Southwest Petroleum University

Liangliang Xia

Xiao Guo

Ming Zhou

Linkai Li

Yinhua Gu

Mao Liao

Juncheng Bu

Hongjun Tu

Rongjun Yi

Peng'ao Peng

Yongqiang Shi

Jinfeng Zhang

Hongchang Han

The present invention disclosed a method for preparing a thickener for tight oil and gas reservoir, which relieves damages. The technical solution includes the following steps: putting a three-flask in ice; adding perfluoroalkyl alcohol, P-toluenesulfonyl chloride and pyridine; reacting for 3 h at 0-20&#xb0; C.; adding filter paper; ultrasonic dispersing for 1 h; removing the filter paper; washing the solution for 3-5 times by adding dilute hydrochloric acid to collect the intermediate product (I); adding 1,3-dihydroxy-propane-2-tert-butyl carbamate and the intermediate product (I) in another three-flask; adding potassium carbonate and N,N-dimethylformamide; reacting for 4 h at 40&#xb0; C. to collect the intermediate product (II); adding trifluoroacetic acid and methylene chloride into the intermediate product (II); reacting at 45&#xb0; C. for 2 h; extracting and vacuum drying; and adding 1,6-hexamethylene diisocyanate; reacting for 2 h to collect the final product (III).

Preparation method of supercritical carbon dioxide thickener for tight oil and gas reservoir

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Henan, China

Liangliang Xia