Table T4. Downhole measurements made by wireline tool strings, Expedition 340.
| Tool string | Tool | Measurement | Sampling interval (cm) |
Vertical resolution (cm) |
|---|---|---|---|---|
| Triple combo | EDTC | Total gamma ray | 5 and 15 | 30 |
| Triple combo + MSS | HNGS | Spectral gamma ray | 15 | 20–30 |
| HLDS | Bulk density | 2.5 and 15 | 38 | |
| HRLA | Resistivity | 15 | 30 | |
| MSS | Magnetic susceptibility | 2.54 | 40 | |
| FMS-sonic | EDTC | Total gamma ray | 5 and 15 | 30 |
| DSI | Acoustic velocity | 15 | 107 | |
| GPIT | Tool orientation and acceleration | 4 | 15 | |
| FMS | Microresistivity | 0.25 | 1 | |
| Versatile Seismic Imager | VSI | One-way acoustic traveltime | Stations at 10–25 m | NA |
| EDTC | Total gamma ray | 5 and 15 | 30 |
All tool and tool string names except the MSS are trademarks of Schlumberger. Sampling intervals are based on optimal logging speed. Acoustic imaging approximate vertical resolution is 500 kHz. NA = not applicable. For definitions of tool acronyms, see Table T5.
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