Steam enhanced oil recovery processes and compositions for...

Details Steam enhanced oil recovery processes and compositions for... Steam enhanced oil recovery processes and compositions for...

E - Fixed Constructions

21

B

31/8

E21B 43/22 (2006.01) C07C 19/08 (2006.01) C09K 8/592 (2006.01) C09K 8/94 (2006.01) C11D 1/83 (2006.01) E21B 43/24 (2006.01)

Patent

CA 2011951

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 preferably 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. A88156US.AP

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