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

1983-01-17

1985-02-26

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166 50, 166271, E21B 4324

Patent

active

045013268

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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patent: 4344485 (1982-08-01), Butler

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