Downhole neutron activation measurement
US8969793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2009 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Feb 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for measuring neutron-induced activation gamma-rays in a subterranean formation are provided. In one example, a downhole tool for measuring neutron-induced activation gamma-rays may include a neutron source and a gamma-ray detector. The neutron source may emit neutrons according to a pulsing scheme that includes a delay between two pulses. The delay may be sufficient to allow substantially all neutron capture events due to the emitted neutrons to cease. The gamma-ray detector may be configured to detect activation gamma-rays produced when elements activated by the emitted neutrons decay to a non-radioactive state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.