Micellar slug for oil recovery

Details Micellar slug for oil recovery Micellar slug for oil recovery

1983-03-31

1985-04-23

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, 252312, E21B 4322

Patent

active

045124043

ABSTRACT:
A micellar slug for use in the recovery of oil is described, the slug containing a hydrocarbon, an aqueous medium, a surfactant, and a cosurfactant. The surfactant contains, as an essential component, a divalent metal salt of an alpha-olefin sulfonic acid. This micellar slug has an excellent salinity tolerance and hard-water resistance. Furthermore, the micro-emulsion formed from the present micellar slug is maintained stable in a subterranean reservoir formed by alkaline earth metal carbonates and, therefore, the oil recovery efficiency can be improved.

REFERENCES:
patent: 3376336 (1968-04-01), Stein et al.
patent: 3506070 (1970-04-01), Jones
patent: 3508611 (1970-04-01), Davis et al.
patent: 3536136 (1970-10-01), Jones
patent: 3867317 (1975-02-01), Woo et al.
patent: 3954679 (1976-05-01), Wixon
patent: 3990515 (1976-11-01), Wilchester et al.

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