Method of using urea as a sacrificial agent for surfactants in e

Details Method of using urea as a sacrificial agent for surfactants in e Method of using urea as a sacrificial agent for surfactants in e

1990-01-16

1991-01-08

Suchfield, George A.

Wells

Processes

Distinct, separate injection and producing wells

166274, 166275, 166303, 1663051, 252 8554, E21B 4322, E21B 4324

Patent

active

049827898

ABSTRACT:
The disclosed invention is a method of injecting a solution or emulsion containing about 0.05% to about 10% by weight of urea as a sacrificial agent for surfactants into an underground formation in enhanced oil recovery operations, said underground formation having a temperature greater than about 130.degree. F.

REFERENCES:
patent: 3414053 (1968-12-01), Treiber et al.
patent: 3777817 (1973-12-01), Feuerbacher et al.
patent: 4482015 (1984-11-01), Falk
patent: 4493370 (1985-01-01), Stapp et al.
patent: 4572296 (1986-02-01), Watkins
patent: 4732213 (1988-03-01), Bennett et al.

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