China University of Petroleum

China University of Geosciences (beijing)

Cnpc Engineering Technology R&d Company Limited

Cnpc Chuanqing Drilling Engineering Company Limited

China Institute of Atomic Energy

Jianguo Zhang

Yu Zhang

Guancheng Jiang

Yinbo He

Lili Yang

Tengfei Dong

Bin Tan

Rongchao Cheng

Tie Geng

Jiansheng Luo

Xin Zhang

Kai Wang

Min Wang

Yong Wang

Yi Liu

Li Li Zhao

Jie Xu

Jinsheng Sun

Yan Chen

Xiaobo Liu

Lijun Zhang

Chunyao Peng

Xuwu Luo

Xing Liang

Kaixiao Cui

Jun Li

Xiaoxiao Ni

He Shi

Hui Du

Xiaohu Luo

Dong Liu

Ruizhi Li

Yuanfu Zhang

Fushan Wen

Wuquan Li

Nan Shi

Xiaoqing Li

Changlong Yin

Xiujie Yang

Xin Gong

Chunlin Xie

Bin Lou

Daqi Fu

Zhihao Li

Zhentao Zhang

Zhaojun Chen

Luning Chai

Zhichen Zhang

Enqiang Yu

Yu'e Fu

Huizhi Yuan

Zhiqing Ma

Chong Jiao

Yonggang Cao

Dongmin Jia

Xiaodong Yuan

Xiangxin Kong

Yancui Huo

Changwei Chen

Qifa Ran

Ren Ren

Xingwang Zhang

Weiting Zhang

Bokang Long

Wenping Qiu

Runjie Sun

Zhenyi Li

Yongzhi Luo

Haiyun Wang

Peng Nie

Lin Peng

The present invention relates to the field of petroleum industry phase oilfield chemistry, and specifically relates to a bionic and dual-phobic drilling fluid. The drilling fluid contains a bionic wall-fixing agent, a bionic lubricant, a super dual-phobic agent, a scrap-carrying agent and a bionic shale inhibitor. The present invention uses the theory of bionics and the theory of a downhole rock surface being double phobic as a basis. By means of using the bionic wall-fixing agent, the bionic lubricant, the super dual-phobic agent, the scrap-carrying agent and the bionic shale inhibitor, which have special properties of imitating animals and plants in nature, and using a series of bionic treatment agents, a set of bionic and dual-phobic drilling fluid systems, which corresponds to an unconventional, complex oil and gas well, is formed.

Bionic and dual-phobic high-performance water-based drilling fluid

A yield estimation device for a low-yield shale gas reservoir includes: a separation tank, a pulse gas detector, and a methane concentration detector; wherein a liquid inlet is provided at an upper portion of the separation tank; an exhaust pipe is provided on a top of the separation tank, and the pulse gas detector is installed at a middle section of the exhaust pipe; the methane concentration detector is installed at a tail end of the exhaust; a valve is installed in a liquid outlet; a float is arranged in the separation tank, which is connected to the valve through a telescopic float rod. A yield estimation method includes steps of: inputting flowback fluid into the separation tank through the liquid inlet; discharging the air in the separation tank; performing gas-liquid separation; detecting and displaying the shale gas in real time with the pulse gas detector.

Yield estimation device and method for low-yield shale gas reservoir

The invention relates to the technical field of oil and gas drilling, and discloses an amphiphilic block polymer ultralow-permeability agent and an intelligent temporary plugging type water-based drilling fluid. The ultralow-permeability agent contains a structural unit provided by styryl hydrophobic monomer, maleic anhydride and acrylamide; the drilling fluid contains two or more of water, sodium bentonite, Pac-Lv, the ultralow-permeability agent, calcium carbonate, one-way plugging agent, white asphalt and barite which are stored in a mixed manner or independently stored. When the amphiphilic block polymer provided by the invention is used as the ultralow-permeability agent of the intelligent temporary plugging type water-based drilling fluid, the self-adaptive characteristic is realized; according to the amphiphilic block polymer, temporary plugging layer gaps formed in pore and throats by plugging materials in drilling fluid can be fully filled under the condition that the sizes and the distribution of the pore and throats of reservoirs are not required to be clear, so that the permeability of temporary plugging layer is greatly reduced, ultralow-permeability is realized, and the amphiphilic block polymer is weak in tackifying effect, has gel-improving effect and can improve the rheological property of the drilling fluid.

Amphiphilic block polymer ultralow-permeability agent and intelligent temporary plugging type water-based drilling fluid

Preparation methods of a high modulus carbon fiber (HMCF) and a precursor (mesophase pitch (MP)) thereof are provided. The preparation method of MP includes: separating components with a molecular weight distribution (MWD) of 400 to 1,000 from a heavy oil raw material through size-exclusion chromatography (SEC); subjecting the components to ion-exchange chromatography (IEC) to obtain modified feedstock oil, where, the components are passed through macroporous cation-exchange and anion-exchange resins in sequence to remove acidic and alkaline components; and subjecting the modified feedstock oil to thermal polycondensation and carbonization to obtain high-quality MP with prominent spinnability. With high mesophase content, low softening point, low viscosity, and prominent meltability and spinnability, the obtained MP is a high-quality raw material for preparing HMCFs. The obtained MP can be subjected to melt spinning, pre-oxidation, carbonization, and graphitization to obtain an MP-based HMCF.

Preparation methods of high modulus carbon fiber (HMCF) and precursor (mesophase pitch (MP)) thereof

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Beijing, China

Jianguo Zhang