Method of recovering viscous oil from reservoirs with multiple h

Details Method of recovering viscous oil from reservoirs with multiple h Method of recovering viscous oil from reservoirs with multiple h

1987-01-12

1988-08-30

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166272, E21B 4324

Patent

active

047669586

ABSTRACT:
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.

REFERENCES:
patent: 2973039 (1961-02-01), Payne, Jr.
patent: 3692111 (1972-09-01), Breithaupt et al.
patent: 4387770 (1983-06-01), Hill
patent: 4392530 (1983-07-01), Odeh et al.
patent: 4519454 (1985-05-01), McMillen
patent: 4593759 (1986-06-01), Penick
patent: 4597443 (1986-07-01), Shu et al.
patent: 4669542 (1987-06-01), Venkatesan

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