China University of Petroleum

Weian Huang

Kaihe Lv

Guancheng Jiang

Jinsheng Sun

Jingping Liu

Xianbin Huang

Jintang Wang

Jiafeng Jin

Yingrui Bai

Jian Li

Rongchao Cheng

Shenglong Shi

Xiongjun Wu

Zhengsong Qiu

Jingwen Wang

Ming Lei

Jiaqi Zhang

Gongrang Li

An oil-soluble thermosensitive resin lost circulation material for protecting a reservoir includes the following raw materials in parts by weight: 40-60 parts of resin matrix, 15-40 parts of modified asphalt, 5-12 parts of viscosity modifier, 2-5 parts of cross-linking agent, 6-15 parts of softening point modifier, and 1-3 parts of dispersant; it further provides a method for preparing the resin lost circulation material; the resin lost circulation material can melt and adhere in different temperature ranges, rapid plugging is realized, and the plugging time is long; the oil-soluble thermosensitive resin lost circulation material can be dissolved by oil flow during oil well production, so that the reservoir permeability is recovered, so as to achieve the purpose of protecting the hydrocarbon reservoir.

Oil-soluble thermosensitive resin lost circulation material for protecting a reservoir as well as preparation method and application thereof

The present invention discloses temporary plugging agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof. The temporary plugging agent for drilling fluid is obtained by controlling gelatinized starch and a vinyl grafted monomer to have a polymerization reaction in an activator solution in the presence of a cross-linking agent and an initiator; the vinyl grafted monomer comprises acrylic acid, acrylamide, and 2-acrylamide-2-methyl propanesulfonic acid; the gelatinized starch is obtained by adding starch into deionized water to have a gelatinization reaction.

Temporary plugging agent for drilling fluid and preparation method thereof, and water-based drilling fluid and use thereof

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Qingdao, China

Weian Huang