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Constraints on Characteristics and Distribution of Gas Hydrate and Free Gas Using Broad-Band Processing of Three-Dimensional Seismic Data 被引量:2
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作者 WANG Xiujuan ZHOU Jilin +7 位作者 LI Sanzhong LI Lixia LI Jie LI Yuanping WANG Linfei SU Pibo JIN Jiapeng GONG Zhi 《Journal of Ocean University of China》 SCIE CAS CSCD 2024年第5期1233-1247,共15页
Gas hydrate drilling expeditions in the Pearl River Mouth Basin,South China Sea,have identified concentrated gas hydrates with variable thickness.Moreover,free gas and the coexistence of gas hydrate and free gas have ... Gas hydrate drilling expeditions in the Pearl River Mouth Basin,South China Sea,have identified concentrated gas hydrates with variable thickness.Moreover,free gas and the coexistence of gas hydrate and free gas have been confirmed by logging,coring,and production tests in the foraminifera-rich silty sediments with complex bottom-simulating reflectors(BSRs).The broad-band processing is conducted on conventional three-dimensional(3D)seismic data to improve the image and detection accuracy of gas hydratebearing layers and delineate the saturation and thickness of gas hydrate-and free gas-bearing sediments.Several geophysical attributes extracted along the base of the gas hydrate stability zone are used to demonstrate the variable distribution and the controlling factors for the differential enrichment of gas hydrate.The inverted gas hydrate saturation at the production zone is over 40% with a thickness of 90 m,showing the interbedded distribution with different boundaries between gas hydrate-and free gas-bearing layers.However,the gas hydrate saturation value at the adjacent canyon is 70%,with 30-m-thick patches and linear features.The lithological and fault controls on gas hydrate and free gas distributions are demonstrated by tracing each gas hydrate-bearing layer.Moreover,the BSR depths based on broad-band reprocessed 3D seismic data not only exhibit variations due to small-scale topographic changes caused by seafloor sedimentation and erosion but also show the upward shift of BSR and the blocky distribution of the coexistence of gas hydrate and free gas in the Pearl River Mouth Basin. 展开更多
关键词 gas hydrate free gas shift of BSR broad-band processing
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Geochemistry and origins of hydrogen-containing natural gases in deep Songliao Basin,China:Insights from continental scientific drilling 被引量:1
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作者 Shuang-Biao Han Chao-Han Xiang +3 位作者 Xin Du Lin-Feng Xie Jie Huang Cheng-Shan Wang 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期741-751,共11页
The different reservoirs in deep Songliao Basin have non-homogeneous lithologies and include multiple layers with a high content of hydrogen gas.The gas composition and stable isotope characteristics vary significantl... The different reservoirs in deep Songliao Basin have non-homogeneous lithologies and include multiple layers with a high content of hydrogen gas.The gas composition and stable isotope characteristics vary significantly,but the origin analysis of different gas types has previously been weak.Based on the geochemical parameters of gas samples from different depths and the analysis of geological settings,this research covers the diverse origins of natural gas in different strata.The gas components are mainly methane with a small amount of C_(2+),and non-hydrocarbon gases,including nitrogen(N_(2)),hydrogen(H_(2)),carbon dioxide(CO_(2)),and helium(He).At greater depth,the carbon isotope of methane becomes heavier,and the hydrogen isotope points to a lacustrine sedimentary environment.With increasing depth,the origins of N_(2)and CO_(2)change gradually from a mixture of organic and inorganic to inorganic.The origins of hydrogen gas are complex and include organic sources,water radiolysis,water-rock(Fe^(2+)-containing minerals)reactions,and mantle-derived.The shales of Denglouku and Shahezi Formations,as source rocks,provide the premise for generation and occurrence of organic gas.Furthermore,the deep faults and fluid activities in Basement Formation control the generation and migration of mantle-derived gas.The discovery of a high content of H_(2)in study area not only reveals the organic and inorganic association of natural-gas generation,but also provides a scientific basis for the exploration of deep hydrogen-rich gas. 展开更多
关键词 gas compositions Stable isotopes gas origins Hydrogen gas Songliao Basin
