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Throttle characteristics of multi-stage circumfluence nozzle during the separate-layer injection of CO_(2)

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Petroleum 2018年第2期4卷 187-197页

作者： haizhu wang Gensheng Li Lichuan Zhao Youwen wang Yun Liu Qingling Liu Meng wang Fei Gao Meng Cai State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102200China Production Engineering&Research Institute of Daqing Oil Field Company Limited Daqing 163453China

Separate-layer injection of CO2 is an important method to improve oil and gas production and *** single-stage nozzle is usually blocked by impurities,and the ice-barrier phenomenon is very *** solve this problem,large-diameter multi-stage circumfluence nozzle was designed to release pressure stage by *** order to illuminate the throttle characteristics of the CO2 multi-stage circumfluence nozzles,numerical simulation was performed to test several nozzles with different diameters and stage ***,we tested the throttle characteristics through laboratory experiments and obtained the effects of several critical parameters such as nozzle diameter,number of stage and pressure drop on the throttle *** results show that the flow rate decreases as the nozzle stage increases on the condition of constant pressure and nozzle *** pressure difference increases as nozzle stage number increases under the constant flow *** throttle capability of multi-stage circumfluence nozzles was much better than the concentric ***-diameter multi-stage nozzle is recommended rather than small-diameter single-stage nozzle during the process of separate-layer injection,which can efficiently prevent impurities and ice *** results are expected to provide a theoretical support for the nozzle choice of separate-layer injection of CO2.

关键词： Supercritical CO2 Separate-layer gas injection Multi-stage circumfluence nozzle Throttle characteristics Pressure difference

Key problems and solutions in supercritical CO2 fracturing technology

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Frontiers in Energy 2019年第4期13卷 667-672页

作者： haizhu wang Gensheng LI Bin ZHU Kamy SEPEHRNOORI Lujie SHI Yong ZHENG Xiaomei SHI State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China China National Oil and Gas Exploration and Development Co. LtdBeijing 100034China Hildebrand Department of Petroleum and Geosystems Engineering University of TexasAustin TX 78712USA

Supercritical CO2 fracturing is considered to be a new method for efficient exploitation of unconventional reservoirs,such as shale gas,coal bed methane,and tight sand stone *** CO2 has many special properties including low viscosity,high diffusion coefficient,and lack of surface tension,which brings about great advantages for ***,these properties also cause several problems,such as difficulty in proppant transportation,high friction loss,and high pump *** this paper,the above problems were analyzed by combining field test with laboratory study and specific solutions to these problems are *** high frictionloss in the pipeline could be reduced by developing a new drag reducing agent and selecting large-size ***,for the problem of poor capacity in proppant carrying and sand plug,the methods of adding tackifier into supercritical CO2,increasing pump displacement and selecting ultralow density proppants are ***,for the problem of fast leak-off and high requirement for pump displacement,the displacement can be increased or the pad fluid can be injected into the *** solving the above three problems,the field test of supercritical CO2 fracturing can be *** research results can promote the industrialization process of supercritical CO2 fracturing.

关键词： supercritical CO2 fracturing friction loss proppant carrying flied test problem

Characteristics of proppant transport and placement within rough hydraulic fractures

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Petroleum Exploration and Development 2024年第2期51卷 453-463页

作者： HUANG Hai ZHENG Yong wang Yi wang haizhu NI Jun wang Bin YANG Bing ZHANG Wentong School of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065China Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery Xi’an 710075China Shaanxi Provincial Key Laboratory of Oil and Gas Well and Reservoir Seepage and Rock Mechanics Xi’an 710065China Oil&Gas Field Production Construction Division PetroChina Tarim Oilfield CompanyKorla 841000China National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China Shaanxi Yanchang Petroleum(Group)Co. Ltd.Xi’an 710075China

