System and method for matching lithology responses of downhole tools having different source energies
US9447680B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2010 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Jan 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/108
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems, methods, and devices for matching the lithology effect of a downhole tool having a lower-energy neutron source, such as AmBe, using a downhole tool having a higher-energy neutron source, such as an electronic neutron generator, are provided. One such downhole tool may include a neutron source, first and second neutron detectors, and data processing circuitry. The neutron source may emit neutrons into a subterranean formation, which may scatter off the formation. The first neutron detector may detect neutrons of a relatively lower spectrum of energies than the second neutron detector. From counts of these neutrons, the data processing circuitry may determine a property of the subterranean formation having a lithology effect that substantially matches another lithology effect associated with another downhole tool having a lower-energy neutron source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.