A method of treating a hydrocarbon containing formation is described. The
method may include providing a hydrocarbon recovery composition to the
hydrocarbon containing formation. Hydrocarbons in the hydrocarbon
containing formation may interact with the hydrocarbon recovery
composition. The hydrocarbon recovery composition may include an
aliphatic anionic surfactant and an aliphatic nonionic additive. In some
embodiments, an aliphatic anionic surfactant may be branched. In other
embodiments, an aliphatic nonionic additive may be branched.