METHOD FOR PRODUCING MINERAL OIL USING SURFACTANTS BASED ON A MIXTURE OF C32-GUERBET-, C34-GUERBET-, C36-GUERBET-CONTAINING ALKYL ALKOXYLATES.

摘要

The invention relates to a method for producing mineral oil by means of Winsor Type III microemulsion flooding, wherein an aqueous surfactant formulation which comprises, in relation to the alkyl part (R1)(R2)-CH-CH2-, at least three different ionic surfactants of general formula (R1)(R2)-CH-CH2-0-(D)n-(B)m-(A)I-XYa- a/b Mb+, is pressed though injection wells into a mineral oil deposit and crude oil is extracted from the deposit via production wells. The invention also relates to surfactants formulations of ionic surfactants according to the general formula.