Determining residual oil saturation by injecting CO.sub.2 and ba

Details Determining residual oil saturation by injecting CO.sub.2 and ba Determining residual oil saturation by injecting CO.sub.2 and ba

1985-11-22

1986-10-21

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

73155, 166300, 436 27, E21B 4700

Patent

active

046179941

ABSTRACT:
Residual oil saturation is determined by injecting water containing dissolved CO.sub.2 and subsequently active base generating reactant into an oil and water containing reservoir and chromatographically analyzing the patterns of the concentrations of in situ reaction-depleted CO.sub.2 and reaction-increased bicarbonate salt in fluid produced from the reservoir.

REFERENCES:
patent: 3856468 (1974-12-01), Keller
patent: 3892275 (1975-07-01), Lybarger et al.
patent: 4178993 (1979-12-01), Richardson et al.
patent: 4330037 (1982-05-01), Richardson et al.
patent: 4406327 (1983-09-01), Fair et al.

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