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CO2.assisted steam flooding in late steam flooding in heavy oil reservoirs

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Petroleum Exploration and Development 2019年第6期46卷 1242-1250页

作者： xi Changfeng QI Zongyao ZHANG Yunjun LIU Tong SHEN Dehuang MU Hetaer DONG Hong LI xiuluan JIANG Youwei WANG Hongzhuang State Key Laboratory of Enhanced Oil Recovery PetroChina Research Institute of Exploration&DevelopmentBeijing 100083China research institute of Petroleum Exploration&Development PetroChinaBeijing 100083China research institute of Petroleum Exploration&Development PetroChina Xinjiang Oilfield CompanyKaramary 834000China

To improve the oil recovery and economic efficiency in heavy oil reservoirs in late steam flooding,taking J6 Block of xinjiang Oilfield as the research object,3D physical modeling experiments of steam flooding,CO2.foam assisted steam flooding,and CO2.assisted steam flooding under different perforation conditions are conducted,and CO2.assisted steam flooding is proposed for reservoirs in the late stage of steam *** experimental results show that after adjusting the perforation in late steam flooding,the CO2.assisted steam flooding formed a lateral expansion of the steam chamber in the middle and lower parts of the injection well and a development mode for the production of overriding gravity oil drainage in the top chamber of the production well;high temperature water,oil,and CO2.formed stable low-viscosity quasi-single-phase emulsified fluid;and CO2.acted as a thermal insulation in the steam chamber at the top,reduced the steam partial pressure inside the steam chamber,and effectively improved the heat efficiency of injected *** on the three-dimensional physical experiments and the developed situation of the J6 block in xinjiang Oilfield,the CO2.assisted steam flooding for the J6 block was *** application showed that the CO2.assisted steam flooding made the oil vapor ratio increase from 0.12.to 0.16 by 34.0%,the oil recovery increase from 16.1%to 2..5%,and the final oil recovery goes up to 66.5%compared to steam flooding after perforation adjustment.

关键词： heavy oil reservoir three-dimensional physical simulation experiment steam flooding CO2 assisted steam flooding steam chamber steam(CO2.chamber overriding gravity drainage

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中国科举博物馆,南京,江苏,中国

世界建筑 2024年第3期 36-37页

作者：无肖莉王毛真项阳(绘图) 罗婧高元丰(绘图) 王文韬李少翀杨曦席鸿甘超黄文滔董婧吴崇山王涛张震王丽阳吴迪(绘图) 曹睿(绘图) 吕恒中(摄影) 西安建筑科技大学设计研究总院有限公司不详

南京中国科举博物馆位于中国古代最大科举考场——“江南贡院”旧址,是夫子庙历史文化街区的重要组成部分,自1905年科举制度被废,贡院土地先后被现代建筑占据,仅存明远楼等少数遗存均淹没在仿古建筑群中,真假难辨、保护堪忧。

关键词：历史文化街区真假难辨江南贡院博物馆夫子庙科举明远楼

Effect of multiple parameters on the supersonic gas-jet target characteristics for laser wakefield acceleration

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Nuclear Science and Techniques 2021年第7期32卷 90-98页

作者： Qiu-Shi Liu Ming-Jiang Ma Bao-Zhen Zhao xiao-Hua Zhang Chong Lv xiang-Hao Meng Ji Zhang xiao-Na Ban Zhao Wang xiao-Feng xi Bao-xian Tian Chuang-Ye He Bing Guo Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413China

The supersonic gas-jet target is an important experimental target for laser wakefield acceleration(LWFA),which has great potential for driving novel radiation sources such as betatron radiation and Compton scattering gamma *** to different electron acceleration requirements,it is necessary to provide specific supersonic gas jets with different density profiles to generate electron beams with high quality and high repetition *** this study,the interference images and density profiles of different gas-jet targets were obtained through a modified Nomarski interference diagnosis *** relationships between the gas density and back pressure,nozzle structure,and other key parameters were *** with different characteristics are conducive to meeting the various requirements of LWFA.

