Southwest Petroleum University

Tianfu Yongxing Laboratory

Ying Xiong

Jinzhou Zhao

Wanfen Pu

Daijun Du

Rui Jiang

Jintao Li

Bo Zhou

Zezhou Fang

Chao Shen

Zijia Liao

Pengfei Chen

Tao Wu

Mingming Song

The present invention discloses a POSS-based hybrid supercritical COthickener and a preparation method thereof, and relates to the technical field of oil and gas field development. The preparation method of the thickener comprises the following steps: reacting tetramethyl tetravinylcyclotetrasiloxane, trimethylolpropane trimethacrylate, perfluoroacrylate and POSS containing one double bond in a molar ratio of 1-5:1-2:1-2:0.005-0.01 under the action of a catalyst to obtain the thickener. The preparation method of the POSS-based hybrid supercritical COthickener of the present invention is a bulk reaction, does not require the addition of a solvent, and does not pollute the human body and the environment in the production process. The POSS-based hybrid supercritical COthickener of the present invention has a high thickening efficiency on supercritical carbon dioxide and can better increase the viscosity of the supercritical carbon dioxide, so that the carrying and supporting effects of the supercritical carbon dioxide are improved.

POSS-based hybrid supercritical COthickener and preparation method thereof

The present invention discloses a supercritical CO2 thickener for shale gas reservoir based on hollow mesoporous silica nanoparticles and a preparation method thereof, and relates to the technical field of oil and gas field development. The preparation method of the thickener includes: reacting a monomer consisting of fluoroacrylate, styrene and vinyl acetate in a molar ratio of 3-5:1-2:1-2 with 2%-5% of a total weight of hollow mesoporous silica nanoparticles with carbon-carbon double bonds under the action of an initiator to obtain the thickener. The preparation method of the present invention does not involve the addition of organic solvents during the reaction process and thus does not cause harm to the human body. The thickener of the present invention has good CO2 viscosity-increasing effect and good sand carrying performance, and can effectively improve the fracturing effect.

Supercritical CO2 thickener for shale gas reservoir based on hollow mesoporous silica nanoparticles and preparation method thereof

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Chengdu, China

Ying Xiong