A three-dimensional reconstruction of rough fracture surfaces of hydraulically fractured rock outcrops is carried out by casting process,a large-scale experimental setup for visualizing rough fractures is built to perform proppant transport *** typical characteristics of proppant transport and placement in rough fractures and its intrinsic mechanisms are investigated,and the influences of fracture inclination,fracture width and fracturing fluid viscosity on proppant transport and placement in rough fractures are *** results show that the rough fractures cause variations in the shape of the flow channel and the fluid flow pattern,resulting in the bridging buildup during proppant transport to form unfilled zone,the emergence of multiple complex flow patterns such as channeling,reverse flow and bypassing of sand-carrying fluid,and the influence on the stability of the sand *** proppant has a higher placement rate in inclined rough fractures,with a maximum increase of 22.16 percentage points in the experiments compared to vertical fractures,but exhibits poor stability of the sand *** fracture width aggravates the bridging of proppant and induces higher pumping *** the viscosity of the fracturing fluid can weaken the proppant bridging phenomenon caused by the rough fractures.

关键词： reservoir fracturing rough fracture proppant transport and placement characteristics bridging buildup

Modeling of IEEE1588 on OPNET and Analysis of Asymmetric Synchronizing Error in Smart Substation

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Energy and Power Engineering 2013年第4期5卷 540-545页

作者： Jiongcong Chen haizhu wang Chunchao Hu Kai Ma Zexiang Cai Electric Power Research Institute Guangdong Power Grid Corporation Guangzhou China South China University of Technology Guangzhou China

The IEEE1588 network time synchronization, matched with smart substation information network transmission, is becoming the next generation advanced data synchronization of the smart substation. It is known that the inherent asymmetry error of the network synchronization approach in the smart substation is highlighted, which is concerned particularly. This paper models the synchronization process of the IEEE1588 based on the communication simulation software of OPNET Modeler. Firstly, it builds the models of master-slave clock, IEEE1588 protocol and network synchroniza- tion model, and analyzes the composition and influencing factors of the asymmetry error. Secondly, it quantitatively analyzes the influence of the synchronous asymmetric error of the IEEE1588 affected by the network status differences and the clock synchronization signal transmission path differences. Then its correction method is analyzed, in order to improve the IEEE1588 synchronization reliability and gives the solutions to its application in smart substation.

关键词： Smart Substation IEEE1588 Synchronization Asymmetric Error

Shale gas exploitation with supercritical CO_2 technology

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Engineering Sciences 2012年第4期10卷 12-15,42页

作者： wang haizhu Shen Zhonghou Li Gensheng Tian Shouceng Cheng Yuxiong State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China

This paper analyzes the physicochemical properties of supercritical C02, the characteristic of shale gas and shale gas reservoirs. The technologies of drilling, production, fracturing using the supercritical CO2 in shale gas explo- ration are proposed, to increase the penetration rate, decrease the damage to formation while fracturing, and enhance the recovery of shale gas. It is believed that the huge economic benefits of shale gas exploration with the supercritical CO2 fluid will be obtained, and it also can initiate a new technology field of CO2 in the petroleum engineering.

关键词： shale gas exploration supereritical CO2 drilling

高应变InGaAs/GaAs多量子阱中的局域态问题

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发光学报 2023年第4期44卷 627-633页

作者：王曲惠王海珠王骄马晓辉长春理工大学高功率半导体国家重点实验室吉林长春130022 长春理工大学重庆研究院重庆401135

针对高应变InGaAs/GaAs多量子阱中存在的局域态问题,利用金属有机化合物气相外延(MOCVD)技术,设计并生长了五周期的In_(0.3)Ga_(0.7)As/GaAs高应变多量子阱材料。通过原子力显微镜(Atomic force microscope,AFM)和变温光致发光(Photolum... 详细信息

针对高应变InGaAs/GaAs多量子阱中存在的局域态问题,利用金属有机化合物气相外延(MOCVD)技术,设计并生长了五周期的In_(0.3)Ga_(0.7)As/GaAs高应变多量子阱材料。通过原子力显微镜(Atomic force microscope,AFM)和变温光致发光(Photoluminescence,PL)测试,发现量子阱内部存在缺陷及组分波动的材料无序性表现,验证了多量子阱内部局域态的存在及起源。同时发现在不同测试位置,局域态在低温下对光谱的影响也不同,分别表现为双峰分布和峰位“S”型变化。这进一步说明材料内部无序化程度不同,导致局域态的深度也不同。依据温度-带隙关系的拟合,提出了包含局域态的多量子阱材料的电势分布,并揭示了局域态载流子和自由载流子的复合机制。并且借助变功率PL测试,研究了在不同激发功率密度下不同深度的局域态的发光特性。

