Method for determining residual oil saturation

Details Method for determining residual oil saturation Method for determining residual oil saturation

E - Fixed Constructions

21

B

150/18

E21B 43/22 (2006.01) E21B 47/00 (2006.01) E21B 47/10 (2006.01) E21B 49/00 (2006.01) G01N 33/28 (2006.01)

Patent

CA 1290669

A B S T R A C T METHOD FOR DETERMINING RESIDUAL OIL SATURATION Residual oil saturation is determined by injecting water containing dissolved halocarboxylic acid salt and carbonate salt into an oil and water containing reservoir and chromatographically analyzing the patterns of the concentrations of in situ generated CO2 and water soluble acid salt in fluid produced from the reservoir.

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