Wells – Processes – Distinct – separate injection and producing wells
Patent
1994-07-01
1996-05-14
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166268, E21B 4322
Patent
active
055159192
ABSTRACT:
An enhanced oil recovery process comprises of the at least periodic introduction of (i) a non-condensible gas preferably selected from among carbon dioxide, nitrogen, methane or mixtures thereof, and (ii) an aqueous drive solution, preferably brine, into a reservoir formation. In this process, the half cycle of non-condensible gas injection, prior to aqueous drive fluid injection, measured in hydrocarbon pore volume is less than 0.25%. In this preferred embodiment, the non-condensible gas, e.g., carbon dioxide, and water, are simultaneously injected into the formation.
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Larson John R.
McPherson Steven D.
Robie Donnell R.
Stevens Chris E.
Wackowski Ronald K.
Chevron U.S.A Inc.
Suchfield George A.
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