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Phase Transitions and Seepage Characteristics during the Depletion development of Deep Condensate Gas Reservoirs

Energy Engineering 2024年第10期121卷 2797-2823页

作者： Qiang Liu Rujun Wang Yintao Zhang Chong Sun Meichun Yang Yuliang Su Wendong Wang Ying Shi Zheng Chen Exploration and development Technology Research and development Center of Ultra-Deep Complex Oil and Gas Reservoirs Petro China Tarim Oilfield CompanyKorla841000China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China

Deep condensate gas reservoirs exhibit highly complex and variable phase behaviors,making it crucial to understand the relationship between fluid phase states and flow *** study conducts a comprehensive analysis of the actual production process of the deep condensate gas well A1 in a certain oilfield in *** phase behavior analysis and CMG software simulations,the study systematically investigates phase transitions,viscosity,and density changes in the gas and liquid phases under different pressure conditions,with a reservoir temperature of 165°*** research covers three crucial depletion stages of the reservoir:single-phase flow,two-phase transition,and two-phase *** findings indicate that retrograde condensation occurs when the pressure falls below the dew point pressure,reachingmaximum condensate liquid production at around *** pressure decreases,gas phase density and viscosity gradually decrease,while liquid phase density and viscosity show an increasing *** the initial single-phase flow stage,maintaining a consistent gas-oil ratio is observed when both bottom-hole and reservoir pressures are higher than the dew point ***,a sudden drop in bottom-hole pressure below the dew point triggers the production of condensate oil,significantly reducing subsequent gas and oil *** the transitional two-phase flow stage,as the bottom-hole pressure further decreases,the reservoir exhibits a complex flow regime with coexisting areas of gas and *** the subsequent two-phase flow stage,when both bottom-hole and reservoir pressures are below the dew point pressure,a significant increase in the gas-oil ratio is *** reservoir manifests a two-phase flow regime,devoid of single-phase gas flow *** lowpressure conditions in deep condensate gas reservoirs,considerations include gas injection,gas lift,and cyclic gas injection and production in surrounding ***,techniques such as hot nitrogen or CO

关键词： Deep condensate gas reservoirs depletion development phase behavior percolation laws dynamic production analysis

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Structural characteristics and drivers of greenhouse gas emissions at county-level and long-time scales:A case study of the Anji County,China

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Journal of Environmental Sciences 2024年第6期140卷 319-330页

作者： Zhouxiang Cai Liting Hu Di Chen Ying Zhang Xuekun Fang College of Environmental&Resource Sciences Zhejiang UniversityHangzhou 310058China Center for Global Change Science Massachusetts Institute of TechnologyCambridgeMA 02139United States Anji Meteorological bureau Anji 313300China

To achieve carbon neutrality,the Chinese government needs to gain a comprehensive understanding of the sources and drivers of greenhouse gas(GHG)emissions,particularly at the county *** County in eastern China is a typical example of an industrial transformation from quarrying to a low-carbon *** study analyzed the decoupling types and structural characteristics of GHG emissions and the driving factors of carbon dioxide(CO_(2))emissions in the Anji from 2006 to 2019,and explored the differences between countylevel and provincial-level or city-level *** was observed that energy-related activities are the main source of GHG emissions in Anji and that economic development is the driving factor behind the increasing CO_(2)***,industrial transformation and upgradation coupled with the alternative use of clean energy limit the growth of GHG *** study details the GHG emissions of county during the industrial transformation stage and provides corresponding policy recommendations for county governments.

关键词： County GHG emissions Decoupling Driving factors Policy recommendations

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Multiscale spatiotemporal meteorological drought prediction:A deep learning approach

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Advances in Climate Change Research 2024年第2期15卷 211-221页

作者： Jia-Li ZHANG Xiao-Meng HUANG Yu-Ze SUN Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModellingInstitute for Global Change StudiesTsinghua UniversityBeijing 100084China

