Table T8. Wireline tool strings used and properties measured.
Tool
strings*
|
Typical
logging speed (m/hr) |
Individual
tools* |
Properties
measured |
Sample
interval (cm) |
Approximate
vertical resolution (cm) |
Approximate
depth of investigation (cm) |
---|---|---|---|---|---|---|
Triple combination (total length ~32 m) | 250-275 | HNGS | Natural gamma ray | 15 | 45 | Variable |
APS | Porosity | 5 and 15 | 30 | 15 | ||
HLDS | Bulk density, PEF | 15 | 38 | 15 | ||
DITE-SFL | Resistivity | 15 | 150/90/60 | 150/76/38 | ||
TAP | Temperature | 1/s | NA | NA | ||
Tool acceleration | 4/s | |||||
Pressure | 1/s | |||||
FMS-sonic (total length ~30 m) | 250-275 | NGT | Natural gamma ray | 15 | 45 | 45 |
GPIT | Tool orientation | 1 or 15 | ||||
DSI | Sonic velocity | 15 | 110 | 15-30 | ||
FMS | Resistivity image | 0.25 | 0.5 | 15 | ||
GHMT (total length ~9 m) | 300-400 | NGT | Natural gamma ray | 15 | 45 | 25 |
SUMS | Susceptibility | 5 and 15 | 35 | |||
NMRS | Total field | 5 and 15 | 45 | NA |
Notes: * = see Table T9 for explanations of acronyms used to describe tool strings and individual tool names. NA = not applicable.