Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-79-87
A. A. Mirzayanov, V.A. Nitsenko, L.Z. Kazina, Y. Pityuk, A.Yu. Lomukhin
To select and justify effective compositions for limiting water inflow into gas wells, an understanding of the behavior of the multiphase system on the scale of individual pores is necessary. In turn, capillary forces depend on the interfacial tension and wettability of the pore surface. As part of this work, computational microfluidics methods were used using the OpenFOAM platform to analyze the effect of rock wettability on the features of two-phase filtration of water and gas in a T-shaped micromodel of a porous medium, which is a crack connected to an element of a porous matrix. A mathematical model was chosen that allows you to describe the movement of fluid in a fracture by the Navier-Stokes equation, and in elements of a porous matrix by the Darcy equation. A grid of a T-shaped micromodel of a porous medium was generated using a GMSH grid generator. The displacement of water by gas from the fracture and porous matrix was simulated. Multivariable analysis of water displacement by gas for hydrophobic and hydrophilic surface was carried out by varying wetting angles. The dependencies of the residual water of the micromodel on the contact angle and flow modes were conducted. It has been found that at low filtration rates, water enters the fracture from the porous medium, which blocks the direct flow of gas through the fracture. In the case of a hydrophilic surface, the water inflow from the porous matrix is greater than in the case of a hydrophobic surface, since blocking the fracture results in gas filtration through the porous medium and displacement of water therefrom. The proposed approach can be used to rank effective bottomhole treatment agents and select optimal filtration modes to limit water inflow into gas wells.
{"title":"NUMERICAL SIMULATION OF GAS AND WATER FILTRATION IN POROUS MEDIUM MICROMODELS","authors":"A. A. Mirzayanov, V.A. Nitsenko, L.Z. Kazina, Y. Pityuk, A.Yu. Lomukhin","doi":"10.17122/ngdelo-2023-3-79-87","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-79-87","url":null,"abstract":"To select and justify effective compositions for limiting water inflow into gas wells, an understanding of the behavior of the multiphase system on the scale of individual pores is necessary. In turn, capillary forces depend on the interfacial tension and wettability of the pore surface. As part of this work, computational microfluidics methods were used using the OpenFOAM platform to analyze the effect of rock wettability on the features of two-phase filtration of water and gas in a T-shaped micromodel of a porous medium, which is a crack connected to an element of a porous matrix. \u0000A mathematical model was chosen that allows you to describe the movement of fluid in a fracture by the Navier-Stokes equation, and in elements of a porous matrix by the Darcy equation. A grid of a T-shaped micromodel of a porous medium was generated using a GMSH grid generator. The displacement of water by gas from the fracture and porous matrix was simulated. Multivariable analysis of water displacement by gas for hydrophobic and hydrophilic surface was carried out by varying wetting angles. The dependencies of the residual water of the micromodel on the contact angle and flow modes were conducted. It has been found that at low filtration rates, water enters the fracture from the porous medium, which blocks the direct flow of gas through the fracture. In the case of a hydrophilic surface, the water inflow from the porous matrix is greater than in the case of a hydrophobic surface, since blocking the fracture results in gas filtration through the porous medium and displacement of water therefrom. The proposed approach can be used to rank effective bottomhole treatment agents and select optimal filtration modes to limit water inflow into gas wells.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"3 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75342658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-6-16
V. A. Parfiryev, V.Р. Ovchinnikov, I. V. Druzhinina, N. Zakirov, P. Ovchinnikov, O.V. Rozhkova
Most of the explored and estimated oil reserves of the East Siberian oil and gas province are located in the Republic of Sakha (Yakutia), and in particular, the field is located on the territory of the Lensky district, the development object of which is the formation of the Hamakinsky horizon. The reservoir is characterized by high reservoir properties, oil-saturated thickness, medium permeability, abnormally low pressures, low temperature, the presence of carbonate, terrigenous, chemogenic and karst rocks in the geological section, tectonic deformations, reservoir intrusions and salt-saturated interlayers. These factors create problems in the process of its initial opening, and during further operation cause the deterioration of its filtration and capacitance properties compared to those stated in the design documentation. The use of highly mineralized or anhydrous drilling fluids recommended for drilling wells in the considered oil and gas zone does not allow to overcome the instability of rheological properties, an increase in the values of the filtration index, deep clogging of the reservoir, the accumulation of fluid density and the risk of high repression on the reservoir. The article theoretically substantiates the expediency of using invertemulsion solutions (IES) for the initial opening, the effectiveness of which, compared with aqueous solutions, is expressed in the exclusion of the formation of sludge crusts, stable formation oil-water emulsions and swelling of anhydrite, and the reduction of clogging effect in the near-wellbore part collector. Nevertheless, in order to justify the introduction of one or another composition (type) of IES at the stage of theoretical research, various compositions based on mineral oil, diesel fuel, oil obtained in the course of earlier laboratory tests were considered for comparison with water-based solutions, taking into account required density and clogging action of the flushing fluid, physical and chemical inertness of the dispersed phase of the solution, low formation temperature. The substantiation of the most effective type of fluid was carried out using a methodology based on the method of analysis of hierarchies, the optimality criterion in which is the largest weighted average value of the superiority (priority) of one of the drilling fluid options over others simultaneously in all parameters, taking into account the degree of importance of the latter. Based on estimates of normalized and ideal priorities, it has been established that its highest value, both in the case of a distributed synthesis method and in the ideal one, belongs to oilbased IES.
