Recovery of hydrocarbons using artificial topseals

Details Recovery of hydrocarbons using artificial topseals Recovery of hydrocarbons using artificial topseals

E - Fixed Constructions

21

B

E21B 43/00 (2006.01) E21B 43/22 (2006.01) E21B 43/24 (2006.01)

Patent

CA 2729430

A method is described for recovering viscous oil such as bitumen from a subsurface formation. The method involves creating an artificial barrier in a subterranean zone above or proximate a top of the subsurface formation. The barrier is largely impermeable to fluid flow. The method also includes reducing the viscosity of the viscous oil and mobilizing hydrocarbons into a readily flowable heavy oil by addition of heat and/or solvent. Heating preferably uses a plurality of heat injection wells. The method further includes producing the heavy oil using a production method that preserves the integrity of the artificial barrier.

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