关键词： Supersonic gas-jet target Laser wakefield acceleration Electron acceleration Optical interference diagnosis

A Group Collaborative Evaluation Method Based on Web2

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A Group Collaborative Evaluation Method Based on Web2

THE RELATIONSHIP BETWEEN THE EXPRESSION OF KIR' REPERTOIRE IN DECIDUA AND UNEXPLAINED SPONTANEOUS ABORTION

2.11 World Congress on Engineering and Technology(CET 2.11)

作者： Li Yu School of Information Renmin University of china Beijing P. R. china Meiyun Zuo School of Information Renmin University of china Beijing P. R. china xi Jiang School of Information Renmin University of china Beijing P. R. china

Evaluation is one of most important issues in management science. Enlightened by Web2.0, in this paper, the idea on collaboration is employed in management evaluation, and a new management evaluation method, Collaborative Evaluation （CE） is proposed. Its advantage, disadvantage and application processes are detailed. A special CE method is designed, and is verified in the experiment. The experiment shows there is great advantage for CE method over traditional method.

关键词： Collaborative Evaluation Evaluation Theory Evaluation Method Web2.0 Collaborative Management

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THE RELATIONSHIP BETWEEN THE EXPRESSION OF KIR' REPERTOIRE I...

research on the gully forming in the gully region of Yanhe River Basin and process of geological disasters

The 5th International Conference on Reproductive Endocrinology

作者： Hong Yan Wang xi-peng Lin Qi-de Department of Obstetrics and Gynecology,Renji Hospital,Shanghai Second Medical University,Shanghai,china

Objectives:To investigate the relationship between the expression of KIR’ repertoire in decidua and the outcome of pregnancy. Methods:A total of 95 women enrolled in this study,were divided into 3 *** were 41 women with termination of normal pregnancy in group 1;16 women with unexplained recurrent spontaneous abortion in group 2.38 women with unexplained sporadic spontaneous abortion in group

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Journal of Groundwater Science and Engineering 2015年第1期3卷 30-38页

作者： CHANG Yuan DONG Qi LI xi-tao NI Wen-juan Shaanxi Nuclear Industry Geology surveying institute Ministry of Information Industry Electronic Integrated Survey research institute Chang’an University

In recent years, the frequency of geological disasters gradually increases in the gully region of the Loess Plateaus centred with Yanhe River Basin. The research on the forming of the geological disasters in gully region and the disaster process will help us further understand the development of geological disasters and the disaster process. According to the detailed survey of geological disasters in Yan’an City, the river and gully erosion is the main natural predisposing factor that caused the geological disasters in the river gully region. In the forming of ditches and gullies, the surface water system changes the stress form of the original slope and reduces the strength combination of the slope in ways of water erosion and gravity erosion. Gully’s forming stage and stratigraphic contact form have some influence on the geological disasters and disaster process.

关键词： Yanhe River Basin Loess Gully Erosion Disaster process

A NEW MODEL FOR ESTIMATION OF DIFFUSION COEFFICIENT OF PHENOL DESORPTION WITHIN POLYMERIC RESIN UNDER ULTRASOUND

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Chinese Journal of Reactive Polymers 2002年第1期11卷 1-10页

作者： LI xiangbin ZHAO Yuechun xiA Qibin xi Hongxia LI Zhong research institute ofChemical Engineering South China University of Technology Guangzhou 510640P.R.China College of Science South China Agricultural UniversityGuangzhou 510642China

A new model, phase equilibrium-kinetics model (PEKM), for estimation of diffusion coefficient was proposed in this paper. Kinetic experiments of phenol desorption on NKAII resin in the presence and the absence of ultrasound were separately conducted, and diffusion coefficients of phenol within an adsorbent particle were estimated by means of proposed PEKM and classic simplified model. Results show that the use of ultrasound not only changes the phase equilibrium state of NKA II resin/phenol/water system which had been equilibrium at normal condition, but also enhances diffusion of phenol within the resin. The diffusion coefficient of phenol in the resin in the field of ultrasound increases in an order of magnitude in comparison with the diffusion coefficient determined under no ultrasound. Experimental results also indicated that the diffusion coefficients estimated by PEKM were more accurate than that estimated by the classic simplified model.