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Deep-large faults controlling on the distribution of the venting gas hydrate system in the middle of the Qiongdongnan Basin, South China Sea 被引量:2
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作者 Jin-feng Ren Hai-jun Qiu +6 位作者 Zeng-gui Kuang Ting-wei Li Yu-lin He Meng-jie Xu Xiao-xue Wang Hong-fei Lai Jin Liang 《China Geology》 CAS CSCD 2024年第1期36-50,共15页
Many locations with concentrated hydrates at vents have confirmed the presence of abundant thermogenic gas in the middle of the Qiongdongnan Basin(QDNB).However,the impact of deep structures on gasbearing fluids migra... Many locations with concentrated hydrates at vents have confirmed the presence of abundant thermogenic gas in the middle of the Qiongdongnan Basin(QDNB).However,the impact of deep structures on gasbearing fluids migration and gas hydrates distribution in tectonically inactive regions is still unclear.In this study,the authors apply high-resolution 3D seismic and logging while drilling(LWD)data from the middle of the QDNB to investigate the influence of deep-large faults on gas chimneys and preferred gasescape pipes.The findings reveal the following:(1)Two significant deep-large faults,F1 and F2,developed on the edge of the Songnan Low Uplift,control the dominant migration of thermogenic hydrocarbons and determine the initial locations of gas chimneys.(2)The formation of gas chimneys is likely related to fault activation and reactivation.Gas chimney 1 is primarily arises from convergent fluid migration resulting from the intersection of the two faults,while the gas chimney 2 benefits from a steeper fault plane and shorter migration distance of fault F2.(3)Most gas-escape pipes are situated near the apex of the two faults.Their reactivations facilitate free gas flow into the GHSZ and contribute to the formation of fracture‐filling hydrates. 展开更多
关键词 Venting gas hydrates Deep-large faults gas chimney gas-escape pipes High-resolution 3D seismic Logging while drilling Qiongdongnan Basin South China Sea
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基于GAS算法的卵砾石粒径自动识别应用研究
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作者 蔡豫豪 高仕赵 +1 位作者 张丛林 董晓明 《泥沙研究》 CAS CSCD 北大核心 2024年第2期9-16,共8页
粒径和级配是表征床面组成的重要指标,基于GAS粒径自动识别技术可自动识别粗粒床面粒径并生成级配曲线,能够大幅提高现场采样和分析的效率。为了验证GAS的分割效果,采用GAS提供的默认参数进行分割,同时应用ImageJ软件手动分割进行验证... 粒径和级配是表征床面组成的重要指标,基于GAS粒径自动识别技术可自动识别粗粒床面粒径并生成级配曲线,能够大幅提高现场采样和分析的效率。为了验证GAS的分割效果,采用GAS提供的默认参数进行分割,同时应用ImageJ软件手动分割进行验证。结果表明:GAS级配曲线的相对误差为5.7%,相关系数为0.992。另外,采用单参数和多参数敏感性分析法来标准化参数调整方案,gre、can1和can2对GAS提取的级配曲线和特征粒径有显著影响,其中gre起主导作用,而can1和can2控制着砾石边界的检测完整性。 展开更多
关键词 粗粒床面 级配曲线 gas算法 数字筛分 图像处理
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Inter-layer interference for multi-layered tight gas reservoir in the absence and presence of movable water 被引量:1
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作者 Tao Zhang Bin-Rui Wang +5 位作者 Yu-Long Zhao Lie-Hui Zhang Xiang-Yang Qiao Lei Zhang Jing-Jing Guo Hung Vo Thanh 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期1751-1764,共14页
Due to the dissimilarity among different producing layers,the influences of inter-layer interference on the production performance of a multi-layer gas reservoir are possible.However,systematic studies of inter-layer ... Due to the dissimilarity among different producing layers,the influences of inter-layer interference on the production performance of a multi-layer gas reservoir are possible.However,systematic studies of inter-layer interference for tight gas reservoirs are really limited,especially for those reservoirs in the presence of water.In this work,five types of possible inter-layer interferences,including both absence and presence of water,are identified for commingled production of tight gas reservoirs.Subsequently,a series of reservoir-scale and pore-scale numerical simulations are conducted to quantify the degree of influence of each type of interference.Consistent field evidence from the Yan'an tight gas reservoir(Ordos Basin,China)is found to support the simulation results.Additionally,suggestions are proposed to mitigate the potential inter-layer interferences.The results indicate that,in the absence of water,commingled production is favorable in two situations:when there is a difference in physical properties and when there is a difference in the pressure system of each layer.For reservoirs with a multi-pressure system,the backflow phenomenon,which significantly influences the production performance,only occurs under extreme conditions(such as very low production rates or well shut-in periods).When water is introduced into the multi-layer system,inter-layer interference becomes nearly inevitable.Perforating both the gas-rich layer and water-rich layer for commingled production is not desirable,as it can trigger water invasion from the water-rich layer into the gas-rich layer.The gas-rich layer might also be interfered with by water from the neighboring unperforated water-rich layer,where the water might break the barrier(eg weak joint surface,cement in fractures)between the two layers and migrate into the gas-rich layer.Additionally,the gas-rich layer could possibly be interfered with by water that accumulates at the bottom of the wellbore due to gravitational differentiation during shut-in operations. 展开更多
