CO2 chemical reaction viscosity-increasing type polymer surfactant for gas channeling control during CO2 flooding in offshore heavy oil reservoirs, preparation method therefor and use thereof

US12410271B1 · kind B1 · utility

Assignees

• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN
• Qingdao University of Science and Technology · CN
• Sichuan University · CN

Inventors

• Guang Zhao · Qingdao, CN
• Jia-Hung Chen · Qingdao, CN
• Caili Dai · Qingdao, CN
• Haoran Cheng · Qingdao, CN
• Bin Yan · Beijing, CN
• Hao Ren · Qingdao, CN
• Yong Zheng · Cary, US
• Lianming Zhao · Qingdao, CN
• Qin Yang · Longbeilingcun, CN
• Wanlei Geng · Qingdao, CN
• Qingfeng Liu · 东风镇, CN

Key dates

• Filing date: Jan 21, 2025
• Grant date: Sep 9, 2025
• Expiry date: Jan 21, 2045

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2810/50
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present disclosure relates to the technical field of oilfield chemistry, and discloses a CO2 chemical reaction viscosity-increasing type polymer surfactant for gas channeling control during CO2 flooding in offshore heavy oil reservoirs, a preparation method therefor and use thereof, the CO2 reactive viscosity-increasing polymer surfactant includes structural units represented by formula (1), formula (2) and a formula (3) respectively; R1, R2, R3, R4 and R5 in formula (1) are respectively one or more of H, F, C1-C4 alkyl alcohol, and at least one group is F; R6, R7 and R8 in formula (2) are respectively one or more of H, C1-C4 alkyl; R in formula (3) is one or more of C10-C16 alkyl; the CO2 reactive viscosity-increasing polymer surfactant has a high CO2 gas channeling plugging strength, excellent chemical stability, and desirable heavy oil viscosity reduction performance;