Oil recovery process using a polymer slug with tapered surfactant concentration
Patent
·
OSTI ID:5130928
A process is described for recovering oil from a subterranean reservoir in which a slug comprising an aqueous polymer solution containing a small amount of surfactant injected into the formation via an injection well is forced through the formation and oil is recovered via a production well penetrating the formation. In this process the concentration of the surfactant in the slug of the aqueous polymer solution is tapered by increasing the concentration of the surfactant either incrementally, gradually or by any other convenient method during the slug injection time.
- Assignee:
- Texaco Inc.
- Patent Number(s):
- US 4074759
- OSTI ID:
- 5130928
- Country of Publication:
- United States
- Language:
- English
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