Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement
US7129477B2 · kind B2 · utility
5Cited by
9References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2003 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Jan 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. An acoustic caliper is used for making standoff measurements of the NaI detectors. Measurements made by the detectors are partitioned into standoff bins. An adaptive spine and rib method uses the standoff measurements to obtain density estimates. The method of the invention may also be used with neutron porosity logging devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.