A method is disclosed for increasing the recovery of oil in enhanced oil recovery operations employing anionic surfactant by blending a taurine with said anionic surfactant. The taurine may also increase the salt and divalent ion tolerance of the anionic surfactant.
The invention is a method of moving hydrocarbons through an underground formation for later recovery which comprises injecting an aqueous surfactant system having about 0.5% to about 10% of one or more surfactants and about 0.5% to about 10% of an alkoxylated dialkylate having the formula: wherein R.sub.1 and R.sub.2 are alkyl chains having about 3 to about 30 carbon atoms, R.sub.3 is C.sub.2 H.sub.4, C.sub.3 H.sub.6 or a mixture of C.sub.2 H.sub.4 and C.sub.3 H.sub.6, and n equals about 4 to about 300.
