Patent ID: 7789144
Filing Date: 2010-09-07
Classification: C09K

Abstract:
1. A method flooding an oil-bearing reservoir, comprising: a) introducing a flooding fluid into the reservoir, wherein the fluid has b) pushing oil through the reservoir to the vicinity of a wellbore at a location different than the point of introduction of the flooding fluid into the reservoir; and c) extracting the oil through the wellbore, wherein the one or more anionic surfactants is selected from the group consisting of formulas (I), (II), and (III): wherein R represents an alkyl, alkenyl, arylalkyl, or hydroxyalkyl group; wherein R has about 16 to about 24 carbon atoms; wherein R is saturated or unsaturated, branched or straight chained; and wherein branched alkyl groups have from 1 to about 6 carbon atoms.