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公开(公告)号：US20210396111A1
公开(公告)日：2021-12-23
申请号：US17352151
申请日：2021-06-18
申请人： Cenovus Energy Inc.
IPC分类号： E21B43/24 , E21B43/241
摘要： Disclosed are methods of producing hydrocarbons and recovering solvent from a subterranean reservoir that is penetrated by an injection well and a production well. The methods comprise orchestrating a production phase that involves injecting solvent (and optionally steam) to mobilize viscous hydrocarbons. The methods also comprise a solvent-recovery phase that involves non-condensable gas injection. The production phase and the solvent-recovery phase are each defined by an injection profile. The solvent-recovery-phase injection profile is selected: (i) based on the production-phase injection profile, and (ii) to ensure the pressure/temperature conditions in proximity to the production well favour gas-phase solvent recovery.
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