关键词： InGaAs/GaAs多量子阱局域态高应变金属有机化合物气相外延(MOCVD)

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Research and applications of novel jet techniques in well drilling,completion and fracturing

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Science Foundation in China 2014年第2期22卷 68-80页

作者： LI GenSheng SHEN ZhongHou HUANG ZhongWei TIAN ShouCeng SHI HuaiZhong SONG XianZhi wang haizhu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum

Oil and gas have long been regarded as key elements for any industrialized ***'s economy and social security are largely dependent on oil and gas exploration and ***,a great deal of attention has been paid to various ways of efficiently developing oil and gas *** paper presents an overview of research and applications of novel jet techniques in well-drilling,well-completion and *** by the National Natural Science Foundation of China,through years of effort,significant achievements have been made in this *** only has the systematic theory of novel jetting been established,but also its application has been proved practical in petroleum *** paper focuses on the topics of the self-resonating cavitating jet,the abrasive water jet,and the supercritical CO_2 jet,in respect of theories,applications and prospects.

关键词： Cavitating jet Abrasive water jet Supercritical carbon dioxide Well-drilling Well-completion Fracturing Enhanced oil and gas recovery

Effect of annealing on the damage threshold and optical properties of HfO2/Ta2O5/SiO2 high-reflection film

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Chinese Optics Letters 2019年第11期17卷 85-90页

作者： Jianing Dong Jie Fan Sida Mao Yunping Lan Yonggang Zou haizhu wang Jiabin Zhang Xiaohui Ma State Key Laboratory of High-Power Semiconductor Laser Changchun University of Science and TechnologyChangchun 130022China

The effect of thermal annealing on the optical properties, microstructure, and laser-induced damage threshold(LIDT) of HfO2/Ta2O5/SiO2 HR films has been investigated. The transmission spectra shift to a short wavelength and the X-ray diffraction peaks of monoclinic structure HfO2 are enhanced after thermal annealing. The calculated results of the m(-111) diffraction peak show that the HfO2 grain size is increased, which is conducive to increasing the thermal conductivity. Thermal annealing also reduces the laser absorption of high-reflection films. The improvement of thermal conductivity and the decrease of laser absorption both contribute to the improvement of LIDT. The experimental results show that the highest LIDT of 22.4 J/cm2 is obtained at300°C annealing temperature. With the further increase of annealing temperature, the damage changes from thermal stress damage to thermal explosion damage, resulting in the decrease of LIDT.

关键词： optical annealing damage

中国古代文论话语的深度翻译与学术传播——宇文所安英译《文赋》的个案考察

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浙江大学学报（人文社会科学版） 2024年第7期54卷 85-92页

作者：张威王海珠北京外国语大学英语学院北京100089

加强中国古代文论话语的国际传播是当前加强中国话语国际传播的一项重要内容。加强中国古代文论话语的国际传播,需在确认中国古代文论异质性的基础上推动其与西方文论的平等对话。“深度翻译”是一种尊重源语文本异质性、肯定人类文化... 详细信息

加强中国古代文论话语的国际传播是当前加强中国话语国际传播的一项重要内容。加强中国古代文论话语的国际传播,需在确认中国古代文论异质性的基础上推动其与西方文论的平等对话。“深度翻译”是一种尊重源语文本异质性、肯定人类文化多样性的学术翻译策略,其语文学基础和共在性逻辑要求译者充分解读源语文本并真正尊重他者文化,能够为中西文论的平等对话开辟一条有效的学术路径。宇文所安对《文赋》的深度翻译借助“翻译加解说”的体例和“直译加注释”的方法,还原了中国文论话语的本来面目,推动了中西文论话语的双向阐发和互动会通,为中国古代文论的国际传播与接受提供了有益借鉴。

关键词：中国古代文论深度翻译学术传播宇文所安《文赋》