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公开(公告)号：US20220136376A1
公开(公告)日：2022-05-05
申请号：US17518947
申请日：2021-11-04
申请人： Cenovus Energy Inc.
发明人： Prince AZOM , Amos BEN-ZVI
摘要： Disclosed are methods for producing hydrocarbons from a subterranean reservoir. The methods comprise penetrating the subterranean reservoir with a plurality of well pairs that are laterally displaced across a well pad in an array. The methods further comprise operating the plurality of well pairs under a first set of conditions that induce a solvent-concentration gradient, a temperature gradient, or a combination thereof within the subterranean reservoir by: (i) injecting varying concentrations of steam, solvent, or combinations thereof across the array, and (ii) producing hydrocarbons from the reservoir via the plurality of well pairs. The methods further comprise operating the plurality of well pairs under a second set of conditions that delocalize the solvent-concentration gradient, the temperature gradient, or the combination thereof across the array to enhance hydrocarbon production.
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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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