关键词 Tight gas Comingled production INTERFERENCE Two-phase flow Water blocking
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Geochemical characteristics and exploration significance of ultra-deep Sinian oil and gas from Well Tashen 5,Tarim Basin,NW China 被引量:2
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作者 Zicheng Cao Anlai Ma +4 位作者 Qinqi Xu Quanyong Pan Kai Shang Fan Feng Yongli Liu 《Energy Geoscience》 EI 2024年第1期24-36,共13页
The Well Tashen 5(TS5),drilled and completed at a vertical depth of 9017 m in the Tabei Uplift of the Tarim Basin,NW China,is the deepest well in Asia.It has been producing both oil and gas from the Sinian at a depth ... The Well Tashen 5(TS5),drilled and completed at a vertical depth of 9017 m in the Tabei Uplift of the Tarim Basin,NW China,is the deepest well in Asia.It has been producing both oil and gas from the Sinian at a depth of 8780e8840 m,also the deepest in Asia in terms of oil discovery.In this paper,the geochemical characteristics of Sinian oil and gas from the well were investigated and compared with those of Cambrian oil and gas discovered in the same basin.The oil samples,with Pr/Ph ratio of 0.78 and a whole oil carbon isotopic value of31.6‰,have geochemical characteristics similar to those of Ordovician oils from the No.1 fault in the North Shuntuoguole area(also named Shunbei area)and the Middle Cambrian oil from wells Zhongshen 1(ZS1)and Zhongshen 5(ZS5)of Tazhong Uplift.The maturity of light hydrocarbons,diamondoids and aromatic fractions all suggest an approximate maturity of 1.5%e1.7%Ro for the samples.The(4-+3-)methyldiamantane concentration of the samples is 113.5 mg/g,indicating intense cracking with a cracking degree of about 80%,which is consistent with the high bottom hole temperature(179℃).The Sinian gas samples are dry with a dryness coefficient of 0.97.The gas is a mixture of kerogen-cracking gas and oil-cracking gas and has Ro values ranging between 1.5%and 1.7%,and methane carbon isotopic values of41.6‰.Based on the equivalent vitrinite reflectance(R_(eqv)=1.51%e1.61%)and the thermal evolution of source rocks from the Cambrian Yu'ertusi Formation of the same well,it is proposed that the Sinian oil and gas be mainly sourced from the Cambrian Yu'ertusi Formation during the Himalayan period but probably also be joined by hydrocarbon of higher maturity that migrated from other source rocks in deeper formations.The discovery of Sinian oil and gas from Well TS5 suggests that the ancient ultra-deep strata in the northern Tarim Basin have the potential for finding volatile oil or condensate reservoirs. 展开更多
关键词 Ultra-deep Sinian oil and gas Oil-cracking Well Tashen 5 Tarim Basin
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Repositioning fertilizer manufacturing subsidies for improving food security and reducing greenhouse gas emissions in China 被引量:1
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作者 Zongyi Wu Xiaolong Feng +1 位作者 Yumei Zhang Shenggen Fan 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2024年第2期430-443,共14页
China removed fertilizer manufacturing subsidies from 2015 to 2018 to bolster market-oriented reforms and foster environmentally sustainable practices.However,the impact of this policy reform on food security and the ... China removed fertilizer manufacturing subsidies from 2015 to 2018 to bolster market-oriented reforms and foster environmentally sustainable practices.However,the impact of this policy reform on food security and the environment remains inadequately evaluated.Moreover,although green and low-carbon technologies offer environmental advantages,their widespread adoption is hindered by prohibitively high costs.This study analyzes the impact of removing fertilizer manufacturing subsidies and explores the potential feasibility of redirecting fertilizer manufacturing subsidies to invest in the diffusion of these technologies.Utilizing the China Agricultural University Agri-food Systems model,we analyzed the potential for achieving mutually