China University of Petroleum

China University of Geosciences (Beijing)

Oil and Gas Technology Research Institute, Petrochina Changqing Oilfield Company

Science and Technology Research Institute Ltd., Petro China

Lin Li

Caili Dai

Guang Zhao

Mingwei Zhao

Yining Wu

Qing You

Yongpeng Sun

Mingwei Gao

Yifei Liu

Xin Wang

He H Liu

Jiaming Li

Zhongzheng Xu

Sen Wang

Baoshan Guan

Ning Yang

Ping Yi

Dongfang Lyu

Teng Wang

Jiawei Liu

Hai'en Yang

Chenwei Zou

Zhenfeng Ma

Zhongxu Xie

The present discloses a mussel biomimetic heat-resistant and salt-tolerant thickener and a preparation method therefor, a gel fracturing fluid and a preparation method and use thereof.

Mussel biomimetic heat-resistant and salt-tolerant thickener, preparation method therefor, and gel fracturing fluid, preparation method and use thereof

The invention relates to the field of oilfield development engineering, and discloses a self-growing gel dispersion active fluidity control system and a fluid channeling control method for a low-permeability-tight reservoir. The system contains 100 parts by weight of a self-growing gel dispersion and 0.15-0.6 part by weight of a surfactant, the self-growing gel dispersion is prepared by shearing and grinding nano-reinforced chromium-aldehyde double-group cross-linked integral gel, and the preparation method of the nano-reinforced chromium-aldehyde double-group cross-linked integral gel comprises the following steps: adding a functional polymer, a phenolic resin cross-linking agent, are organic chromium cross-linking agent and a nano-reinforcer into water, mixing, and curing. The system can be simply and rapidly prepared, is easy for deep injection by adjusting the size of gel dispersion particles, is wide in action range, high in stability and long in effective period of action, can avoid reservoir pollution, and does not affect the liquid production capacity of the reservoir. The gel dispersion particles can achieve self-growth in the low-permeability-tight reservoir fractures, and the fracture fluid channeling control effect is enhanced.

Self-growing dispersed particle gel active mobility control system and fluid channeling control method for low-permeability-tight reservoir

The present disclosure discloses superhydrophobic nanoparticles and a preparation method therefor, and a superhydrophobic nanofluid.

Superhydrophobic nanoparticals and preparation method therefor, and superhydrophobic nanofluid

A mussel bionic gel composition includes: a mussel bionic copolymer and/or a mussel bionic compound, a cross-linking agent and water, wherein the mussel bionic copolymer includes a structural unit A from a vinyl monomer and a structural unit B from a vinyl-containing mussel bionic catechol group monomer; and the mussel bionic compound includes polyacrylamide and a mussel bionic catechol compound. The self-growth gel particle profile control and water plugging agent prepared from the composition is low in initial apparent viscosity, easy to inject and far in migration, has good shear repairing performance and is particularly applicable to a low-permeability fractured reservoir, thereby adjusting a micro-fracture network, improving a fracture channel and increasing waterflood efficiency and recovery efficiency.

Mussel bionic gel composition, self-repairing gel, profile control and water plugging agent, method for preparing self-repairing gel, and use

A CO-sensitive fracturing and displacement fluid contains a surfactant, an auxiliary agent, water, and CO, wherein COis liquid and/or supercritical CO. The CO-sensitive fracturing and displacement fluid provided by the invention does not flow back after completion of fracturing construction, and the gel breaking fluid displacement is carried out after soak for a period of time to improve the tight oil recovery ratio. The CO-sensitive fracturing and displacement fluid exerts the 'one-agent multi-purpose' function of sand carrying, COenergization and oil displacement, surfactant imbibition and oil discharge of a fracturing-displacement system in different development and production stages, and achieves the dual goals of expanding the utilization degree of tight oil and improving the displacement efficiency of the tight oil, which can effectively reduce costs and achieve the goal of unified, highly efficient and green development of oil and gas fields.

CO-sensitive fracturing and displacement fluid and method of making the same and method for fracturing and displacement of tight oil reservoir

The present invention relates to the field of profile control and flooding in oil fields, particularly to a colloidal nano-graphite-strengthened bulk gel system for dispersed particle gel, and composition thereof. The composition for bulk gel system, containing a polymeric matrix, a resin cross-linking agent, a coagulant, and colloidal nano-graphite, wherein, with respect to 100 parts by weight of the polymeric matrix, a content of the resin cross-linking agent is 30-150 parts by weight, a content of the coagulant is 5-100 parts by weight, and a content of the colloidal nano-graphite is 3-30 parts by weight; wherein, the polymeric matrix is partially hydrolyzed polyacrylamide with weight-average molecular weight within a range of 5,000,000-8,000,000 g/mol; the coagulant is one or more of chloride salt coagulant and alcohol amine coagulant. The specific components in the composition for dispersed particle gel in the present invention have excellent compatibility with each other, and can form a high-strength bulk gel system within 3-6h at 85-95&#xb0; C., and the obtained dispersed particle gel has relatively high temperature-resistance and salinity-resistance properties.

Colloidal nano-graphite-strengthened bulk gel system for dispersed particle gel and composition thereof

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Qingdao, China

Lin Li