Micellar slug for oil recovery

Details Micellar slug for oil recovery Micellar slug for oil recovery

1983-03-31

1985-12-03

Guynn, Herbert B.

Wells

Processes

Distinct, separate injection and producing wells

252 855D, E21B 4322

Patent

active

045561087

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 an essential component an internal olefin sulfonate having 10 to 26 carbon atoms and a disulfonate content of about 20% by weight or less. This micellar slug has an excellent capability for decreasing an interfacial tensions between oil and micro-emulsions and between water and micro-emulsions and an excellent salinity tolerance and hard-water resistance. Furthermore, the stable micro-emulsion from this micellar slug can be maintained during sweeping in subterranean reservoirs even when the salt concentration of the subterranean water is changed.

REFERENCES:
patent: 3376336 (1968-04-01), Stein et al.
patent: 3415753 (1968-12-01), Stein et al.
patent: 3506070 (1970-04-01), Jones
patent: 3508611 (1970-04-01), Davis et al.
patent: 3536136 (1970-10-01), Jones
patent: 3808156 (1974-04-01), Gorsich et al.
patent: 3867317 (1975-02-01), Woo et al.
patent: 3990515 (1976-11-01), Wilchester et al.
patent: 4064076 (1977-12-01), Klisch et al.

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