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Novel plugging agent for oil-based drilling fluids to overcome the borehole instability problem in shale formations

IOP Conference Series: Materials Science and engineering 2019年第1期479卷

作者： L Li C Ma X G Xu S Li J Zhang Y Y Li Jiangxi Science & Technology Normal University Nanchang 330013 China CNPC Engineering Technology R&D Company Limited Beijing 102206 China

Based on borehole instability problems, a new kind of composite plugging agent for oil-based drilling fluids was developed, and the influence of plugging agent on shale stability was evaluated. The results indicated that the oil-based drilling fluids containing composite plugging agent could produce an ultra-thin, tight and relatively impenetrable mud cake, and consequently provided an excellent sealing effect. The core displacement experiment indicated that this plugging agent could reduce the shale permeability by a significant amount, and thus stop fluid invasion and improve wellbore stability. Using this plugging agent to seal the shale is a very powerful and economical approach to address borehole instability problem in troublesome shale formations. This plugging agent is suitable for the drilling of long sections of horizontal laterals. In the future, this plugging agent might hold great promise to resolve shale instability problem.

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Author Correction: Stabilization of layered lithium-rich manganese oxide for anion exchange membrane fuel cells and water electrolysers

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Nature Catalysis 2024年 604页

作者： Xuepeng Zhong Lijun Sui Menghao Yang Jiwei Ma Toshinari Koketsu Malte Klingenhof Peter Strasser Sören Selve Kyle G. reeves Chuangxin Ge Lin Zhuang Wang Hay Kan Maxim Avdeev Miao Shu Nicolas Alonso-Vante Jin-Ming Chen Shu-Chih Haw Chih-Wen Pao Yu-Chung Chang Yunhui Huang Zhiwei Hu Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai China Department of Chemistry Technical University Berlin Berlin Germany Battery Materials Development Section Business Creation Sector R&D Center Mitsui Mining and Smelting Company Limited Saitama Japan Center for Electron Microscopy (ZELMI) Technical University Berlin Berlin Germany Maison de la Simulation CEA CNRS Université Paris-Sud UVSQ Université Paris-Saclay Gif-sur-Yvette France The Institute for Advanced Studies Wuhan University Wuhan China Spallation Neutron Source Science Center Dongguan China Institute of High Energy Physics Chinese Academy of Sciences Beijing China Australian Nuclear Science and Technology Organisation Kirrawee DC New South Wales Australia School of Chemistry The University of Sydney Sydney Australia Institute of Advanced Science Facilities Shenzhen China IC2MP UMR-CNRS 7285 University of Poitiers Poitiers France National Synchrotron Radiation Research Center Hsinchu Taiwan State Key Laboratory of Material Processing and Die and Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan China Max Planck Institute for Chemical Physics of Solids Dresden Germany

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Investigation on Erosion resistance of downhole Throttle with Ultra-high Pressure

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IOP Conference Series: Earth and Environmental Science 2020年第1期453卷

作者： Huiyun Ma Yuan Jiang Qiang Yin Fangfang Zhang Shaowei Chen Yanxin Lv Guoping Lei Engineering Technology Research Institute PetroChina Southwest Oil & Gas Field Company Chengdu Sichuan 610017 China National Energy R&D Center of High Sulfur Gas Exploitation Chengdu Sichuan 610017 China CNPC Chuanqing Drilling Engineering Company Limited Guanghan Sichuan 618300 China School of Mechatronic Engineering Southwest Petroleum University Chengdu Sichuan 610500 China

The throttling nozzle, the core element of downhole throttling tool, is seriously eroded in the producing-sand gas well. In this paper, the fixed downhole throttle developed by Petro China Southwest Oil and Gasfield company is taken as the research object, and the flow state of gas and the movement of sand particles are expressed by rNG k – ε model and dPM model respectively. Through Fluent numerical simulation, the internal flow field distribution rule of throttle with diameter of 70mm is discussed, the most serious erosion area of throttle is obtained, and the influence of solid particle velocity, solid particle diameter and solid particle mass flow rate on the erosion of throttle are analyzed. It is meaningful to design and improve throttle according to working parameters of gas well. According to the simulation, it is believed that the fixed downhole throttle will contribute to a better understanding for erosion resistance of downhole throttle with ultra-high pressure.

