In-situ recovery of viscous hydrocarbonaceous crude oil

Details In-situ recovery of viscous hydrocarbonaceous crude oil In-situ recovery of viscous hydrocarbonaceous crude oil

E - Fixed Constructions

21

B

166/35

E21B 43/24 (2006.01)

Patent

CA 1209031

IN-SITU RECOVERY OF VISCOUS HYDROCARBONACEOUS CRUDE OIL ABSTRACT A process for recovering heavy hydrocarbonaceous oil in situ is disclosed. After a communication path is established between injection and production wells, a hot viscous fluid at least 20% of which is produced hydrocarbonaceous oil from the production well is circulated between the wells providing high sweep efficiency and good recovery of oil in place. In a preferred embodiment, the fluid comprises recirculated bitumen from the production well, steam, and small amounts of inert gas and emulsified water. The final stage is a recovery by conventional means.

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