{"title":"SUBSTANTIATION OF SELECTION OF DRILLING MUD TYPE FOR INITIAL OPENING OF KHAMAKINSKY HORIZON TERRIGENOUS RESERVOIR","authors":"V. A. Parfiryev, V.Р. Ovchinnikov, I. V. Druzhinina, N. Zakirov, P. Ovchinnikov, O.V. Rozhkova","doi":"10.17122/ngdelo-2023-3-6-16","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-6-16","url":null,"abstract":"Most of the explored and estimated oil reserves of the East Siberian oil and gas province are located in the Republic of Sakha (Yakutia), and in particular, the field is located on the territory of the Lensky district, the development object of which is the formation of the Hamakinsky horizon. The reservoir is characterized by high reservoir properties, oil-saturated thickness, medium permeability, abnormally low pressures, low temperature, the presence of carbonate, terrigenous, chemogenic and karst rocks in the geological section, tectonic deformations, reservoir intrusions and salt-saturated interlayers. These factors create problems in the process of its initial opening, and during further operation cause the deterioration of its filtration and capacitance properties compared to those stated in the design documentation. The use of highly mineralized or anhydrous drilling fluids recommended for drilling wells in the considered oil and gas zone does not allow to overcome the instability of rheological properties, an increase in the values of the filtration index, deep clogging of the reservoir, the accumulation of fluid density and the risk of high repression on the reservoir. \u0000The article theoretically substantiates the expediency of using invertemulsion solutions (IES) for the initial opening, the effectiveness of which, compared with aqueous solutions, is expressed in the exclusion of the formation of sludge crusts, stable formation oil-water emulsions and swelling of anhydrite, and the reduction of clogging effect in the near-wellbore part collector. \u0000Nevertheless, in order to justify the introduction of one or another composition (type) of IES at the stage of theoretical research, various compositions based on mineral oil, diesel fuel, oil obtained in the course of earlier laboratory tests were considered for comparison with water-based solutions, taking into account required density and clogging action of the flushing fluid, physical and chemical inertness of the dispersed phase of the solution, low formation temperature. \u0000The substantiation of the most effective type of fluid was carried out using a methodology based on the method of analysis of hierarchies, the optimality criterion in which is the largest weighted average value of the superiority (priority) of one of the drilling fluid options over others simultaneously in all parameters, taking into account the degree of importance of the latter. Based on estimates of normalized and ideal priorities, it has been established that its highest value, both in the case of a distributed synthesis method and in the ideal one, belongs to oilbased IES.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"108 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75647515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-123-132
S. N. Martynenko, V.V. Zakharov
More and more often in various industries, polymer materials are replacing metal structures. The gas industry is no exception, one of the areas of development of which was the introduction of polyethylene pipes to replace traditional steel pipes. This process began more than half a century ago, and according to data at the beginning of 2023, polyethylene pipes account for about 49.5 % of the length of all underground gas pipelines of gas distribution networks. The main obvious advantage of polyethylene pipes over steel pipes is corrosion resistance, which allows them to be operated without the use of protective anticorrosive coatings and electrochemical protection means. The strength properties of polyethylene pipes allow their operation at gas pressure up to 1.2 MPa, which makes it possible to almost fully meet the needs of the gas distribution sphere. The welding technologies of polyethylene pipes are well developed, standardized and automated. An important problem for long-term operating polyethylene gas pipelines is the assessment of their technical condition and determination of the residual life. Despite the existing need for work of this kind (for example, in 2022 only in the territory of the Saratov region it was required to carry out technical diagnostics of 8 gas pipelines with a total length of 39.86 km), expert organizations do not have the necessary tool for implementing this task today. Although the mechanism of aging of polyethylene is well known, there are no generally accepted standards for assessing the performance of polyethylene gas pipelines based on a comprehensive accounting of the influence of aging factors that determine their technical condition. The purpose of this article is to highlight the experience of Giproniigaz JSC in technical diagnostics of polyethylene gas pipelines, as well as to draw the attention of specialists from both the gas industry and academic science to the problem of developing a methodology for technical diagnostics of polyethylene gas pipelines.
