Process for tertiary mineral oil production using surfactant mixtures

US8584750B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

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

Key dates

• Filing date: Oct 13, 2010
• Grant date: Nov 19, 2013
• Expiry date: Dec 2, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/584
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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.