Process for producing mineral oil using surfactants based on a mixture of C32 guerbet-, C34 guerbet-, C36 guerbet-containing alkyl alkoxylates

US9701893B2 · 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
• Petra Neumann · Haßloch, DE
• Veronika Wloka · Mannheim, DE
• Martin Bock · Ludwigshafen, DE

Key dates

• Filing date: Aug 21, 2015
• Grant date: Jul 11, 2017
• Expiry date: Aug 21, 2035

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B43/16
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present 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 three ionic surfactants which are different with regard to the alkyl moiety (R1)(R2)—CH—CH2— and are of the general formula (R1)(R2)—CH—CH2—O-(D)n-(B)m-(A)l-XYa−a/bMb+ is injected through injection boreholes into a mineral oil deposit, and crude oil is withdrawn from the deposit through production boreholes.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 surfactant formulations of ionic surfactants of the general formula.