Injection of steam and solvent for improved oil recovery

Details Injection of steam and solvent for improved oil recovery Injection of steam and solvent for improved oil recovery

E - Fixed Constructions

21

B

166/33

E21B 43/20 (2006.01)

Patent

CA 1214387

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.

450146

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