Oil recovery process using a tapered surfactant concentration sl

Details Oil recovery process using a tapered surfactant concentration sl Oil recovery process using a tapered surfactant concentration sl

1976-09-20

1978-07-11

Novosad, Stephen J.

Wells

Processes

Distinct, separate injection and producing wells

166274, E21B 4322

Patent

active

040995690

ABSTRACT:
A process for recovering oil from a subterranean reservoir in which a surfactant slug injected into the formation via an injection well is passed through the formation and oil is recovered via a production well penetrating the formation. In this process a tapered surfactant concentration slug is employed in which the surfactant concentraction is increased, either incrementally or gradually, during the slug injection time.

REFERENCES:
patent: 3369602 (1968-02-01), Fallgatter et al.
patent: 3371710 (1968-03-01), Harvey et al.
patent: 3670819 (1972-06-01), Dauben et al.
patent: 3768560 (1973-10-01), Hill et al.

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