Method of recovering viscous oil from reservoirs with...

Details Method of recovering viscous oil from reservoirs with... Method of recovering viscous oil from reservoirs with...

E - Fixed Constructions

21

B

166/39

E21B 43/241 (2006.01) E21B 43/16 (2006.01) E21B 43/24 (2006.01) E21B 43/285 (2006.01)

Patent

CA 1285216

METHOD OF RECOVERING VISCOUS OIL FROM RESERVOIRS WITH MULTIPLE HORIZONTAL ZONES ABSTRACT OF THE DISCLOSURE There is disclosed a method of recovering viscous oil from a subterranean viscous oil-containing formation separated into at least one upper and at least one lower zone by a horizontal layer having lower vertical permeability than the rest of the reservoir. The method comprises injecting steam into the lower zone until steam breakthrough occurs at the production well; subsequently injecting steam into both the upper and the lower zones; and, continuing to inject steam into both zones and recovering fluids, including oil, from the production well.

555746

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