Oxygen activation downhole tool

Induced nuclear reactions: processes – systems – and elements – Nuclear transmutation – By neutron bombardment

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376166, G21G 106

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active

050948083

ABSTRACT:
The invention relates to an apparatus for detecting and measuring water production in oil and gas wells and in injection wells, involving a neutron source for activating oxygen atoms in any water produced or injected in the well, and a plurality of detectors, at least three (3) but preferably four (4), longitudinally spaced within the housing for detecting and counting gamma ray emissions resulting from the oxygen activation.

REFERENCES:
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"Use of Pulsed-Neutron Sources for Flow Measurements in Reactor Research" by Paul Kehler, American Nuclear Society Trans., pp. 141-142, 30 Nov. 1978.
"Advances in Nuclear Production Logging" by P. A. Wichmann et al., Trans., SPWLA (1967).
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"Examples of Detection of Water Flow by Oxygen Activation on Pulsed Neutron Logs" by W. H. M. DeRosset, in Paper CCC of SPWLA Twenty-Seventh Annular Logging Symposium, Jun. 9-13, 1986.
"Measuring Behind Casing Water Flow" by T. M. Williams, presented on May 5-7 at the International Symposium on Subsurface Injection of Oilfield Brines, in New Orleans.
"The Oxygen Activation Log, a Laboratory Evaluation" by H. J. Paap et al., Proceedings of the International Symposium on Class I & II Injection Well Technology, May 8-11, 1989, pp. 25-43.
"Practical Experience with Oxygen Activation Logging in South Mississippi" by J. B. Wienseneck, Id., pp. 7-24.
"The Aluminum Activation Log" by H. D. Scott and M. P. Smith, in the Log Analyst, Sep.-Oct. 1973, pp. 3-12.
"New Instrumentation and Interpretive Methods for Identifying Shielded Waterflow Using Pulsed Neutron Technology" by F. L. Hill III et al., Twelfth Formation Evaluation Symposium, Sep. 26-29, 1989, Calgary, Alberta, Canada Paper S.

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