Wells – Processes – Distinct – separate injection and producing wells
Patent
1988-01-04
1989-01-03
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
166 50, 1663051, E21B 4322
Patent
active
047949872
ABSTRACT:
The invention is a method for recovering residual hydrocarbons from a reservoir which has been previously swept by gas. The invention steps comprise drilling and completing at least one horizontal injection well relatively near the top of the reservoir and relatively near a substantially vertically oriented boundary of the reservoir, drilling and completing at least one second injection well between the horizontal injection well and the vertical boundary of the reservoir, injecting a miscible solvent through the horizontal injection well to create a curtain of solvent falling through the previously gas swept reservoir, and injecting a drive fluid into the reservoir through the second injection well to drive the curtain of falling solvent horizontally through the reservoir. A production well is employed to produce hydrocarbons and other fluids that have been banked in front of the horizontally driven falling solvent curtain.
REFERENCES:
patent: 4086961 (1978-05-01), Braden, Jr. et al.
patent: 4249607 (1987-02-01), Allen
patent: 4501326 (1985-02-01), Edmunds
patent: 4510997 (1985-04-01), Fitch et al.
Kokolis George P.
McCoy Kevin P.
Delhommer Harold J.
Melius Terry Lee
Novosad Stephen J.
Park Jack H.
Priem Kenneth R.
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