Wells – Processes – Distinct – separate injection and producing wells
Patent
1989-05-05
1990-05-08
Suchfield, George A.
Wells
Processes
Distinct, separate injection and producing wells
166288, 166294, 166303, 252 8554, B21B 4322, B21B 4324, B21B 33134
Patent
active
049230093
ABSTRACT:
A composition for use in enhanced oil recovery procedures comprises steam having a vapor phase and a liquid phase and a fluorocarbon surfactant partitioned between the liquid and vapor phases. The partitioning of the fluorocarbon surfactant between the two phases is accomplished by maintaining the composition's pH at less than about 11, and preferbly within the range of 7 to about 11. By varying the fluorocarbon surfactant concentration, the composition can be used as a surface tension depressant well stimulation additive and/or as a foam former for selectively blocking more permeable portions of a formation.
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Frieman Shlomo R.
Suchfield George A.
Union Oil Company of California
Wirzbicki Gregory F.
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