Reliable monitoring and thorough spatiotemporal prediction of meteorological drought are crucial for early warning and decision-making regarding drought-related *** utilisation of multiscale methods is effective for a comprehensive evaluation of drought occurrence and progression,given the complex nature of meteorological ***,the nonlinear spatiotemporal features of meteorological droughts,influenced by various climatological,physical and environmental factors,pose significant challenges to integrated prediction that considers multiple indicators and time *** address these constraints,we introduce an innovative deep learning framework based on the shifted window transformer,designed for executing spatiotemporal prediction of meteorological drought across multiple *** formulate four prediction indicators using the standardized precipitation index and the standard precipitation evaporation index as core methods for drought definition using the ERA5 reanalysis *** indicators span time scales of approximately 30 d and one ***-term indicators capture more anomalous variations,whereas long-term indicators attain comparatively higher accuracy in predicting future *** focus on the East Asian region,notable for its diverse climate conditions and intricate terrains,to validate the model's efficacy in addressing the complexities of nonlinear spatiotemporal *** model's performance is evaluated from diverse spatiotemporal viewpoints,and practical application values are analysed by representative drought *** results substantiate the effectiveness of our proposed model in providing accurate multiscale predictions and capturing the spatiotemporal evolution characteristics of *** of the four drought indicators accurately delineates specific facets of the meteorological drought ***,three representative drought events,namely flash drought,sustained drought and severe drought,

关键词： Meteorological drought Spatiotemporal prediction Multiscale Swim transformer Deep learning

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Functional decoration on a regenerable bifunctional porous covalent organic framework probe for rapid detection and adsorption of copper ions

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Rare Metals 2024年第2期43卷 758-769页

作者： Yu-Long Li Xi-Lang Jin Yi-Ting Ma Jing-Rui Liu Fazal Raziq Peng-Yuan Zhu Zhi-Feng Deng Hong-Wei Zhou Wei-Xing Chen Wen-Huan Huang School of Materials and Chemical Engineering Xi’an Technological UniversityXi’an710021China Yulin Boyi-Jingking Research Institute of Industrial Technology development Research Yulin719054China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900ThuwalKingdom of Saudi Arabia Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi’an710021China National and Local Joint Engineering Laboratory for Slag comprehensive Utilization and Environmental Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong723001China

Developing fluorescence porous probe for detecting and eliminating Cu^(2+) contamination in water or biosystem is an essential research project that has attracted considerable ***,improving the fluorescence detecting efficiency while enhancing the adsorption capacity of the porous probe is of great ***,a bifunctional two-dimensional imine-based porous covalent organic framework(TTP-COF)probe was designed and synthesized from 1,3,5-tris(4-aminophenyl)benzene(TAPB)and 2,4,6-Triformylphloroglucinol(TP)***-COF displayed rapid detection of Cu^(2+)(limit of detection(LOD)=10 nmol·L^(−1) while achieving a high adsorption capacity of 214 mg·g^(−1)(pH=6)at room temperature with high reusability(>5 cycles).The key roles and contributions of highπ-conjugate and delocalized electrons in TABP and functional–OH groups in TP were *** importantly,the fluorescence quenching mechanism of TTP-COF was studied by density functional theory theoretical calculations,revealing the crucial role of intramolecular hydrogen bonds among C=N and–OH groups and the blocking of the excited state intramolecular proton transfer process in detecting process of Cu^(2+).

关键词： Covalent organic framework(COF) Excited-state intramolecular proton transfer(ESIPT) Copper ion detection Copper ion adsorption Renewability

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Global multifaceted biodiversity patterns,centers,and conservation needs in angiosperms

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Science China(Life Sciences) 2024年第4期67卷 817-828页

作者： Ao Luo Yaoqi Li Nawal Shrestha Xiaoting Xu Xiangyan Su Yichao Li Tong Lyu Kilara Waris Zhiyao Tang Xiaojuan Liu Luxiang Lin Yongsheng Chen Kuiling Zu Wenqi Song Shijia Peng Niklaus E.Zimmermann Loïc Pellissier Zhiheng Wang Institute of Ecology and Key Laboratory for Earth Surface Processes of the ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871China Department of Health and Environmental Sciences Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China State Key Laboratory of Grassland Agro-Ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Key Laboratory of Bio-Resource and Eco-Environment of ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China Land Consolidation and Rehabilitation Center Ministry of Natural ResourcesBeijing 100035China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunming 650201China Swiss Federal Research Institute WSL Birmensdorf 8903Switzerland Department of Environmental Systems Science ETH ZürichZürich 8092Switzerland

