Miscible flooding process
Patent
·
OSTI ID:7194483
A miscible flooding process is described for the recovery of oil from subterranean petroleum reservoirs containing excessive amounts of monovalent and polyvalent metal salts in which a specially formulated soluble oil is injected into the reservoir through one or more injection wells, and thereafter displaced through the reservoir towards one or more spaced production wells by the subsequent injection of an aqueous flooding medium. The soluble oil comprises an admixture of a liquid hydrocarbon, surface active alkyl aryl sulfonates, an organic stabilizing agent, and an alkali metal or ammonium salt of a sulfated alkyl primary alcohol ethoxylate having 12 to 16 carbon atoms in the alkyl group. The soluble oil can be substantially anhydrous, or it can contain water present in the form of a water-in-oil microemulsion. (auth)
- Assignee:
- Union Oil Co. of California
- Patent Number(s):
- US 3920073
- OSTI ID:
- 7194483
- Country of Publication:
- United States
- Language:
- English
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