Process for removing oil from heterogeneous reservoirs
Patent
·
OSTI ID:6679495
A process is described for recovering oil from heterogeneous subterranean reservoirs having strata of widely varying permeabilities. A soluble oil miscible with the connate reservoir oil and with water is injected into the reservoir through an injection well. One or more aqueous solutions of reagents that react in the reservoir to form a plugging material are injected into the reservoir through the injection well prior to completing the injection of the soluble oil. An aqueous flooding medium is injected to drive the soluble oil toward a production well from which fluids are recovered. (9 claims)
- Assignee:
- Union Oil Co. of California
- Patent Number(s):
- US 3882938
- OSTI ID:
- 6679495
- Country of Publication:
- United States
- Language:
- English
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