method for producing mineral oil, mixture of surfactants, method for producing a mixture of surfactants, concentrate, and, use of a mixture of surfactants

摘要

the invention relates to a process for the production of mineral oil, in which an aqueous formulation of saline surfactant comprising a mixture of surfactants of at least one anionic surfactant of the general formula r1-o- (ch2c (ch3) ho) x- (ch2ch2o) y? so3m and at least one anionic surfactant of the general formula r2-o- (ch2ch2o) z? so3m and a base is injected through injection holes in a mineral oil deposit and the crude oil is removed from the deposit through production holes. the invention further relates to the mixture of surfactants, to a concentrate comprising the mixture of surfactants and to a manufacturing process, as well as to the use of the mixture of surfactants and to the concentrate in the production of mineral oil from underground deposits of mineral oil .