beneficial outcomes regarding food security and environmental sustainability.The findings indicate that removing fertilizer manufacturing subsidies has reduced greenhouse gas(GHG)emissions from agricultural activities by 3.88 million metric tons,with minimal impact on food production.Redirecting fertilizer manufacturing subsidies to invest in green and low-carbon technologies,including slow and controlled-release fertilizer,organic-inorganic compound fertilizers,and machine deep placement of fertilizer,emerges as a strategy to concurrently curtail GHG emissions,ensure food security,and secure robust economic returns.Finally,we propose a comprehensive set of government interventions,including subsidies,field guidance,and improved extension systems,to promote the widespread adoption of these technologies. 展开更多
关键词 food security fertilizer manufacturing subsidies agri-food systems greenhouse gas emissions
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Risk assessment of oil and gas investment environment in countries along the Belt and Road Initiative 被引量:1
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作者 Bao-Jun Tang Chang-Jing Ji +3 位作者 Yu-Xian Zheng Kang-Ning Liu Yi-Fei Ma Jun-Yu Chen 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1429-1443,共15页
With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of inv... With the implementation of the Belt and Road Initiative, China is deepening its cooperation in oil and gas resources with countries along the Initiative. In order to better mitigate risks and enhance the safety of investments, it is of significant importance to research the oil and gas investment environment in these countries for China's overseas investment macro-layout. This paper proposes an indicator system including 27 indicators from 6 dimensions. On this basis, game theory models combined with global entropy method and analytic hierarchy process are applied to determine the combined weights, and the TOPSIS-GRA model is utilized to assess the risks of oil and gas investment in 76 countries along the Initiative from 2014 to 2021. Finally, the GM(1,1) model is employed to predict risk values for 2022-2025. In conclusion, oil and gas resources and political factors have the greatest impact on investment environment risk, and 12 countries with greater investment potential are selected through cluster analysis in conjunction with the predicted results. The research findings may provide scientific decisionmaking recommendations for the Chinese government and oil enterprises to strengthen oil and gas investment cooperation with countries along the Belt and Road Initiative. 展开更多
关键词 Belt and Road Initiative Oil and gas Investment Risk assessment
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Geological characteristics and exploration breakthroughs of coal rock gas in Carboniferous Benxi Formation,Ordos Basin,NW China 被引量:2
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作者 ZHAO Zhe XU Wanglin +8 位作者 ZHAO Zhenyu YI Shiwei YANG Wei ZHANG Yueqiao SUN Yuanshi ZHAO Weibo SHI Yunhe ZHANG Chunlin GAO Jianrong 《Petroleum Exploration and Development》 SCIE 2024年第2期262-278,共17页
To explore the geological characteristics and exploration potential of the Carboniferous Benxi Formation coal rock gas in the Ordos Basin,this paper presents a systematic research on the coal rock distribution,coal ro... To explore the geological characteristics and exploration potential of the Carboniferous Benxi Formation coal rock gas in the Ordos Basin,this paper presents a systematic research on the coal rock distribution,coal rock reservoirs,coal rock quality,and coal rock gas features,resources and enrichment.Coal rock gas is a high-quality resource distinct from coalbed methane,and it has unique features in terms of burial depth,gas source,reservoir,gas content,and carbon isotopic composition.The Benxi Formation coal rocks cover an area of 16×104km^(2),with thicknesses ranging from 2 m to 25 m,primarily consisting of bright and semi-bright coals with primitive structures and low volatile and ash contents,indicating a good coal quality.The medium-to-high rank coal rocks have the total organic carbon(TOC)content ranging from 33.49%to 86.11%,averaging75.16%.They have a high degree of thermal evolution(Roof 1.2%-2.8%),and a high gas-generating capacity.They also have high stable carbon isotopic values(δ13C1of-37.6‰to-16‰;δ13C2of-21.7‰to-14.3‰).Deep coal rocks develop matrix pores such as gas bubble pores,organic pores,and inorganic mineral pores,which,together with cleats and fractures,form good reservoir spaces.The coal rock reservoirs exhibit the porosity