Adding lignosulfonate to caustic floods to shift optimal salinit

Details Adding lignosulfonate to caustic floods to shift optimal salinit Adding lignosulfonate to caustic floods to shift optimal salinit

1988-01-04

1988-12-27

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166274, 166275, 252 8554, E21B 4322

Patent

active

047934190

ABSTRACT:
The invention is a method for recovering hydrocarbons from an underground hydrocarbon reservoir penetrated by at least one injection well and at least one production well, which comprises injecting into the reservoir through an injection well an aqueous caustic solution comprising greater than 0.1% and less than 1.0% lignosulfonate by weight to shift the optimal salinity for enhanced oil recovery of the caustic solution to a relatively higher salinity, and producing hydrocarbons and other fluids through a production well.

REFERENCES:
patent: 4006779 (1977-02-01), Kalfoglou
patent: 4110231 (1978-08-01), Swanson
patent: 4232738 (1980-11-01), Yen et al.
patent: 4466892 (1984-08-01), Chan et al.
patent: 4479542 (1984-10-01), Warchol et al.
patent: 4739041 (1988-04-01), Morrow et al.

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