|
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 |
|
|
DIT/DLL | Resistivity | 15 | 200/150/76, 61(dll) |
|
|
TAP | Temperature | 1 per s | NA |
|
|
|
Tool acceleration | 4 per s | NA |
|
|
|
Pressure | 1 per s | NA |
|
|
MGT† | Gamma ray | 15 | 15 |
| 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/SDT/LSS/BHC | Acoustic velocity | 15 | 107/120/61/61 |
| GHMT | NGT | Spectral gamma ray | 15 | 46 |
|
|
SUMS | Susceptibility | 5 and 15 | 35 |
|
|
NMRS | Total field | 5 and 15 | 45 |
| Borehole televiewer | BHTV | Sonic imaging | Variable | 1.5-8 |
| WST (stationary measurement) | WST | Sonic traveltime | Variable | NA |
Notes: All tool and tool string names (except the TAP and MGT tools) are trademarks of Schlumberger. For additional information about tool physics and use consult ODP Logging Services at www.ldeo.columbia.edu/BRG/ODP. * = see Table T4 for explanations of acronyms used to describe tool strings and tools. † = not included in each logging run. NA = not applicable.