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Optimum design of downhole chokes with high sulfur content and large pressure difference

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IOP Conference Series: Earth and Environmental Science 2020年第1期461卷

作者： Ma Huiyun Jiang Yuan Yin Qiang Zhang Fangfang Chen Shaowei Lv Yanxin Lei Guoping Engineering Technology Research Institute PetroChina Southwest Oil & Gas Field Company Chengdu Sichuan 610017 China National Energy R&D Center of High Sulfur Gas Exploitation Chengdu Sichuan 610017 China CNPC Chuanqing Drilling Engineering Company Limited Guanghan Sichuan 618300 China School of Mechatronic Engineering Southwest Petroleum University Chengdu Sichuan 610500 China

Natural gas resources are abundant in southwest China, but the exploitation environment with high pressure and sulfur always affects the working performance of downhole chokes, which in turn restricts the output of natural gas. In this paper, a high sulfur resistance fixed downhole choke is designed for high temperature (120°C), high production rate and high pressure difference (105MPa) sand-producing Wells. Through the nozzle discharge model to simulate the flow of the fluid through the nozzle, with Bono Maleev method to predict the hydrate formation conditions of downhole choke for the design of the structure. According to the failure forms of different parts, the materials were optimized, and the high sulfur resistant 3YC51 alloy, hard alloy and wear and corrosion resistant sulfur resistant rubber were selected through the test to improve the service life of the choke in the high sulfur high-pressure gas well and ensure the reliability of the tool. The results of numerical analysis on the tool holder and the pressure test of the Laboratory seal show that the choke designed has a good sealing and pressurization performance in the high temperature and high pressure difference environment of 120°C and 105MPa, and it can realize the function of lowering the pressure at the bottom of the well under this working condition, meeting the feasibility requirements. Through this design, the design and improvement of high sulfur gas well tool and new choke has guiding significance.

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Study on the multicomponent collaborative sealing mechanism of shale formations

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IOP Conference Series: Earth and Environmental Science 2019年第5期227卷

作者： Cha Ma Long Li Guojun Liu Zhiliang Zhao Jie Zhang Hongxuan Wu Jiangxi Science & Technology Normal University Nanchang 330013 China CNPC Engineering Technology R&D Company Limited Beijing 102206 China China National Oil and Gas Exploration and Development Company Ltd Beijing 100034 China CNPC Chuanqing Drilling Engineering Company Limited Chengdu 610051 China.

due to strong inhibitive ability, oil-based drilling fluid system was often the first choice of drilling fluids in the drilling operation of shale plays. However, borehole instability problems tend to occur most frequently in the drilling operation of horizontal well intervals. So the sealing mechanism of shale formation was of great importance to wellbore stability. Sealing effect of colloid particles, bridging and blocking effect of skeleton particles, plugging function of deformable particles and isolation effect of polymer were analysed, and multicomponent collaborative plugging mechanism was investigated. The results indicated that it could play an important role in plugging micropores and microfractures on shale surface to form a blocking layer with ultra-low permeability. This study can be helpful for the design of novel plugging agents for drilling fluids, and endow with economically and technically viable petroleum development and production.

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Effect of Hydrophilic Nano-SiO2 on CH4 Hydrate Formation: Insight from the Experimental Study

Effect of Hydrophilic Nano-SiO2 on CH4 Hydrate Formation: In...

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中国石油集团工程技术研究院有限公司首届青年论文报告会

作者： Wang ren Sun Huicui Wang Jianhua Zhang Jie Jiang Guosheng Ning Fulong CNPC Engineering Technology R & D Company limited National Engineering Laboratory for Oil&Gas Drilli China University of Geosciences National Engineering Laboratory for Oil&Gas Drilling Technology

Invasion of drilling fluid into natural gas hydrate deposits during drilling might damage the reservoir,induce hydrate dissociation and then cause wellbore instability and distortion of the data from well *** nanoparticles into drilling fluid is an effective method in reducing the invasion of drilling fluid and enhancing bore-hole ***,the addition of nanoparticles might also introduce hydrate formation risk in borehole because they can act as the "seeds" for hydrate *** paper presents an experimental study of the effect of hydrophilic silica nanoparticle on gas hydrate formation in a dynamic methane/liquid-water *** the experiment,the ul-trapure water with and without 1.0~6.0wt% concentrations of silica nanoparticles,grain sizes of 20nm and 50nm,were pressurized by methane gas under varied conditions of tem-perature and *** induction time,the gas consumption,and the average rate of gas consumption in the system were measured and compared to those in ultrapure *** results show that a concentration of 4.0wt% hydrophilic SiO2 particles with a grain size of 50 nm has a relatively strong inhibition effect on hydrate formation when the initial experimental condition is 5.0℃ and *** to ultrapure water,the hydrophilic nano-SiO2fluid increases the induction time for hydrate formation by 194% and decreases the amount and average rate of hydrate formation by 10% and 17%,*** inhibition effect may be attributed to the hydrophilicity,amount and ag-gregation of silica nanoparticle according to the results of water activity and zeta potential *** work also elucidates hydrophilic,instead of hydrophobic,nanoparticles can be added to the drilling fluid to maintain wellbore stability and to protect the hydrate reservoir from drilling mud damage,because they exhibit certain degree of hy-drate inhibition which can reduce the risk of hydrate reformation and aggregation during gas hydrate or

关键词： Hydrate drilling fluid Hydrophilic nano-SiO2,Concentration,Grain size,Hydrate formation,Inhibition mechanism

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Broadband Low-loss Fan-in/Fan-out devices for Multicore Fibers

Broadband Low-loss Fan-in/Fan-out Devices for Multicore Fibe...