of 0.54%-10.67%(averaging 5.42%)and the permeability of(0.001-14.600)×10^(-3)μm^(2)(averaging 2.32×10^(-3)μm^(2)).Vertically,there are five types of coal rock gas accumulation and dissipation combinations,among which the coal rock-mudstone gas accumulation combination and the coal rock-limestone gas accumulation combination are the most important,with good sealing conditions and high peak values of total hydrocarbon in gas logging.A model of coal rock gas accumulation has been constructed,which includes widespread distribution of medium-to-high rank coal rocks continually generating gas,matrix pores and cleats/fractures in coal rocks acting as large-scale reservoir spaces,tight cap rocks providing sealing,source-reservoir integration,and five types of efficient enrichment patterns(lateral pinchout complex,lenses,low-amplitude structures,nose-like structures,and lithologically self-sealing).According to the geological characteristics of coal rock gas,the Benxi Formation is divided into 8 plays,and the estimated coal rock gas resources with a buried depth of more than 2000 m are more than 12.33×10^(12)m^(3).The above understandings guide the deployment of risk exploration.Two wells drilled accordingly obtained an industrial gas flow,driving the further deployment of exploratory and appraisal wells.Substantial breakthroughs have been achieved,with the possible reserves over a trillion cubic meters and the proved reserves over a hundred billion cubic meters,which is of great significance for the reserves increase and efficient development of natural gas in China. 展开更多
关键词 coal rock gas coalbed methane medium-to-high rank coal CLEAT Ordos Basin Carboniferous Benxi Formation risk exploration
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Development and technology status of energy storage in depleted gas reservoirs 被引量:1
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作者 Jifang Wan Yangqing Sun +4 位作者 Yuxian He Wendong Ji Jingcui Li Liangliang Jiang Maria Jose Jurado 《International Journal of Coal Science & Technology》 EI CAS CSCD 2024年第2期198-221,共24页
Utilizing energy storage in depleted oil and gas reservoirs can improve productivity while reducing power costs and is one of the best ways to achieve synergistic development of"Carbon Peak–Carbon Neutral"a... Utilizing energy storage in depleted oil and gas reservoirs can improve productivity while reducing power costs and is one of the best ways to achieve synergistic development of"Carbon Peak–Carbon Neutral"and"Underground Resource Utiliza-tion".Starting from the development of Compressed Air Energy Storage(CAES)technology,the site selection of CAES in depleted gas and oil reservoirs,the evolution mechanism of reservoir dynamic sealing,and the high-flow CAES and injection technology are summarized.It focuses on analyzing the characteristics,key equipment,reservoir construction,application scenarios and cost analysis of CAES projects,and sorting out the technical key points and existing difficulties.The devel-opment trend of CAES technology is proposed,and the future development path is scrutinized to provide reference for the research of CAES projects in depleted oil and gas reservoirs. 展开更多
关键词 Depleted gas reservoirs Technology and development Siting analysis Safety evaluation Compressed air energy storage
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Miscibility of light oil and flue gas under thermal action 被引量:1
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作者 XI Changfeng WANG Bojun +7 位作者 ZHAO Fang HUA Daode QI Zongyao LIU Tong ZHAO Zeqi TANG Junshi ZHOU You WANG Hongzhuang 《Petroleum Exploration and Development》 SCIE 2024年第1期164-171,共8页
The miscibility of flue gas and different types of light oils is investigated through slender-tube miscible displacement experiment at high temperature and high pressure.Under the conditions of high temperature and hi... The miscibility of flue gas and different types of light oils is investigated through slender-tube miscible displacement experiment at high temperature and high pressure.Under the conditions of high temperature and high pressure,the miscible displacement of flue gas and light oil is possible.At the same temperature,there is a linear relationship between oil displacement efficiency and pressure.At the same pressure,the oil displacement efficiency increases gently and then rapidly to more than 90% to achieve miscible displacement with the increase of temperature.The rapid increase of oil displacement efficiency is closely related to the process that the light components of oil transit in phase state due to distillation with the rise of temperature.Moreover,at the same pressure,the lighter the oil,the lower the minimum miscibility temperature between flue gas and oil,which allows easier miscibility and ultimately better performance of thermal miscible flooding by air injection.The miscibility between flue gas and light oil at high temperature and high pressure is more typically characterized by phase transition at high temperature in supercritical state,and it is different from the contact extraction miscibility of CO_(2) under conventional high pressure conditions. 展开更多
