METHOD FOR PRODUCING MINERAL OIL USING SURFACTANTS BASED ON A MIXTURE OF C20 GUERBET C22 GUERBET C24 GUERBET CONTAINING HYDROCARBON ALKOXYLATES

摘要

The invention relates to a surfactant mixture containing in relation to the hydrocarbon part (R)(R) CH CH at least three different ionic surfactants of general formula (I) wherein R R A k X o Y a b M have the meaning indicated in the description and the claims. The invention further relates to the use and production thereof and to aqueous surfactant formulations containing the mixtures and to a method for producing mineral oil by means of Winsor type III micro emulsion flooding in which the aqueous surfactant formulation is forced through injection wells into a mineral oil deposit and the crude oil is removed from the deposit through production wells.