E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/33
E21B 43/20 (2006.01) C09K 8/594 (2006.01) E21B 43/16 (2006.01)
Patent
CA 1301636
ABSTRACT This invention relates to a gas flooding or miscible gas flooding operation under non-steamflood conditions. The sweep efficiency of the gas is improved by using a mixture of an alkylated diphenyl sulfonate and an alpha-olefin sulfonate as the surfactants in a mobility control fluid or diverter. The recovery method comprises injection sequentially or simultaneously through an injection well (1) a drive fluid of a gas or a gas/aqueous fluid to thin or solubilize and carry the hydrocarbons from the formation to a producing well and (2) a mobility control fluid of a surfactant/water mixture, wherein the surfactant component of the mobility control fluid is a mixture of one or more alkylated diphenyl sulfonates and one or more alpha- olefin sulfonates into the subterranean formation.
601370
Oswald Thomas
Robson Ian A.
Smart & Biggar
The Dow Chemical Company
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