Patent Number: 8,584,750

Title: Process for tertiary mineral oil production using surfactant mixtures

Abstract: A process for mineral oil production, especially Winsor type III microemulsion flooding, in which an aqueous surfactant formulation which comprises at least one nonionic surfactant having 8 to 30 ethoxy units, which has a polydispersity of from 1.01 to 1.12, and at least one further surfactant is forced through injection wells into a mineral oil deposit and crude oil is removed from the deposit through production wells.

Inventors: Bittner; Christian (Bensheim, DE), Gunter; Oetter (Frankenthal, DE), Tinsley; Jack (Mannheim, DE), Spindler; Christian (Ludwigshafen, DE), Alvarez Jurgenson; Gabriela (Mannheim, DE), Vogel; Sophie (Mannheim, DE)

Assignee: BASF SE

International Classification: E21B 43/22 (20060101); C09K 8/584 (20060101)

Expiration Date: 1/19/12018