The Convention on Biological Diversity seeks to conserve at least 30%of global land and water areas by 2030,which is a challenge but also an opportunity to better preserve biodiversity,including flowering plants(angiosperms).Herein,we compiled a large database on distributions of over 300,000 angiosperm species and the key functional traits of 67,024 *** this database,we constructed biodiversity-environment models to predict global patterns of taxonomic,phylogenetic,and functional diversity in terrestrial angiosperms and provide a comprehensive mapping of the three diversity *** further evaluated the current protection status of the biodiversity centers of these diversity *** results showed that geographical patterns of the three facets of plant diversity exhibited substantial spatial mismatches and nonoverlapping conservation *** centers of functional diversity,particularly of herbaceous species,were primarily distributed in temperate regions and under weaker protection compared with other biodiversity centers of taxonomic and phylogenetic *** global assessment of multifaceted biodiversity patterns and centers highlights the insufficiency and unbalanced conservation among the three diversity facets and the two growth forms(woody ***),thus providing directions for guiding the future conservation of global plant diversity.

关键词： angiosperms species richness phylogenetic diversity functional diversity plant traits woody species herbaceous species

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Slope runoff study in situ using rainfall simulator in mountainous area of North China

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Journal of Geographical Sciences 2009年第4期19卷 461-470页

作者：于静洁杨聪刘昌明宋献方胡珊珊李发东唐常源 Key Laboratory of water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchCAS bureau of comprehensive development Ministry of Water Resources Graduate University of Chinese Academy of Sciences Chiba University

Simulated rainfall is a valid tool to examine the runoff generation on the slope.13 simulated rainfall experiments with different rainfall intensities and durations are completed in a 5 m ×10 m experimental plot in mountainous area of North ***,rainfall,surface runoff,soil-layer flow,mantel-layer flow and soil moisture are monitored *** the results,it is found that the hydrographs in all layers have the characteristics of rapid rise and *** recessions of surface flow and soil-layer flow are much faster than that of mantel-layer *** flow,the main contributor,makes up more than 60% of the total runoff in the study *** even exceeds 90% in the cases of high intensity rainfall *** coefficient(ratio of total runoff to rainfall amount) is mainly influenced by rainfall amount,rainfall intensity and antecedent soil moisture,and the relationship can be well expressed by a multiple linear regression function α = 0.002P + 0.182i + *** relation between the rainfall intensity and the lag time of three flows(surface runoff,soil-layer flow and mantel-layer flow) is shown to be ***,the result also shows that the recession constant is 0.75 for surface runoff,is 0.94 for soil-layer and mantel-layer flow in this *** this study area,the dominant infiltration excess runoff is simulated by Horton *** 0.10 mm/min percolation is observed under the condition of different rainfall intensities,therefore the value is regarded as the steady infiltration rate of the study area.

关键词： simulated rainfall slope plot runoff generation process mountainous area of North China

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Optimization of Extraction Process,Analysis of Polysaccharides from Morchella septimelata

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Agricultural Biotechnology 2024年第4期13卷 40-45页

作者： Ruiling LYU Zhenxing XIE Qiwen TAO Liuyao WANG Peng WU Shiming LI Jun YANG Yongliang ZHENG Hubei Key Laboratory of Economic Forest Germplasm Improvement and resources comprehensive Utilization Hubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie MountainHuanggang Normal UniversityHuanggang 438000China Department of Food Science Rutgers UniversityNew BrunswickNJ 07102USA Huanggang Academy of Agricultural Sciences Huanggang 438000China

Morchella septimelata polysaccharide(MSP)possesses multiple biological *** this study,double enzyme method was used to extract polysaccharides from Morchella *** basis of single factor experiment and response surface design was used to optimize the extraction process of *** optimal extraction conditions of polysaccharide were as follows:extraction time 2 h,extraction temperature 40.5℃,solid-liquid ratio 1:15(w/v),and the amount of double enzyme(cellulase:β-glucanase,mass ratio 1:2)2.0%.Under these conditions,the extraction yield of polysaccharide reached(14.86±0.12)%.