关键词： Ultrasound Diffusion coefficient PEKM Classic simplified model Phenol Desorption NKAII resin

Tourist behavior patterns in the ecotourism destination in the west of china: A case study of Gannan Tibetan Autonomous Prefecture

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Ecological Economy 2016年第1期9卷 18-29页

作者： ZHANG xi-yue CHEN Tian YU Hu WU Tie-hong institute of Geographic Sciences and Natural Resources research CAS University of Chinese Academy of Sciences College of History and Tourism Culture Inner Mongolia University

This study takes Gannan Tibetan Autonomous Prefecture as the place of case study and tourists as research objects. From the perspectives of geographical distribution of source tourist markets, Tourist activity behavioral and spatial patterns of Tourists, this study looks into the geographical structure of the source tourists and spatial patterns by geography. The analysis of 341 questionnaires on tourists shows that:(1) The tourism cycle of Gannan is in the development phase, competing with adjacent Aba, and greatly impacted by the substitution effect and shadow effect of Aba.(2. The spatial distribution of tourist sources is concentrated, indicating that Gannan is a regional tourism destination. The temporal distance of tourists is mainly concentrated within the 6-hour traffi c circle.(3) Gannan Tibetan Autonomous Prefecture has already become the composite tourist destination dominated by leisure vacation. The minority folkcustom and special landscape are the most attractive tourism resources. Due to the impact of man-land harmonious lifestyle in the tourist areas, the environmental attitude of tourists is improved, and the transportation and shopping are the most vulnerable links in tourism service in Gannan Tibetan Autonomous Prefecture.(4) The spatial behavior of tourists in Gannan is mainly of single-destination style(52.), Transit leg and circle tour style(7%) as well as circle tour style(41%). The spatial distribution of tourist fl ow in Gannan shows a signifi cant feature "more in the north, less in the south and dependent on National Road". Tourism resources, transport facilities, regional competition and lack of route connecting different ecological units are important causes of the spatial distribution of self-help tourists.

关键词： ecotourism tourist activity behavior spatial behavior pattern Gannan Tibetan Autonomous Prefecture

Current Status and Recent Advances in Preimplantation Genetic Testing for Structural Rearrangements

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Reproductive and Developmental Medicine 2020年第1期4卷 1-6页

作者： Shuo Zhang Cai-xia Lei xiao-xi Sun Cong-Jian Xu Department of Genetics Shanghai Ji Ai Genetics and IVF InstituteObstetrics and Gynecology HospitalFudan UniversityShanghai 200011China Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Obstetrics and Gynecology HospitalFudan UniversityShanghai 200011China

Preimplantation genetic testing(PGT)is an early form of prenatal genetic diagnosis,which can identify the abnormal embryos cultured in vitro,allow only transfer of genetically normal embryos,and improve the pregnancy *** recent years,the rapid development of microarrays and next-generation sequencing(NGS)technologies has remarkably accelerated the clinical application of *** particular,a variety of detection methods have emerged and achieved significant progress in PGT for structural rearrangements(PGT-SR).The detection-related abilities of these methods range from the detection of limited chromosome aneuploidy to comprehensive chromosome screening of the whole genome to differentiation of embryos with normal or balanced translocation/inversion *** this study,we reviewed PGT-SR-related detection techniques to provide a better reference for clinical application and *** have also discussed the potential development of novel techniques in the future.

关键词： Chromosome Aneuploidy Inversion Karyotype Preimplantation Genetic Testing Structural Chromosomal Rearrangement Structural Rearrangement Translocation Karyotype