关键词 light oil flue gas flooding thermal miscible flooding miscible law distillation phase transition minimum miscible pressure minimum miscible temperature
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Characteristics of carbon isotopic composition of alkane gas in large gas fields in China
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作者 DAI Jinxing NI Yunyan +4 位作者 GONG Deyu HUANG Shipeng LIU Quanyou HONG Feng ZHANG Yanling 《Petroleum Exploration and Development》 SCIE 2024年第2期251-261,共11页
Exploration and development of large gas fields is an important way for a country to rapidly develop its natural gas industry.From 1991 to 2020,China discovered 68 new large gas fields,boosting its annual gas output t... Exploration and development of large gas fields is an important way for a country to rapidly develop its natural gas industry.From 1991 to 2020,China discovered 68 new large gas fields,boosting its annual gas output to 1925×108m3in 2020,making it the fourth largest gas-producing country in the world.Based on 1696 molecular components and carbon isotopic composition data of alkane gas in 70 large gas fields in China,the characteristics of carbon isotopic composition of alkane gas in large gas fields in China were obtained.The lightest and average values ofδ^(13)C_(1),δ13C2,δ13C3andδ13C4become heavier with increasing carbon number,while the heaviest values ofδ^(13)C_(1),δ13C2,δ13C3andδ13C4become lighter with increasing carbon number.Theδ^(13)C_(1)values of large gas fields in China range from-71.2‰to-11.4‰(specifically,from-71.2‰to-56.4‰for bacterial gas,from-54.4‰to-21.6‰for oil-related gas,from-49.3‰to-18.9‰for coal-derived gas,and from-35.6‰to-11.4‰for abiogenic gas).Based on these data,theδ^(13)C_(1)chart of large gas fields in China was plotted.Moreover,theδ^(13)C_(1)values of natural gas in China range from-107.1‰to-8.9‰,specifically,from-1071%o to-55.1‰for bacterial gas,from-54.4‰to-21.6‰for oil-related gas,from-49.3‰to-13.3‰for coal-derived gas,and from-36.2‰to-8.9‰for abiogenic gas.Based on these data,theδ^(13)C_(1)chart of natural gas in China was plotted. 展开更多
关键词 China large gas field bacterial gas oil-related gas coal-derived gas abiogenic gas alkane gas carbon isotopic composition δ^(13)C_(1)chart
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MXene Key Composites:A New Arena for Gas Sensors
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作者 Yitong Wang Yuhua Wang +2 位作者 Min Jian Qinting Jiang Xifei Li 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第10期350-391,共42页
With the development of science and technology,the scale of industrial production continues to grow,and the types and quantities of gas raw materials used in industrial production and produced during the production pr... With the development of science and technology,the scale of industrial production continues to grow,and the types and quantities of gas raw materials used in industrial production and produced during the production process are also constantly increasing.These gases include flammable and explosive gases,and even contain toxic gases.Therefore,it is very important and necessary for gas sensors to detect and monitor these gases quickly and accurately.In recent years,a new two-dimensional material called MXene has attracted widespread attention in various applications.Their abundant surface functional groups and sites,excellent current conductivity,tunable surface chemistry,and outstanding stability make them promising for gas sensor applications.Since the birth of MXene materials,researchers have utilized the efficient and convenient solution etching preparation,high flexibility,and easily functionalize MXene with other materials to pre-pare composites for gas sensing.This has opened a new chapter in high-performance gas sensing materials and provided a new approach for advanced sensor research.However,previous reviews on MXene-based composite materials in gas sensing only focused on the performance of gas sensing,without systematically explaining the gas sensing mechanisms generated by different gases,as