Radioactive well logging to determine vertical brine flow

Details Radioactive well logging to determine vertical brine flow Radioactive well logging to determine vertical brine flow

1990-06-11

1991-11-12

Fields, Carolyn E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250266, 2503562, G01V 512

Patent

active

050650165

ABSTRACT:
Brines in earth formations in the vicinity of a well borehole are bombarded with neutrons. The neutrons are slowed to thermal energy and captured by sodium atoms in the brine according to the nuclear reaction .sup.23 Na (n, .gamma.) .sup.24 Na. Spaced arrays of gamma ray detectors in a sonde in the borehole obtain gamma ray measurements following activation to obtain measurements of horizontal brine flow past the borehole. The detector arrays are vertically spaced from each other along the axis of the sonde. Changes in the count ratios of the detector arrays indicates a vertical flow of the brine.

REFERENCES:
patent: 3514598 (1970-05-01), Youmans
patent: 3603795 (1971-09-01), Allaud
patent: 4051368 (1977-09-01), Arnold et al.
patent: 4169979 (1979-10-01), Arnold et al.
patent: 4380701 (1983-04-01), Smith, Jr. et al.
patent: 4486658 (1984-12-01), Scott et al.

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