Wells – Processes – Distinct – separate injection and producing wells
Patent
1983-06-16
1985-03-12
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166303, E21B 4324
Patent
active
045039119
ABSTRACT:
A method for the recovery of oil from a subterranean, viscous oil-containing formation by injecting a predetermined amount of steam into the formation via a well completed in the middle portion of the oil-containing formation for a distance between 40 to 60 percent of the vertical thickness of the oil-containing formation, terminating injection of steam and producing fluids including oil through the same well used for the injection of steam. The steps of injecting steam and producing oil can be repeated for a plurality of cycles. Injecting steam through a selected completion interval in the middle of the formation induces maximum visbreaking of the viscous oil within the formation by controlling heat losses to the over and under strata.
REFERENCES:
patent: 3129757 (1964-04-01), Sharp
patent: 3330353 (1967-07-01), Flohr
patent: 3349849 (1967-10-01), Clossman
patent: 3439741 (1969-04-01), Parker
patent: 3460621 (1969-08-01), Gum et al.
patent: 3782470 (1974-01-01), West et al.
patent: 4262745 (1981-04-01), Stewart
Hartman Kathy J.
Shu Winston R.
Gilman Michael G.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Novosad Stephen J.
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