Table T6. Measurements and specifications for wireline logging tools.
| Tool string* | Tool | Measurement | Sampling interval (cm) |
Approximate vertical resolution (cm) |
|---|---|---|---|---|
| Triple combination | HNGS | Spectral gamma ray | 15 | 51 |
| APS | Porosity | 5 and 15 | 43 | |
| HLDS | Bulk density | 2.5 | 38 | |
| EMS | Environmental (mud temperature and resistivity) | 15 | NA | |
| DIT-E | Resistivity | 15 | 200/150/76 | |
| TAP | Temperature | 1 per s | NA | |
| Tool acceleration | 4 per s | NA | ||
| Pressure | 1 per s | NA | ||
| Formation MicroScanner (FMS)-sonic combination | SGT | Total gamma ray | 15 | 46 |
| DSI | Acoustic velocity | 15 | 107 | |
| GPIT | Tool orientation | 0.25 and 15 | NA | |
| FMS | Microresistivity | 0.25 | 0.5 | |
| Well Seismic Tool (WST-3 components) stationary measurements | WST-3 | Sonic traveltime | Variable | NA |
Notes: * = all tool and tool string names (except the TAP tool) are trademarks of Schlumberger. For additional information about tool physics and use, consult IODP-USIO Science Services, LDEO, at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html. See Table T7 for explanations of acronyms used to describe tool strings and tools. NA = not applicable.
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