Scour-resistant interface enhancer used for well cementing of coalbed methane wells, preparation method, and application

US11820936B2 · kind B2 · utility

Assignees

• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN
• Guizhou Engineering Research Institute of Oil & Gas Exploration and Development · CN

Inventors

• Shenglai Guo · Qingdao, CN
• Yuhuan Bu · Qingdao, CN
• Chang Lu · Tainan, TW
• Lingyun Zhao · Qingdao, CN
• Yuanlong Wei · Qingdao, CN
• Qi Zhao · Chongqing, CN
• Huajie Liu · Qingdao, CN
• Qiang Wang · Beijing, CN
• Xinyang Guo · Qingdao, CN

Key dates

• Filing date: Jan 13, 2023
• Grant date: Nov 21, 2023
• Expiry date: Jan 13, 2043

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2103/0035
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A scour-resistant interface enhancer, a preparation method, and an application thereof are provided. The scour-resistant interface enhancer is a compound solution prepared by using a 0.1% surfactant CAEO-15 and a 0.3% silane coupling agent as solutes and using clear water and absolute ethanol as solvents, where the mass ratio of clear water to absolute ethanol is 9:1. The scour-resistant interface enhancer of the present invention used as pre-flush for well cementing of coalbed methane wells has good wettability modification effect, shows scour-resistant effect against cement slurry, exhibits good compatibility with cement slurry system, and can significantly improve the cementing strength and air tightness of two interfaces of coal bed and effectively enhance the cementing quality of coalbed methane wells.