关键词： Morchella septimelata Polysaccharides extraction Response surface design

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Assessing and Comparing Smallholders’Vulnerability to Climate Change among Countries in the Pan-Third Pole Region

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Journal of resources and Ecology 2024年第4期15卷 1015-1026页

作者： XU Xiangbo XU Ce LI Chang FU Chao ZHOU Yunqiao Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China International Ecosystem Management Partnership United Nations Environment ProgrammeBeijing 100101China Land Consolidation and Rehabilitation Center Ministry of Natural ResourcesBeijing 100035China Technology Innovation Center for Land Engineering Ministry of Natural ResourcesBeijing 100035China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Tibetan Plateau Earth System Resources and EnvironmentInstitute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China

A comprehensive assessment of climate change vulnerability is imperative for formulating effective adaptation strategies and advancing sustainable development *** one of the most climate-vulnerable regions globally,the Pan-Third Pole area lacks transnational vulnerability assessments,which poses a significant obstacle to efficient climate *** study conducted transnational comparisons based on primary micro-survey data collected uniformly across Nepal,Cambodia,Thailand,and Myanmar,which are all located in the Pan-Third Pole *** and comparing the vulnerabilities employed an extended framework of climate change *** findings reveal substantial variations in vulnerability among the countries,with Cambodia exhibiting the highest vulnerability,followed by Thailand,Myanmar,and Nepal in descending order,primarily due to differences in *** exposure to climate change also varied *** scores decreased in the order of Nepal>Cambodia>Thailand>Myanmar,with demographic factors,tap water accessibility,and land being the major contributors and sources of differentiation among the *** adaptability,Thailand demonstrated the highest adaptability,with human and financial capital as the key *** outcomes underscore the need for tailored policy measures addressing the diverse vulnerabilities,including enhancing household disaster prevention and capital ***,targeted international investments are crucial for improving adaptability among smallholders in this unique region.

关键词： climate change vulnerability smallholder sustainable development Pan-Third Pole region

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Reconstructed anti-corrosive and active surface on hierarchically porous carbonized wood for efficient overall seawater electrolysis

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Science Bulletin 2024年第15期69卷 2337-2341页

作者： Zhijie Chen Wenfei Wei Xiaomin Xu Xiaosong Gu Changzhu Huang Wei Wei Zongping Shao Bing-Jie Ni Hong Chen Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control SUSTech Energy Institute for Carbon NeutralitySchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China UNSW water Research Centre School of Civil and Environmental EngineeringThe University of New South WalesSydney 2052Australia Key Laboratory of comprehensive and Highly Efficient Utilization of Salt Lake resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityPerth 6845Australia Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200China Centre for Technology in water and Wastewater School of Civil and Environmental EngineeringUniversity of Technology SydneySydney 2007Australia

Seawater electrolysis for sustainable hydrogen fuel production emerges as an auspicious practice to decarbonize the global energy sector [1]. However, direct seawater electrolysis is severely challenged by the corrosion of anodes by chloride ions, the unwanted chloride oxidation reaction (Cl OR), and the low activity and high cost of catalysts [2].

关键词： corrosion seawater carbon

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Impacts of Climate Change on Seawater Temperature and Total Dissolved Solids: Challenges and Sustainable Solutions for Reverse Osmosis Desalination in the Arabian Gulf Region

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Computational water, Energy, and Environmental Engineering 2024年第1期13卷 86-93页

作者： Ahmed Al Kubaish Jamal Salama water Quality Section Saline Water Conversion Corporation Al-Khobar Saudi Arabia

This article examines the influence of seawater temperature and total dissolved solids (TDS) on reverse osmosis (RO) desalination in the Arabian Gulf region, with a focus on the impact of climate change. The study highlights the changes in seawater temperature and TDS levels over the years and discusses their effects on the efficiency and productivity of RO desalination plants. It emphasizes the importance of monitoring TDS levels and controlling seawater temperature to optimize water production. The article also suggests various solutions, including intensive pre-treatment, development of high-performance membranes, exploration of alternative water sources, and regulation of discharges into the Gulf, to ensure sustainable water supply in the face of rising TDS levels and seawater temperature. Further research and comprehensive monitoring are recommended to understand the implications of these findings and develop effective strategies for the management of marine resources in the Arabian Gulf.

关键词： Climate Change Temperature Reverse Osmosis Seawater Total Dissolved Solids Desalination

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