| geoVISION | geoVISION resistivity tool | ||
| GR | Gamma ray | gAPI | |
| RES_RING | Ring resistivity | Ωm | |
| RES_BIT | Bit resistivity | Ωm | |
| RES_BS | Shallow button resistivity | Ωm | |
| RES_BM | Medium button resistivity | Ωm | |
| RES_BD | Deep button resistivity | Ωm | |
| RES_BS_IMG | Shallow button resistivity image | Ωm | |
| RES_BM_IMG | Medium button resistivity image | Ωm | |
| RES_BD_IMG | Deep button resistivity image | Ωm | |
| TAB_RAB_BS | Shallow button resistivity time after bit | s | |
| TAB_RAB_BM | Medium button resistivity time after bit | s | |
| TAB_RAB_BD | Deep button resistivity time after bit | s | |
| ECAL_RAB | Electrical caliper computed from RAB resistivities | inch | |
| HAZI | Hole azimuth relative to true north | ° | |
| DEVI | Hole deviation from well survey | ° | |
| P1NO | Pad 1 azimuth in plane orthogonal to tool axis | ° | |
| TAB_RAB_RING | Ring resistivity time after bit | s | |
| sonicVISION | Sonic-while-drilling tool | ||
| SPWi | Receiver_i spectrum array | — | |
| Wfi | Filtered waveform_i, 0.5 ft averaged | ||
| WFiT | Filtered waveform_i, 2 inch averaged | ||
| DTTA | ΔT compressional from transmitter array | µs/ft | |
| DTRA | ΔT compressional from receiver array | µs/ft | |
| DTBC | ΔT compressional borehole compensated | µs/ft | |
| DTDF | ΔT compressional difference between DTRA and DTTA | µs/ft | |
| CHRA | Coherence at compressional peak; receiver array | — | |
| CHTA | Coherence at compressional peak; transmitter array | — | |
| TTRA | Transit time at compressional peak; receiver array | µs | |
| TTTA | Transit time at compressional peak; transmitter array | µs | |
| ITTI | Integrated transit time | ms | |
| DTCO | ΔT compressional | µs/ft | |
| seismicVISION | Seismic-while-drilling tool | ||
| SVWD_001_nascent_shot_s1.segy | Raw shots of surface hydrophone | ||
| SVWD_001_nascent_shot_h.segy | Raw shots of downhole hydrophone | ||
| SVWD_001_nascent_shot_x.segy | Raw shots of downhole geophone; x | ||
| SVWD_001_nascent_shot_y.segy | Raw shots of downhole geophone; y | ||
| SVWD_001_nascent_shot_z.segy | Raw shots of downhole geophone; z |
Notes: i = receiver number (1, 2, 3, or 4). RAB = resistivity-at-the-bit. DTRA =ΔT compressional from receiver array, DTTA =ΔT compressional from transmitter array.
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