Apparatus and method for well logging utilizing associate particle imaging
US8338777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2010 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Oct 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for performing an operation in a borehole penetrating the earth includes a borehole tool and a neutron source within the borehole tool that emits neutron-alpha particles pairs as the result of a nuclear reaction. The apparatus also includes an alpha particle detector within the borehole tool arranged to detect when an alpha particle emitted by the neutron source strikes it and a gamma ray detector to detect gamma rays produced as a result of interactions between neutrons produced by the neutron source and at least one material in an area of interest outside of the borehole. The apparatus also includes a processing system that determines a characteristic of the area of interest based on a time difference between when the alpha particle strikes the alpha particle detector and a time when one or more gamma rays strikes the gamma ray detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.