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Simulation of methane adsorption in diverse organic pores in shale reservoirs with multi-period geological evolution

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International Journal of Coal Science & Technology 2021年第5期8卷 844-855页

作者： Shangbin Chen Chu zhang Xueyuan Li yingkun zhang Xiaoqi Wang Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education China University of Mining and TechnologyXuzhou 221116China School of Resources and Geoscience China University of Mining and TechnologyXuzhou 221116China

In shale reservoirs,the organic pores with various structures formed during the thermal evolution of organic matter are the main storage site for adsorbed ***,in the process of thermal evolution,the adsorption characteristics of methane in multi type and multi-scale organic matter pores have not been sufficiently *** this study,the molecular simulation method was used to study the adsorption characteristics of methane based on the geological conditions of Longmaxi Formation shale reservoir in Sichuan Basin,*** results show that the characteristics of pore structure will affect the methane adsorption *** adsorption capacity of slit-pores for methane is much higher than that of cylindrical *** groove space inside the pore will change the density distribution of methane molecules in the pore,greatly improve the adsorption capacity of the pore,and increase the pressure sensitivity of the adsorption *** the variation of methane adsorption characteristics of different shapes is not consistent with pore size,all pores have the strongest methane adsorption capacity when the pore size is about 2 *** addition,the changes of temperature and pressure during the thermal evolution are also important factors to control the methane adsorption *** pore adsorption capacity first increases and then decreases with the increase of pressure,and increases with the increase of *** the early stage of thermal evolution,pore adsorption capacity is strong and pressure sensitivity is weak;while in the late stage,it is on the contrary.

关键词： Adsorption mechanism Shale reservoir Diverse pores Multi-period geological evolution Thermal evolution

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Pore structure and heterogeneity of shale gas reservoirs and its effect on gas storage capacity in the Qiongzhusi Formation

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Geoscience Frontiers 2021年第6期12卷 192-208页

作者： Shangbin Chen Zhuo Gong Xueyuan Li Huijun Wang Yang Wang yingkun zhang Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education China University of Mining and TechnologyXuzhou 221116China School of Resources and Geoscience China University of Mining and TechnologyXuzhou 221116China

Fine characterization of pore systems and heterogeneity of shale reservoirs are significant contents of shale gas reservoir physical property research. The research on micro-control factors of low productivity in the Qiongzhusi Formation(Fm.) is still controversial. The lower Cambrian Qiongzhusi Fm. in the Qujing, Yunnan was taken as the object to investigate the influence of mineral compositions on the physical properties of the reservoir and the heterogeneity of shale, using the algorithm to improve the characterization ability of Atomic Force Microscopy(AFM). The results showed that:(1) The pores are mainly wedge-shaped pores and V-shaped pores. The pore diameter of the main pore segment ranges from 5 to 10 nm. Mesopores are mainly developed in the Qiongzhusi Fm. shale in Well QD1, with the average pore diameter of 6.08 nm.(2) Microscopic pore structure and shale surface properties show strong heterogeneity, which complicates the micro-migration of shale gas and increases the difficulty of identifying high-quality reservoirs.(3) The increase of clay mineral content intensifies the compaction and then destroys the pores. Conversely, brittle minerals can protect pores. The support and protection of brittle minerals to pores space depend on their content, mechanical properties and diagenesis.(4)Compression damage to pores, large microscopic roughness and surface fluctuations and strong pore structure heterogeneity are the reasons for the poor gas storage capacity of the Qiongzhusi Fm., which will lead to poor productivity in the Qiongzhusi Fm.

关键词： Shale gas Pore structure Heterogeneity AFM Qiongzhusi Formation

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Differences in shale gas accumulation process and its significance in exploration of Lower Silurian Longmaxi Formation in northeast Yunnan

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Frontiers of Earth Science 2021年第2期15卷 343-359页

作者： Shangbin CHEN Huijun WANG Yang WANG Tianguo JIANG yingkun zhang Zhuo GONG Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education China University of Mining and TechnologyXuzhou 221116China School of Resources and Geoscience China University of Mining and TechnologyXuzhou 221116China Yunnan Coalbed Methane Resources Exploration and Development Co. LtdKunming 650031China

The study and exploration practice of shale gas accumulation has focused on the static system comparison,key parameters analysis,reservoir characteristics,enrichment mode ***,the research on dynamic recovery from the original hydrocarbon generation of shale gas to the present gas reservoir is still *** burial history of shale gas reservoir can reflect the overall dynamic process of early formation and later transformation of shale gas *** controls the material basis of shale gas,the quality of reservoir physical properties,preservation conditions,gas content and formation energy,which is the core and foundation of shale gas accumulation process ***,based on the five typical wells data in the Northeast Yunnan,including geochronological data,measured Ro values,core description records,well temperature data,paleoenvironment,paleothermal,etc.,the burial history,thermal evolution history and hydrocarbon generation history of the Lower Silurian Longmaxi Formation were systematically restored via back stripping method and EASY%Ro *** results show that 1)the differences in the burial history of marine shale in Longmaxi Formation can be divided into syncline type and anticline type.2)The shale gas accumulation process can be divided into four stages,namely the sourcereservoir-cap sedimentation period,initial accumulation period,main accumulation period,and adjustment period.3)Based on the characteristics of burial history and preservation conditions,the areas with wide and gentle anticline,far away from the denudation area,and buried deeply with good fault sealing ability are priority structural locations for the shale gas exploration in northeast Yunnan.

