Micellar slug for oil recovery

Details Micellar slug for oil recovery Micellar slug for oil recovery

1983-03-15

1985-08-13

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, 252312, E21B 4322

Patent

active

045344116

ABSTRACT:
A micellar slug for use in the recovery of oil, the slug containing a hydrocarbon, an aqueous medium, a surfactant, and a cosurfactant. The surfactant contains as essential components (a) at least one alpha-olefin sulfonate having 10 to 30 carbon atoms and (b) at least one ethoxylate selected from the group consisting of polyoxyethylene alkyl ethers and polyoxyethylene alkylphenyl ethers in a weight ratio of component (a) to component (b) of 8/2 to 3/7. The micro-emulsion can be formed from this micellar slug in a wide composition range. Furthermore, this micellar slug has an excellent salinity tolerance and hard-water resistance.

REFERENCES:
patent: 3506070 (1970-04-01), Jones
patent: 3508611 (1970-04-01), Davis et al.
patent: 3536136 (1970-10-01), Jones
patent: 3981361 (1976-09-01), Healy
patent: 3990515 (1976-11-01), Wilchester et al.

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