{"title":"POLYETHYLENE GAS PIPELINES: PROBLEMS AND EXPERIENCE OF TECHNICAL DIAGNOSTICS","authors":"S. N. Martynenko, V.V. Zakharov","doi":"10.17122/ngdelo-2023-3-123-132","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-123-132","url":null,"abstract":"More and more often in various industries, polymer materials are replacing metal structures. The gas industry is no exception, one of the areas of development of which was the introduction of polyethylene pipes to replace traditional steel pipes. This process began more than half a century ago, and according to data at the beginning of 2023, polyethylene pipes account for about 49.5 % of the length of all underground gas pipelines of gas distribution networks. \u0000The main obvious advantage of polyethylene pipes over steel pipes is corrosion resistance, which allows them to be operated without the use of protective anticorrosive coatings and electrochemical protection means. The strength properties of polyethylene pipes allow their operation at gas pressure up to 1.2 MPa, which makes it possible to almost fully meet the needs of the gas distribution sphere. The welding technologies of polyethylene pipes are well developed, standardized and automated. \u0000An important problem for long-term operating polyethylene gas pipelines is the assessment of their technical condition and determination of the residual life. Despite the existing need for work of this kind (for example, in 2022 only in the territory of the Saratov region it was required to carry out technical diagnostics of 8 gas pipelines with a total length of 39.86 km), expert organizations do not have the necessary tool for implementing this task today. Although the mechanism of aging of polyethylene is well known, there are no generally accepted standards for assessing the performance of polyethylene gas pipelines based on a comprehensive accounting of the influence of aging factors that determine their technical condition. \u0000The purpose of this article is to highlight the experience of Giproniigaz JSC in technical diagnostics of polyethylene gas pipelines, as well as to draw the attention of specialists from both the gas industry and academic science to the problem of developing a methodology for technical diagnostics of polyethylene gas pipelines.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"2 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75512275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01247-9
E. Pavlyuchenko, A. V. Grigoriev, S. Y. Kaigorodov, K. N. Sokirko
{"title":"Aspects of the Numerical Simulation of High-Diode Vortex Hydrodiodes","authors":"E. Pavlyuchenko, A. V. Grigoriev, S. Y. Kaigorodov, K. N. Sokirko","doi":"10.1007/s10556-023-01247-9","DOIUrl":"https://doi.org/10.1007/s10556-023-01247-9","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"27 1","pages":"340-346"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139365095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01225-1
{"title":"Chemical and Petroleum Engineering Volume 59, Number 3","authors":"","doi":"10.1007/s10556-023-01225-1","DOIUrl":"https://doi.org/10.1007/s10556-023-01225-1","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"396 1","pages":"183 - 184"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139365964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01244-y
Kh. M. Khanukhov, A. Smorodin, N. V. Chetvertukhin, A. V. Kolomytsev
{"title":"Innovative Technologies and Equipment for the Construction of Small-Tonnage Refrigerated LNG Storage Tanks","authors":"Kh. M. Khanukhov, A. Smorodin, N. V. Chetvertukhin, A. V. Kolomytsev","doi":"10.1007/s10556-023-01244-y","DOIUrl":"https://doi.org/10.1007/s10556-023-01244-y","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"39 1","pages":"317-326"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139365672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01238-w
{"title":"Chemical and Petroleum Engineering Volume 59, Number 4","authors":"","doi":"10.1007/s10556-023-01238-w","DOIUrl":"https://doi.org/10.1007/s10556-023-01238-w","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"22 1","pages":"265-266"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139364709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01249-7
F. R. Ismagilov, D. А. Lenkevich
{"title":"Recovery Heat Exchange Optimization for Feed Preparation of Naphtha Isomerization and Catalytic Reforming Units","authors":"F. R. Ismagilov, D. А. Lenkevich","doi":"10.1007/s10556-023-01249-7","DOIUrl":"https://doi.org/10.1007/s10556-023-01249-7","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"4 1","pages":"296-305"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139364995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.1007/s10556-023-01239-9
M. V. Klykov, T. V. Alushkina, R. G. Khasanov
{"title":"Optimization of Air Coolers Based on Minimum Reduced Cost Criterion","authors":"M. V. Klykov, T. V. Alushkina, R. G. Khasanov","doi":"10.1007/s10556-023-01239-9","DOIUrl":"https://doi.org/10.1007/s10556-023-01239-9","url":null,"abstract":"","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"12 1","pages":"267-280"},"PeriodicalIF":0.3,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139364963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-30DOI: 10.17122/ngdelo-2023-2-56-64