关键词： shale gas accumulation process exploration significance Longmaxi Formation(Fm.) northeast Yunnan

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Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation

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Chinese Journal of Chemical Engineering 2024年第7期71卷 235-248页

作者： Pengfei Wu Zhaolong Liu Li Wu yingkun zhang Bing Wang zhanghao Cheng Wenquan Cui Xiangyang Lv Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China Hebei Pollution Control Technology Innovation Center of Steel and Coking Industry Department of Environmental and Chemical EngineeringHebei College of Industry and TechnologyShijiazhuang 050091China Hebei Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China Hebei Academy of Product Quality Supervision&Inspection Shijiazhuang 050227China

With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic *** this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial *** a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate *** results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated *** optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 *** influence of typical inorganic anions on degradation was also *** studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of *** results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical *** work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synerg

关键词： Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic Tetracycline degradation

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Flight path planning of agriculture UAV based on improved artificial potential field method

Flight path planning of agriculture UAV based on improved ar...

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第30届中国控制与决策会议

作者： zhang yingkun Institute of Applied Mathematics Hebei Academy of Sciences Hebei Authentication Technology Engineering Research Center

The flight path planning of agriculture UAV based on the traditional artificial potential field method is easy to fall into local minimum point in a complex environment with many obstacles. In order to describe the threat of obstacles, a threat model of obstacles is designed to endow the different threat level and threat coefficient of different types of *** the basis of the improved repulsive force function, the paper puts forward a new algorithm that a virtual target randomly generated within the scope of the local minimum point *** results of simulation experiments in MATLAB prove the validity of the improved algorithm.

关键词： Artificial potential field method Agriculture UAV Path planning Threats Local minimum point Virtual target point

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Volume Flow Rate Optimization of an Axial Fan by Artificial Neural Network and Genetic Algorithm

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Open Journal of Fluid Dynamics 2019年第3期9卷 207-223页

作者： yingkun zhang Yu Wang Jingyin Li School of Energy and Power Engineering Xi’an Jiaotong University Xi’an China

The present study is to improve the volume flow rate of an axial fan through optimizing the blade shape under the demand for a specified static pressure. Fourteen design variables were selected to control the blade camber lines and the stacking line and the values of these variables were determined by using the experimental design method of the Latin Hypercube Sampling (LHS) to generate forty designs. The optimization was carried out using the genetic algorithm (GA) coupled with the artificial neural network (ANN) to increase the volume flow rate of the axial fan under the constraint of a specific motor power and a required static pressure. Differences in the aerodynamic performance and the flow characteristics between the original model and the optimal model were analyzed in detail. The results showed that the volume flow rate of the optimal model increased by 33%. The chord length, the installation angle and the cascade turning angle changed considerably. The forward leaned blade was beneficial to improve the volume flow rate of the axial fan. The axial velocity distribution and the static pressure distribution on the blade surface were improved after optimization.

关键词： Axial Fan Volume Flow Rate Genetic Algorithm Artificial Neural Network

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Seroprevalence of neutralizing antibodies against adenovirus type 26 and 35 in healthy populations from Guangdong and Shandong provinces,China

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Virologica Sinica 2022年第5期37卷 716-723页

作者： Haisu Yi Qian Wang Jiankai Deng Hengchun Li yingkun zhang Zhilong Chen Tianxin Ji Wenming Liu Xuehua Zheng Qinghua Ma Xinxin Sun Yudi zhang Xuegao Yu Mengzhang He Ling Chen Ying Feng State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory HealthThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou510120China Department of Laboratory Medicine The First Affiliated HospitalSun Yat-sen UniversityGuangzhou510080China Center for Infection and Immunity Guangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou510530China Clinical Laboratory Pingyi Hospital of Chinese MedicineLinyi273399China Xiamen Institutes of Respiratory Health Xiamen361013China Department of Respiratory and Critical Care Medicine The Second Affiliated Hospital of Guangzhou Medical UniversityGuangzhou510260China University of Chinese Academy of Science Beijing100049China Guangzhou Laboratory&Bioland Laboratory Guangzhou510320China

