Method of in-situ recovery of viscous oils or bitumen utilizing

Details Method of in-situ recovery of viscous oils or bitumen utilizing Method of in-situ recovery of viscous oils or bitumen utilizing

1978-09-14

1980-08-19

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166273, 166303, E21B 4324

Patent

active

042179564

ABSTRACT:
A method for the in-situ recovery of viscous oils or bitumen from subterranean oil-bearing formations by the injection of steam or a mixture of steam and an oxygen-containing gas under operating conditions that utilize pressurization and drawdown cycles wherein carbon dioxide is injected at the start of the pressurization cycle.

REFERENCES:
patent: 3358762 (1967-12-01), Closmann
patent: 3455392 (1969-07-01), Prats
patent: 3739852 (1973-06-01), Woods et al.
patent: 3782470 (1974-01-01), West et al.
patent: 3976137 (1976-08-01), Bousaid
patent: 4006778 (1977-02-01), Redford et al.
patent: 4026358 (1977-05-01), Allen
patent: 4099568 (1978-07-01), Allen
patent: 4121661 (1978-10-01), Redford
patent: 4127172 (1978-11-01), Redford et al.
patent: 4133382 (1979-01-01), Cram et al.

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