Use of unmodified kraft lignin, an amine and a water-soluble sul

Details Use of unmodified kraft lignin, an amine and a water-soluble sul Use of unmodified kraft lignin, an amine and a water-soluble sul

1997-05-27

1999-06-15

Suchfield, George

Wells

Processes

Distinct, separate injection and producing wells

166400, 166275, 507206, 507248, 507250, 507259, 507936, E21B 4322

Patent

active

059112760

ABSTRACT:
A method for the enhanced recovery of oil comprises injecting into an oil-containing formation an aqueous surfactant system having at least (1) a blend containing an unmodified Kraft lignin, an oil-soluble amine and a water-soluble sulfonate, and (2) water; driving the surfactant system through the formation and producing the oil mobilized by the surfactant system. A surfactant composition useful for enhanced oil recovery methods is also provided having at least an unmodified Kraft lignin, an oil-soluble amine and a water-soluble sulfonate.

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