D. Kosmylin, F. F. Davletshin, D. Islamov, V. Fedotov, M. Gayazov
One of the promising methods of geophysical survey of existing wells is active thermometry. The technology for conducting studies by this method includes artificial heating of a section of a metal casing (for example, induction), registration and analysis of temperature changes in the range of thermal exposure. As a result of heat exchange with the heated section of the column, a thermal disturbance is created in the fluid flow moving inside the column or in the behind-the-casing flow channel. The analysis of non-stationary temperature in the process of induction action allows solving actual practical problems, for example, determining the presence of fluid overflows in the space behind the casing string. The paper presents the results of an experimental study of the temperature field in a well with an artificial heat source in relation to the determination of behind-the-casing fluid flows. The azimuth-localized behind-the-casing flow "from bottom to top" in the well sump to the lower working formation is considered. It is shown that the temperature of the metal string itself, which is recorded by temperature sensors pressed against the string and distributed along the azimuth, provides the most information in terms of detecting behind-the-casing fluid movement, the sensitivity of the temperature of the fluid in the casing string to the presence of overflow is much lower. On the curves of the azimuthal temperature distribution of the column, the sector with overflow is marked by a lower temperature relative to other sectors, which is due to the removal of heat from the column due to the behind-the-casing fluid movement. The results of experimental studies have shown that it is possible to determine the behind-the-casing flow by measuring the temperature field directly in the heating interval, as well as upstream of the heater, and both measurements during heating and after the heater is stopped are informative. It has been established that the magnitude of the temperature anomalies formed due to the flow is about several degrees, in this regard, the results of temperature measurements can be confidently used to determine the intervals of behind-the-casing fluid movement in the well.
{"title":"EXPERIMENTAL STUDY OF THE THERMAL FIELD IN THE WELLBORE DURING INDUCTION","authors":"D. Kosmylin, F. F. Davletshin, D. Islamov, V. Fedotov, M. Gayazov","doi":"10.17122/ngdelo-2023-2-56-64","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-2-56-64","url":null,"abstract":"One of the promising methods of geophysical survey of existing wells is active thermometry. The technology for conducting studies by this method includes artificial heating of a section of a metal casing (for example, induction), registration and analysis of temperature changes in the range of thermal exposure. As a result of heat exchange with the heated section of the column, a thermal disturbance is created in the fluid flow moving inside the column or in the behind-the-casing flow channel. The analysis of non-stationary temperature in the process of induction action allows solving actual practical problems, for example, determining the presence of fluid overflows in the space behind the casing string. The paper presents the results of an experimental study of the temperature field in a well with an artificial heat source in relation to the determination of behind-the-casing fluid flows. The azimuth-localized behind-the-casing flow \"from bottom to top\" in the well sump to the lower working formation is considered. It is shown that the temperature of the metal string itself, which is recorded by temperature sensors pressed against the string and distributed along the azimuth, provides the most information in terms of detecting behind-the-casing fluid movement, the sensitivity of the temperature of the fluid in the casing string to the presence of overflow is much lower. On the curves of the azimuthal temperature distribution of the column, the sector with overflow is marked by a lower temperature relative to other sectors, which is due to the removal of heat from the column due to the behind-the-casing fluid movement. The results of experimental studies have shown that it is possible to determine the behind-the-casing flow by measuring the temperature field directly in the heating interval, as well as upstream of the heater, and both measurements during heating and after the heater is stopped are informative. It has been established that the magnitude of the temperature anomalies formed due to the flow is about several degrees, in this regard, the results of temperature measurements can be confidently used to determine the intervals of behind-the-casing fluid movement in the well.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"102 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87013517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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