Process for extracting mineral oil using surfactants based on butylene oxide-containing alkyl alkoxylates

US8607865B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christian Bittner · Bensheim, DE
• Günter Oetter · Bischofswerda, DE
• Jack Tinsley · Mannheim, DE
• Christian Spindler · Günzburg, DE
• Gabriela Alvarez-Juergenson · Mannheim, DE
• Sophie Vogel · Mannheim, DE

Key dates

• Filing date: Mar 9, 2011
• Grant date: Dec 17, 2013
• Expiry date: Jan 26, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K23/42
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for mineral oil extraction by means of Winsor Type III microemulsion flooding, in which an aqueous surfactant formulation comprising at least one ionic surfactant of the general formula R1—O-(D)n-(B)m-(A)l-XY−M+ is injected through injection boreholes into a mineral oil deposit, and crude oil is withdrawn from the deposit through production boreholes. The invention further relates to ionic surfactants of the general formula.