Method and apparatus for well logging using an accelerator neutron source
US5532482A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1995 |
| Grant date | Jul 2, 1996 |
| Priority date | — |
| Expiry date | Jun 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/107
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining a characteristic of an underground formation including the steps of irradiating the formation with high energy neutrons and detecting neutrons scattered by the formation having energies above epithermal to determine the nature of the formation matrix. Epithermal neutrons can also be detected to determine formation porosity. Apparatus includes a high energy neutron source, typically a D-T accelerator producing 14 MeV neutrons, and detectors such as .sup.4 He filled proportional counters for detecting neutrons having energies above epithermal and .sup.3 He filled proportional counters for detecting epithermal neutrons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.