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Asia Communications and Photonics Conference

作者： Yifan Kang Xiancong Guo Lin Gan Li Shen Chen Yang rui Zhang Lei Shen Weijun Tong Songnian Fu Ming Tang deming Liu Wuhan National Laboratory for Optoelectronics (WNLO) & Next Generation Internet Access National Engineering Lab (NGIA) School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan China State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC). R&D Center

We proposed and achieved broadband fused-taper type fan-in/fan-out devices for multicore fibers with -65 dB crosstalk at 1550 nm. The average insertion losses of Fi/Fo pair from O-band to L-band are all under 1.2 dB.

ISBN: (纸本)9781943580705

关键词： Fiber bundles Multicore fibers refractive index Single mode fibers Space division multiplexing Tapered fibers

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Effect of the combination of hydrophilic nano-SiO2 and gaffix VC-713 polymer on CH4 hydrate formation: Insight from the experimental study

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IOP Conference Series: Materials Science and engineering 2019年第1期634卷

作者： r Wang X G Xu X M Shi Y Y Li J Zhang Z Yang CNPC Engineering Technology R & D Company Limited Beijing 102206 China National Engineering Laboratory for Oil & Gas Drilling Technology Beijing 102206 China

In this paper, the effect of the combination of hydrophilic nano-SiO2 with a particle size of 80 nm and gaffix VC-713 polymer (VC-713) on their hydrate inhibition was investigated at 4.0°C and 6.0 MPa, and the underlying influence mechanism was analysed by a multiple scales of the meso-structural observation experiments. Experimental results indicated that the combination doesn't exhibit any synergistic inhibition effect on the formation of CH4 hydrate, but it weakens the hydrate inhibition abilities of both components. Moreover, with the increase of the VC-713 content to 0.75 wt% and 1.00 wt%, the inhibition of hydrophilic nano-SiO2 completely disappears.

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Synthesis and study of polystyrene/montmorillonite nanocomposite emulsion drilling fluid lubricant

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IOP Conference Series: Earth and Environmental Science 2019年第1期384卷

作者： Zhengrong Zhang Huiting Liu Yongjin Yu Yangchuan Ke Chengcheng Yu CNPC Engineering Technology R&D Company Limited Building 1 yard 5 huanghe street changping district Beijing China CNPC Nanochemistry Key Laboratory College of Science China University of Petroleum Beijing 102249 China

Conventional drilling fluid lubricants could effectively improve the lubricity of the system, but the temperature and salt resistance was poor. In this paper, a new type of emulsion drilling fluid lubricant was prepared by mixing a polystyrene/modified montmorillonite (MMT) nanocomposite emulsion with vegetable base oil. The nanocomposite emulsion was prepared by emulsion polymerization of organic MMT, modified with the tributyltetradecylphosphonium chloride and sodium lauryl sulfonate, and styrene. The work revealed effects of the amount of modified MMT and lubricant on the performance of the drilling fluid. It was shown that lubricants have less effect on the rheology and density changes of the drilling fluid. The lubricity, temperature resistance and salt resistance of the drilling fluid were enhanced, while the fluid loss was significantly reduced due to the addition of the lubricant. Our results provide the basic method needed to guide design of the lubricant.

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Vector mode inter-modal wavelength conversion in a dispersion tailored highly nonlinear few-mode fibre

Vector mode inter-modal wavelength conversion in a dispersio...

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45th European Conference on Optical Communication (ECOC 2019)

作者： Jitao Gao Elham Nazemosadat Jochen Schröder Chen Yang Songnian Fu Ming Tang deming Liu Weijun Tong Magnus Karlsson Peter A Andrekson National Engineering Laboratory for Next Generation Internet Access System School of Optics and Electronic Information Huazhong University of Science and Technology 430074 Wuhan China Photonics Laboratory Department of Microtechnology and Nanoscience Chalmers University of Technology SE-41296 Gothenburg Sweden R&D Center Yangtze Optical Fibre and Cable Joint Stock Limited Company (YOFC) 430073 Wuhan China

We present the design and fabrication of a dispersion tailored highly nonlinear few-mode fibre with an inter-modal nonlinear coefficient of 2.81 (W · km) −1 , the highest reported to date. Inter-modal wavelength ...

ISBN: (纸本)9781839531859

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