Patent ID: 8759261
Filing Date: 2014-06-24
Classification: C09K

Abstract:
1. A method of treating a hydrocarbon containing formation, comprising: (a) providing a hydrocarbon recovery composition to at least a portion of the hydrocarbon containing formation, wherein the composition comprises one or more internal olefin sulfonates having 17 or more carbon atoms, (b) adding water and/or brine from the hydrocarbon formation to the composition, (c) adding a solubilizer which comprises an ethoxylated alcohol wherein the alcohol before ethoxylation had an average molecular weight of at least about 220 and the ethoxylated alcohol has 20 or more carbon atoms, wherein the ethoxylated alcohol comprises from 5 to 9 moles of ethylene oxide per mole of alcohol and (d) allowing the composition to interact with hydrocarbons in the hydrocarbon containing formation.