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/HLDT | Bulk density | 2.5 and 15 | 38/46 | |
| DLL | Resistivity | 15 | 61 | |
| TAP | Temperature | 1 per s | NA | |
| Tool acceleration | 4 per s | NA | ||
| Pressure | 1 per s | NA | ||
| Formation MicroScanner | NGT | Spectral gamma ray | 15 | 46 |
| (FMS)/sonic combination | GPIT | Tool orientation | 0.25 and 15 | NA |
| FMS | Microresistivity | 0.25 | 0.5 | |
| DSI | Acoustic velocity | 15 | 107 |
Notes: All tool and tool string names (except the TAP) are trademarks of Schlumberger. For additional information about tool physics and use consult ODP Logging Services at http://www.ldeo.columbia.edu/BRG/ODP. HNGS = hostile environment natural gamma ray sonde, APS = accelerator porosity sonde, HLDS = hostile environment lithodensity sonde, HLDR = hostile environment lithodensity logging tool, DLL = dual laterolog, TAP = temperature/acceleration/pressure tool, NGT = natural gamma ray spectrometry tool, GPIT = general purpose inclinometer tool, FMS = Formation MicroScanner, DSI = dipole sonic imager. NA = not applicable.