Surfactant flooding solutions with sulfonated creosote
AssigneeTexaco Inc.
InventorsAbraham Morduchowitz, Farrokh Yaghmaie
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Abstract
A surfactant flooding system for enhanced oil recovery is disclosed which comprises sulfonated creosote oil, as well as a surfactant and solubilizer. The use of sulfonated creosote oil substantially lowers the viscosity of the surfactant system as well as improving the oil recovery efficiency of the system.
Claims11
An aqueous surfactant solution for injection into an underground hydrocarbon formation to increase hydrocarbon recovery comprising water, about 0.5% to about 6.0% by weight of a petroleum sulfonate surfactant, about 0.4% to about 4.0% by weight of a solubilizer selected from alkoxylated compounds of the group consisting of alkylpolyalkoxy sulfates, alkylarylpolyalkoxy sulfates, alkylpolyalkoxy sulfonates alkylarylpolyalkoxy sulfonates and mixtures thereof and
- about 0.05% to about 3.0% by weight of a sulfonated creosote oil to decrease the viscosity of the aqueous surfactant solution,
- said total of surfactant, solubilizer and sulfonated creosote constituting about 1% to about 10% by weight of the total solution.
Dependencies are inferred from the claim text.