Lignin amine surfactant system followed by sequential polymer sl

Details Lignin amine surfactant system followed by sequential polymer sl Lignin amine surfactant system followed by sequential polymer sl

1987-04-06

1988-07-12

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

252 8554, E21B 4322

Patent

active

047563702

ABSTRACT:
The invention is a method of recovering hydrocarbons from an underground hydrocarbon formation penetrated by at least one injection well and at least one production well, which employs the steps of injecting a lignin amine surfactant slug, injecting an aqueous buffer slug of low salinity containing a polyacrylamide, injecting a high salinity aqueous drive fluid with polysaccharide, and recovering hydrocarbons and other fluids from the formation through a production well. The lignin amine surfactant slug is comprised of lignin, a primary amine having about 8 to about 18 carbon atoms and a sulfonate surfactant having an equivalent weight between about 200 and about 400 in the relative concentrations of about 1% to about 20% by weight of amine, about 10% to about 80% by weight of lignin, and about 10% to about 75% by weight of sulfonate surfactant.

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