公开(公告)号：US20230391959A1

公开(公告)日：2023-12-07

申请号：US18025666

申请日：2022-07-28

Applicant: CHINA UNIVERSITY OF PETROLEUM, EAST CHINA

Inventor： Yanling WANG ,  Bin LIU ,  Baojiang SUN ,  Lei LIANG ,  Di LI

IPC: C08G77/50 ,  B01J23/42

CPC classification number: C08G77/50 ,  B01J23/42

Abstract: A preparation method for and an application of a modified siloxane-based supercritical carbon dioxide thickener are disclosed. The method includes the following steps: using 1,3-diallyl-1,3,5-triazine-2,4,6-trione as a polymerization monomer, and dropwise adding 1,3,5,7-tetramethylcyclotetrasiloxane for hydrosilylation in the presence of a catalyst to obtain a modified siloxane polymer. The obtained modified siloxane polymer is directly used as a supercritical carbon dioxide thickener without purification post-treatment; when in use, the modified siloxane polymer is prepared into a solution with a concentration of 1-2%, has an excellent thickening effect with no cosolvent required, and has high solubility in carbon dioxide and high temperature resistance.

公开(公告)号：US20240368459A1

公开(公告)日：2024-11-07

申请号：US18031360

申请日：2022-07-28

Applicant: CHINA UNIVERSITY OF PETROLEUM, EAST CHINA

Inventor： Yanling WANG ,  Chuanbao ZHANG ,  Lei LIANG ,  Bin LIU ,  Longhao TANG ,  Jincheng GONG ,  Ning XU

IPC: C09K8/68

Abstract: A guar gum fracturing fluid gel and a guar gum fracturing fluid system with reduced pH dependence, a preparation method and an application thereof are disclosed. The fracturing fluid gel includes 0.01-0.2% of nanomaterial, 0.1-0.5% of guar gum, 0.1-0.5% of organic boron-titanium crosslinker and a remaining amount of water. The fracturing fluid gel is more stable in network structure, tolerant of different temperatures and has good shear resistance. A preparation method and an application of the fracturing fluid gel are also provided. In the guar gum fracturing fluid system, the dependence on pH level is reduced, thereby alleviating the damage caused by a high pH value to a reservoir.