Mixed well steam drive drainage process

Details Mixed well steam drive drainage process Mixed well steam drive drainage process

1994-04-28

1995-05-23

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166 50, 166245, 166303, E21B 4324

Patent

active

054172837

ABSTRACT:
A thermal oil recovery process is disclosed for use in an oil reservoir containing a plurality of laterally separated generally vertical wells that have been used for cyclic steam stimulation and that have left in the reservoir at least one of a heated depletion zone and a channel. The process includes the steps of: drilling a well having a horizontal section and an opening therein that is located laterally between at least two of the vertical wells and at a depth within the lower part of the reservoir; injecting a heated fluid through the two vertical wells to establish thermal communication with said horizontal well; and using steam drive and gravity drainage to recover oil from the reservoir through the horizontal well.

REFERENCES:
patent: 4344485 (1982-08-01), Bulter
patent: 4598770 (1986-07-01), Shu et al.
patent: 4682652 (1987-07-01), Huang et al.
patent: 5148869 (1992-09-01), Sanchez
patent: 5211230 (1993-05-01), Ostapovich et al.
patent: 5215146 (1993-06-01), Sanchez
patent: 5273111 (1993-12-01), Brannan et al.
patent: 5339897 (1994-08-01), Leaute

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