ENHANCED METHODS FOR RECOVERING VISCOUS HYDROCARBONS FROM A SUBTERRANEAN FORMATION AS A FOLLOW-UP TO THERMAL RECOVERY PROCESSES

摘要

Enhanced methods for recovering viscous hydrocarbons from a subterraneanformation asa follow-up to thermal recovery processes. The methods include injecting asolvent flood vaporstream into a first thermal chamber, which extends within the subterraneanformation, via asolvent flood injection well that extends within the first thermal chamber.The injecting includesinjecting to generate solvent flood-mobilized viscous hydrocarbons within thesubterraneanformation. The methods also include, at least partially concurrently with theinjecting, producingthe solvent flood-mobilized viscous hydrocarbons from a second thermalchamber, whichextends within the subterranean formation, via a solvent flood production wellthat extendswithin the second thermal chamber. The first thermal chamber was formed via afirst thermalrecovery process, and the second thermal chamber was formed via a secondthermal recoveryprocess, and the first thermal chamber and the second thermal chamber are influidcommunication with one another.