IMPROVED ENHANCED OIL RECOVERY SURFACTANT COMPOSITION AND METHOD OF MAKING THE SAME

摘要

The present invention is directed to an enhanced oil recovery composition comprising (a) a surfactant comprising an alkylated hydroxyaromatic sulfonate having formula (I), wherein R1 is an alkyl group containing from about 8 to 40 carbon atoms and having from about 20 % to about 50 % methyl branching, and M is a mono-valent cation; (b) a solvent; (c) a passivator; and (d) a polymer.