Table T3. Measurements made by wireline tool strings.
| Tool string |
Tool | Measurement | Sampling interval (cm) |
Approximate vertical resolution (cm) |
|---|---|---|---|---|
| Triple combination | QSST | Inline check shot | TD – tool string length | |
| HNGS | Spectral gamma ray/Total gamma ray | 15 | 51 | |
| APS | Porosity | 5 and 15 | 43 | |
| HLDS/HLDT | Bulk density, photoelectric factor | 2.5 and 15 | 38/46 | |
| DIT | Resistivity, spontaneous potential | 15 | 61 | |
| TAP | Temperature, pressure | 1 per second | NA | |
| Formation MicroScanner(FMS)-sonic combination | DSI | Acoustic velocity | 15 | 107 |
| SGT | Total gamma ray | 15 | 46 | |
| GPIT | Tool orientation | 0.25 and 15 | NA | |
| FMS | Microresitivity imaging | 0.25 | 0.5 | |
| Well Seismic Tool (stationary) | WST | Sonic traveltime | Variable | NA |
Notes: All tool and tool string names presented in this table are trademarks of Schlumberger. For the complete list of acronyms used in the IODP and for additional information consult IODP Downhole Logging Tools at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html. See Table T4, for explanation of acronyms used to describe tool string and tools. NA = not applicable.
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