Table T16. Measurements made by wireline tool strings.
| 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 and 15 | 46 | |
| DLL | Resistivity | 15 | 61 | |
| TAP | Temperature | 1 per s | NA | |
| Tool acceleration | 4 per s | NA | ||
| Pressure | 1 per s | NA | ||
| EMS | Temperature | 15 | NA | |
| Resistivity | ||||
| Formation MicroScanner (FMS)-sonic combination | FMS | Microresistivity | 0.25 | 0.5 |
| GPIT | Tool orientation | 0.25 and 15 | NA | |
| SGT | Total gamma ray | 15 | NA | |
| DSI | Acoustic velocity | 15 | 107 | |
| Ultrasonic Borehole Imager | UBI | Ultrasonic imaging | Variable | 0.5–2 |
| GPIT | Tool orientation | 0.25 and 15 | NA | |
| SGT | Total gamma ray | 15 | ||
| WST | WST | Acoustic arrival time | NA | NA |
| VSI | VSI | Acoustic arrival time | NA | NA |
Notes: All tool and tool string names (except the TAP) are trademarks of Schlumberger. For the complete list of acronyms used in the IODP and for additional information about tool physics and use consult IODP Logging Services at iodp.ldeo.columbia.edu/TOOLS_LABS/tools.html. See Table T17 for explanation of acronyms used to describe tool string and tools. NA = not applicable.
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