Wells – Processes – Distinct – separate injection and producing wells
Patent
1985-05-14
1985-12-17
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166274, 166303, E21B 4324
Patent
active
045587400
ABSTRACT:
The present invention is directed to a method of oil recovery wherein a miscibility-generating fluid and a reservoir-heating medium are injected into an oil-bearing formation for which it was heretofore believed miscibility could not be generated. By injecting the heating medium, such as steam, with a miscibility-generating fluid, the minimum miscibility pressure of the fluid is lowered and miscibility is effected at a reservoir pressure below the fracture pressure of the formation.
REFERENCES:
patent: 3405761 (1968-10-01), Parker
patent: 3620304 (1971-11-01), Hearns et al.
patent: 3811501 (1974-05-01), Burnett et al.
patent: 3847224 (1974-11-01), Allen et al.
patent: 3954139 (1976-05-01), Allen
Hutchinson et al. "Phase Relations Of Miscible Displacement In Oil Recovery" A.I.C.H.E. Journal, Mar. 1961.
Yellig et al., "Determination and Prediction Of CO.sub.2 Minimum Miscibility Pressures" J.P.T. 1980.
Rushing et al., "High Pressure N.sub.2 Or Air Used For Miscible Displacement. . ." SPE Paper, 1977.
Yarborough et al., "Solvent and Driving Gas Compositions For Miscible Slug Displacement" SPE Journal, Sep. 1970.
Cochran Robert R.
Kisliuk Bruce M.
Novosad Stephen J.
Standard Oil Company
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