Water injection profiling by nuclear logging

Details Water injection profiling by nuclear logging Water injection profiling by nuclear logging

1978-06-29

1980-02-19

Willis, Davis L.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250266, 250270, G01V 500

Patent

active

041896386

ABSTRACT:
Water injection profiling of a well by nuclear logging is disclosed. A dual detector sonde with a high energy neutron source is oriented and positioned above and below perforations in the casing of an injection well to monitor upward and downward flow, respectively, of injection water. The water is irradiated by the neutron source and resulting gamma ray production is sensed as the activated water flows by the spaced detectors. Count rate data is reduced and analyzed in terms of two energy windows to obtain linear flow velocities for water flow within and behind the casing. Volume flow rates are determined for upward and downward flow, and horizontal volume flow into the surrounding formations is calculated.

REFERENCES:
patent: Re27272 (1972-01-01), Young
patent: 2617941 (1952-11-01), Craggs
patent: 4032781 (1977-06-01), Arnold
patent: 4035640 (1977-07-01), Arnold et al.

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