Process of fracturing subterranean formations

US11608468B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Faissal-Ali El-Toufaili · Ludwigshafen, DE
• Dennis Loesch · Altrip, DE
• Anna-Corina Schmidt · Trostberg, DE
• Tobias Joachim Zimmermann · Munich, DE
• Markus Ostermayr · Ludwigshafen am Rhein, DE
• Jack Tinsley · Mannheim, DE
• Brent Busby · Richmond, US

Key dates

• Filing date: Oct 17, 2019
• Grant date: Mar 21, 2023
• Expiry date: Oct 17, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/28
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Process of fracturing subterranean, oil-and/or gas-bearing formations by injecting an aqueous fracturing fluid into a wellbore at a rate and pressure sufficient to penetrate into the formation, and to initiate or extend fractures in the formation, wherein the aqueous fracturing fluid is obtained by mixing at least an aqueous base fluid and an aqueous polyacrylamide concentrate having a concentration of 3.1 to 14.9% by weight of polyacrylamides, relating to the total of all components of the aqueous polyacrylamide concentrate, and wherein at least a part of the aqueous fracturing fluid injected additionally comprises a proppant.