Water-flooding method using an alcohol-surfactant mixture
Patent
·
OSTI ID:6585084
Oil recovered by a miscible-drive process is increased by incorporating in the solvent injected a minor proportion of a surface-active material. There is injected into the reservoir about 0.03 to 0.10 reservoir pore volume of a mixture consisting of a partly oxygenated hydrocarbon solvent (such as isopropyl alcohol, and similar) which is mutually soluble in oil and water, and about 0.01 to 2.0% by volume of a surfactant. The surfactant is chemically nonreactive with the solvent. The mixture is driven toward the producing well by the injection of floodwater. Experimental data show that 96.7% of the oil in place prior to solvent flooding was recovered using this secondary recovery method.
- Assignee:
- Union Oil Co California
- Patent Number(s):
- US 3236303
- OSTI ID:
- 6585084
- Country of Publication:
- United States
- Language:
- English
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