Tertiary oil recovery

Details Tertiary oil recovery Tertiary oil recovery

1983-02-04

1985-03-05

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, E21B 4322

Patent

active

045025401

ABSTRACT:
An improved method for the recovery of tertiary oil from oil formations containing connate waters having a high brine concentration. A stable alcohol external microemulsion is formed from specific brine-soluble surfactants and alcohols for employment as a chemical slug. Such a microemulsion may be used to efficiently and effectively recover tertiary oil from formations in high brine concentrations. Specific examples of surfactants which may be employed to form the microemulsions of the present invention include amphoteric surfactants such as bis-2-hydroxyethylcocoamine propane sulfonate and bis-2-hydroxyethyloctadecyl amine propane sulfonate.

REFERENCES:
patent: 3373809 (1968-03-01), Cooke, Jr.
patent: 3536136 (1970-10-01), Jones
patent: 4125156 (1978-11-01), Glinsmann
patent: 4193452 (1980-03-01), Wilson et al.
patent: 4216097 (1980-08-01), Stournas
patent: 4404109 (1983-09-01), Tellier et al.

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