Micellar solution for recovering crude oil
AssigneeAngus Chemical Company
InventorsRobert B. Kayser, Robert F. Purcell
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Abstract
An improved process for recovering crude oil from a geological formation containing it using a micellar solution containing as a surfactant a salt of a petroleum sulfonic acid having an equivalent weight of from about 350-500 and as a co-surfactant 2-alkenyl-4,4-substituted oxazoline.
Claims7
In the process for recovering crude oil from a geological formation containing it using a micellar solution comprising a hydrocarbon, water, a petroleum sulfonate surfactant having an equivalent weight of about 350-500 and a co-surfactant, the improvement comprising using as the co-surfactant or portion thereof from 0.4 to 2.4% by weight of a substituted oxazoline represented by the formula ##STR2## where R is ethyl or hydroxymethyl, R.sup.1 is hydroxymethyl and the moiety R.sup.2 --C derives from oleic acid.
A micellar solution comprising a hydrocarbon water, a salt of a low-equivalent weight petroleum sulfonate surfactant having an equivalent weight of about 350-500, from 0.4 to 2.4% by weight of a substituted oxazoline, and saline water wherein the oxazoline is represented by the formula ##STR3## where R is ethyl or hydroxymethyl, R.sup.1 is hydroxymethyl and the moiety R.sup.2 --C derives from oleic acid.
Dependencies are inferred from the claim text.