Human adenoviruses type 26(HAdV26)and type 35(HAdV35)have increasingly become the choice of adenovirus vectors for vaccine ***,the population pre-existing immunity to these two adenoviruses in China,which may reduce vaccine efficacy,remains largely ***,we established micro-neutralizing(MN)assays to investigate the seroprevalence of neutralizing antibodies(nAbs)against HAdV26 and HAdV35 in the general population of Guangdong and Shandong provinces,China.A total of 1184 serum samples were collected,47.0%and 15.8%of which showed HAdV26 and HAdV35 nAb activity,***26-seropositive individuals tended to have more moderate nAbs titers(201-1000),while HAdV35-seropositive individuals appeared to have more low nAbs titers(72-200).The seropositive rates of HAdV26 and HAdV35 in individuals younger than 20 years old were very *** seropositive rates of HAdV26 increased with age before 70 years old and decreased thereafter,while HAdV35 seropositive rates did not show similar ***,the seropositive rates and nAb levels of both HAdV26 and HAdV35 were higher in Guangdong Province than in Shandong Province,but did not exert significant differences between males and *** seroprevalence between HAdV26 and HAdV35 showed little correlation,and no significant cross-neutralizing activity was *** results clarified the characteristics of the herd immunity against HAdV26 and HAdV35,and provided information for the rational development and application of HAdV26 and HAdV35 as vaccine vectors in China.

关键词： Human adenovirus type 26(HAdV 26) Human adenovirus type 35(HAdV 35) Neutralizing antibody(nAb) Seroprevalence Guangdong and shandong provinces

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“链接”--以设计与舞蹈之名

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南京艺术学院学报（美术与设计） 2021年第3期 185-190页

作者：张应鲲南京艺术学院工业设计学院江苏南京210013

本文选择奥斯卡·施莱默、鲁道夫·冯·拉班、安娜·特蕾莎·姬尔美可、威廉·弗赛斯四位“舞蹈”理论家作为特定研究案例,以他们的主要编舞理念与典型作品为切入点,试图以设计视角分析其各自舞蹈作品的空间建构模式与呈现效果,寻找其... 详细信息

本文选择奥斯卡·施莱默、鲁道夫·冯·拉班、安娜·特蕾莎·姬尔美可、威廉·弗赛斯四位“舞蹈”理论家作为特定研究案例,以他们的主要编舞理念与典型作品为切入点,试图以设计视角分析其各自舞蹈作品的空间建构模式与呈现效果,寻找其中与设计专业相同或相近的研究方法与表现形式,展开对“设计——舞蹈”链接点研究的探索。

关键词：奥斯卡·施莱默鲁道夫·冯·拉班安娜·特蕾莎·姬尔美可威廉·弗赛斯跨学科研究

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舞蹈即兴与空间建构——跨学科空间设计教学课题探索

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南京艺术学院学报（美术与设计） 2019年第3期 184-188页

作者：张应鲲南京艺术学院工业设计学院

本文对奥斯卡施莱默在包豪斯舞台工作坊的教学理论进行论述,研究其“人与空间关系”的相关理论,在此基础上以跨学科联合教学的方式,进行设计学科与舞蹈学科的联合教学实践:将舞蹈即兴作为研究对象,以设计视角探索肢体运动介入并作用于... 详细信息

本文对奥斯卡施莱默在包豪斯舞台工作坊的教学理论进行论述,研究其“人与空间关系”的相关理论,在此基础上以跨学科联合教学的方式,进行设计学科与舞蹈学科的联合教学实践:将舞蹈即兴作为研究对象,以设计视角探索肢体运动介入并作用于“限定性空间”的方式,从而激发对空间维度的想象力,寻找空间建构的多种方法。

关键词：跨学科教学舞蹈即兴可视化分析空间建构

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Aerodynamic Optimization of a Centrifugal Fan Using Response Surface Methodology

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Open Journal of Fluid Dynamics 2019年第1期9卷 92-105页

作者： Tao Liu yingkun zhang Kunhang Li Yu Wang Jingyin Li School of Energy and Power Engineering Xi’an Jiaotong University Xi’an China

In this paper, the optimization scheme of a centrifugal fan under the constraints of the total pressure difference, efficiency and shaft power was carried out. The blade inlet angle ?1A and the blade outlet angle ?2A of the centrifugal impeller were optimized using the Response Surface Methodology (RSM). Nine optimization cases were presented. The aerodynamic performance and the flow field of the optimized model were carefully compared with the original model. The results show that the total pressure difference and the total-pressure efficiency increase by 5.7% and 4.2% respectively after the optimization. Compared with the original fan, the flow field inside the impeller of the optimized fan has been improved. The flow separation existing around the blade suction surface outlet is suppressed significantly. For fields in the volute, the optimization scheme has reduced the local vortex intensity and weakened the vortex scale. The flow field stability around the volute tongue is also correspondingly improved.

关键词： Centrifugal Fan Optimization Response Surface Methodology

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