	US 12,410,271 B1
	CO₂chemical reaction viscosity-increasing type polymer surfactant for gas channeling control during CO₂flooding in offshore heavy oil reservoirs, preparation method therefor and use thereof
Guang Zhao, Qingdao (CN); Jia Chen, Qingdao (CN); Caili Dai, Qingdao (CN); Haoran Cheng, Qingdao (CN); Bin Yan, Chengdu (CN); Hao Ren, Qingdao (CN); Yong Zheng, Qingdao (CN); Lianming Zhao, Qingdao (CN); Qin Yang, Chengdu (CN); Wanlei Geng, Qingdao (CN); and Qingfeng Liu, Qingdao (CN)
Assigned to China University of Petroleum (East China), Qingdao (CN); Qingdao University of Science and Technology, Qingdao (CN); and Sichuan University, Chengdu (CN)
Filed by China University of Petroleum (East China), Qingdao (CN); Qingdao University of Science and Technology, Qingdao (CN); and Sichuan University, Chengdu (CN)
Filed on Jan. 21, 2025, as Appl. No. 19/032,730.
Claims priority of application No. 202411794479.0 (CN), filed on Dec. 6, 2024.
Int. Cl. C09K 8/44 (2006.01); C08F 220/56 (2006.01); C09K 8/42 (2006.01); E21B 33/138 (2006.01); E21B 43/16 (2006.01)

CPC C08F 220/56 (2013.01) [C09K 8/426 (2013.01); C09K 8/44 (2013.01); E21B 33/138 (2013.01); E21B 43/164 (2013.01); C08F 2800/10 (2013.01); C08F 2810/50 (2013.01)]

19 Claims

1. A CO₂reactive viscosity-increasing polymer surfactant, wherein the CO₂reactive viscosity-increasing polymer surfactant comprises structural units provided by a Lewis acid monomer represented by formula (1), structural units provided by a Lewis base monomer represented by formula (2), structural units provided by a hydrophilic monomer, and structural units provided by an interfacially active monomer represented by formula (3);

wherein R₁, R₂, R₃, R₄and R₅in formula (1) are the same or different, each is one or more of H, F, C₁-C₄alkyl alcohol, and at least one group is F;

wherein R₆, R₇and R₈in formula (2) are the same or different, each is one or more of H, C₁-C₄alkyl;

wherein R in formula (3) is one or more of C₁₀-C₁₆alkyl.