Use of hydrophobically associated copolymer as an additive in specific oilfield applications

US9051503B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Roland Reichenbach-Klinke · Traunstein, DE
• Oscar Lafuente Cerda · Ebersberg, DE
• Andrea Assmann · Unterreit, DE
• Björn Langlotz · Trostberg, DE

Key dates

• Filing date: Nov 9, 2011
• Grant date: Jun 9, 2015
• Expiry date: May 17, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K8/92
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

What is proposed is the use of a water-soluble hydrophobically associating copolymer as an additive in the development, exploitation and completion of underground mineral oil and natural gas deposits and in deep drillings, wherein the copolymer comprises (a) at least one monoethylenically unsaturated monomer (a) selected fromH2C═C(R1)—R4—O—(—CH2—CH2—O—)k—(—CH2—CH(R3)—O—)l—R5  (I), and/orH2C═C(R1)—O—(—CH2—CH2—O—)k—R2  (II),and (b) at least one monoethylenically unsaturated, hydrophilic monomer (b) different from monomer (a),wherein the copolymer is obtainable through copolymerization of the monomers (a) and (b) in the presence of at least one surfactant (c).