METHOD FOR EXTRACTING MINERAL OIL USING SURFACTANTS BASED ON BUTYLENE OXIDE-CONTAINING ALKYL ALKOXYLATES

摘要

The invention relates to a method for producing crude oil by means of Winsor type III microemulsion flooding, wherein an aqueous surfactant formulation which comprises at least one ionic surfactant of general formula R1-O-(D)n-(B)m-(A)I-XY- M+ is forced though injection wells into a mineral oil deposit and crude oil is removed from the deposit through production wells.