Title:
APPARATUS AND METHOD FOR WELL LOGGING UTILIZING ASSOCIATE PARTICLE IMAGING
Document Type and Number:
WIPO Patent Application WO/2011/031832
Kind Code:
A3
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.
Inventors:
NIKITIN ANTON (US)
VINOKUROV ALEXANDR (RU)
VINOKUROV ALEXANDR (RU)
Application Number:
PCT/US2010/048233
Publication Date:
July 21, 2011
Filing Date:
September 09, 2010
Export Citation:
Assignee:
BAKER HUGHES INC (US)
NIKITIN ANTON (US)
VINOKUROV ALEXANDR (RU)
NIKITIN ANTON (US)
VINOKUROV ALEXANDR (RU)
International Classes:
G01V5/14; G01V5/04
Foreign References:
| US5608215A | 1997-03-04 | |||
| US5416320A | 1995-05-16 | |||
| US20060227920A1 | 2006-10-12 |
Other References:
A. BEYERLE ET AL.: "Associated Particle Imaging", IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE, vol. 2, 2 November 1991 (1991-11-02) - 9 November 1991 (1991-11-09), pages 1298 - 1304
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