Southwest Petroleum University

Chengdu Leps Technology Co., Ltd

Qingsong Guo

Jianchun Guo

Shan Ren

Shaobin Zhang

Bin Liu

Su Diao

Qianli Lu

Mingyuan Zhou

Yang Lu

Jiapeng Zhang

Chi Chen

Cong Lu

Bo Gou

Gang Li

Tao Zhang

Kun Wang

Zhihong Zhao

Yuxuan Liu

Jichuan Ren

Hao Yang

Chaojun Tang

Hangyu Zhou

Yingxian Ma

Xin Lei

Hao Ou

Yangyi Xing

Hongmei Wang

Hengbo Zuo

Yongxin Zhu

Jiyu Wang

A suspended sand dragging fiber and a preparation method thereof, the method including: dispersing nanoparticles into a first solvent, adding a coating agent and a flexibilizer to the first solvent, and stirring and aging to obtain a surface treatment agent; adding a surfactant to a second solvent, adding alkyl polyether siloxane to the second solvent after the surfactant is dissolved in the second solvent, and stirring to obtain a finishing agent; transferring the surface treatment agent to a sizing trough of a sizing machine, sizing polyester fibers using the sizing machine, and drying and curing to obtain surface-modified fibers, and diluting the finishing agent to obtain a finishing agent solution, and treating the surface-modified fibers with the finishing agent solution to obtain the suspended sand dragging fiber.

Suspended sand dragging fibers and preparation methods thereof

The present disclosure provides a high-temperature-resistant deep penetration molecular membrane acid copolymer and a preparation method thereof. The copolymer is formed by polymerizing four raw monomers including 2-acrylamido-2-methylpropanesulphonic acid, vinyl phosphonic acid, alkyl dimethylallyl ammonium chloride, and perfluoropolyether acrylate. The method comprises: S1: mixing and stirring solvent oil, an emulsifier, the alkyl dimethyl allyl ammonium chloride, and the perfluoropolyether acrylate to be dispersed homogeneously to obtain an oil phase; S2: mixing and stirring the 2-acrylamido-2-methylpropanesulphonic acid, the vinyl phosphonic acid, a complexing agent, and distilled water, and adjusting pH to obtain an aqueous phase; S3: slowly dropwise adding the aqueous phase to the oil phase; and S4: introducing nitrogen into the water-in-oil emulsion to remove oxygen, then adding an initiator and carrying out a heating polymerization reaction to obtain copolymer emulsion (i.e., a molecular membrane agent). The copolymer emulsion is added to an acid solution to obtain molecular membrane acid.

High-temperature-resistant deep penetration molecular membrane acid copolymers and preparation methods thereof

A structural stabilizer for a fiber and proppant complex to enhance proppant migration and placement in a fractured well during propping and a preparation method thereof are provided. The structural stabilizer consists of: water, inorganic salt, kaolinite, nitrogen-doped modified graphene oxide, anionic surfactant, non-ionic alkyl polyglucoside, and polyacrylamide. The structural stabilizer improves bonding between a proppant and a fiber when slick water is used in stimulated reservoir volume (SRV) fracturing, prevents separation of the fiber and the proppant during migration, thereby reducing escape rate of the fiber from the fiber and proppant complex.

Structural stabilizer for fiber and conventional proppant complex in efficient proppant migration and placement technology of fractured well and preparation method

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Chengdu, China

Qingsong Guo