Wells – Processes – Distinct – separate injection and producing wells
Patent
1993-03-01
1994-09-13
Novosad, Stephen J.
Wells
Processes
Distinct, separate injection and producing wells
1663051, 166309, E21B 4322, E21B 4332
Patent
active
053460081
ABSTRACT:
A process is provided for promoting oil production from a producing interval of a subterranean hydrocarbon-bearing formation by reducing undesirable gas production therefrom due to gas override or gas channeling in the upper portion of the interval. A polymer enhanced foam containing a polymer, an aqueous solvent, a surfactant, and a gas is placed in the upper portion of the producing interval, thereby substantially inhibiting or blocking the flow of gas therethrough to an oil production wellbore in fluid communication with the producing interval and enabling oil to more readily enter the wellbore for production to the surface.
REFERENCES:
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patent: 3379260 (1968-04-01), O'Brien
patent: 3393738 (1968-07-01), Bernard et al.
patent: 4676316 (1987-06-01), Mitchell
patent: 5129457 (1992-07-01), Sydansk
Hanssen, J. E., et al., "Foams for Effective Gas Blockage in the Presence of Crude Oil", SPE Paper, Apr. 22, 1990.
Krause, R. E., et al., "Foam Treatment of Producing Wells to Increase Oil Production at Prudhoe Bay", SPE Paper, Apr. 22, 1992.
Persoff, P., et al., "Aqueous Foams for Control of Gas Migration and Water Coning in Aquifer Gas Storage", Energy Sources, 1990.
Marathon Oil Company
Novosad Stephen J.
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