Determining residual oil saturation using carbon 14 labeled carb

Details Determining residual oil saturation using carbon 14 labeled carb Determining residual oil saturation using carbon 14 labeled carb

1986-06-12

1988-11-08

Richman, Barry S.

Wells

Processes

With indicating, testing, measuring or locating

166300, 436 27, 436 29, E21B 4700, E21B 4900, G01N 3324

Patent

active

047828986

ABSTRACT:
Residual oil saturation is determined by injecting an aqueous solution containing a carbonate salt, an acid-generating material and a radioactive material which are each selectively water soluble, displacing the solution with an aqueous solution devoid of the reactants and tracer, and, after CO.sub.2 has formed within the reservoir, producing aqueous fluid from the reservoir and utilizing radioactive analysis to measure the chromatographic separation between the radioactive material and the CO.sub.2.

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patent: 4646832 (1987-03-01), Richardson

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