METHOD OF IN-SITU RECOVERY OF VISCOUS OILS OR BITUMEN UTILIZING A THERMAL RECOVERY FLUID AND CARBON DIOXIDE

摘要

METHOD OF IN-SITU RECOVERY OF VISCOUS OILS OR BITUMENUTILIZING A THERMAL RECOVERY FLUID AND CARBON DIOXIDE(D#73,500-RCA-41-F)ABSTRACT OF THE DISCLOSUREA method for the in-situ recovery of viscous oilsor bitumen from subterranean oil-bearing formations by theinjection of steam or a mixture of steam and an oxygen-containing gas under operating conditions that utilizepressurization and drawdown cycles wherein carbon dioxide isinjected at the start of the pressurization cycle.-I-