well as summarizing and predicting the advantages and disadvantages of MXene-based composite materials.This article reviews the latest progress in the application of MXene-based composite materials in gas sensing.Firstly,a brief summary was given of the commonly used methods for preparing gas sens-ing device structures,followed by an introduction to the key attributes of MXene related to gas sensing performance.This article focuses on the performance of MXene-based composite materials used for gas sensing,such as MXene/graphene,MXene/Metal oxide,MXene/Transition metal sulfides(TMDs),MXene/Metal-organic framework(MOF),MXene/Polymer.It summarizes the advantages and disadvantages of MXene com-posite materials with different composites and discusses the possible gas sensing mechanisms of MXene-based composite materials for different gases.Finally,future directions and inroads of MXenes-based composites in gas sensing are presented and discussed. 展开更多
关键词 MXene Compound material gas sensor gas sensitive preparation gas sensitivity performance
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低维GaS高响应度纸基光电探测器
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作者 辛巍 仲玮恒 +2 位作者 王晓颖 闫楚欣 刘为振 《物理实验》 2024年第4期7-11,24,共6页
随着石墨烯的发现,二维材料因其与众不同的理化性质,而在科研领域的关注度与日俱增.以石墨烯为起点的二维材料(例如MoS_(2),WS_(2),GaS等)因在器件中具有较好的光电性质和较高的迁移率,而在生产和生活中具有良好的应用前景.本文简要探... 随着石墨烯的发现,二维材料因其与众不同的理化性质,而在科研领域的关注度与日俱增.以石墨烯为起点的二维材料(例如MoS_(2),WS_(2),GaS等)因在器件中具有较好的光电性质和较高的迁移率,而在生产和生活中具有良好的应用前景.本文简要探讨了光电导效应的原理,采用铅笔勾勒的方法绘制出了石墨电极,并采用体材料液相超声后分散液滴涂的方法,制备了宏观尺度的GaS纸基光电探测器,该探测器具有可见光范围的光电响应,且具有较好的机械重复性.本文介绍的纸基光电探测器的制备方法对于高校基础物理和半导体物理课程的教学具有实际意义,有利于学生更好地理解光电导效应的原理.此外,纸基光电探测器不仅降低了制备成本,而且还有助于提高高校学生的科研实践能力. 展开更多
关键词 gas 光电导效应 纸基 光电探测器
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Distribution patterns of tight sandstone gas and shale gas
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作者 DAI Jinxing DONG Dazhong +7 位作者 NI Yunyan GONG Deyu HUANG Shipeng HONG Feng ZHANG Yanling LIU Quanyou WU Xiaoqi FENG Ziqi 《Petroleum Exploration and Development》 SCIE 2024年第4期767-779,共13页
Based on an elaboration of the resource potential and annual production of tight sandstone gas and shale gas in the United States and China,this paper reviews the researches on the distribution of tight sandstone gas ... Based on an elaboration of the resource potential and annual production of tight sandstone gas and shale gas in the United States and China,this paper reviews the researches on the distribution of tight sandstone gas and shale gas reservoirs,and analyzes the distribution characteristics and genetic types of tight sandstone gas reservoirs.In the United States,the proportion of tight sandstone gas in the total gas production declined from 20%-35%in 2008 to about 8%in 2023,and the shale gas production was 8310×10^(8)m^(3)in 2023,about 80%of the total gas production,in contrast to the range of 5%-17%during 2000-2008.In China,the proportion of tight sandstone gas in the total gas production increased from 16%in 2010 to 28%or higher in 2023.China began to produce shale gas in 2012,with the production reaching 250×10^(8)m^(3)in 2023,about 11%of the total gas production of the country.The distribution of shale gas reservoirs is continuous.According to the fault presence,fault displacement and gas layer thickness,the continuous shale gas reservoirs can be divided into two types:continuity and intermittency.Most previous studies believed that both tight sandstone gas reservoirs and shale gas reservoirs are continuous,but this paper holds that the distribution of tight sandstone gas reservoirs is not continuous.According to the trap types,tight sandstone gas reservoirs can be divided into lithologic,anticlinal,and synclinal reservoirs.The tight sandstone gas is coal-derived in typical basins in China and Egypt,but oil-type gas in typical basins in the United States and Oman. 展开更多
关键词 shale gas tight sandstone gas reservoir characteristics continuous accumulation lithologic accumulation anticlinal accumulation synclinal accumulation coal-derived gas oil-type gas
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Experimental and numerical simulation study on the erosion behavior of the elbow of gathering pipeline in shale gas field
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作者 En-Bin Liu Shen Huang +3 位作者 Ding-Chao Tian Lai-Min Shi Shan-Bi Peng He Zheng 《Petroleum Science》 SCIE EI CAS CSCD 2024年第2期1257-1274,共18页
During the production period of shale gas, proppant particles and rock debris are produced together,which will seriously erode the elbows of gathering pipelines. In response to this problem, this paper takes the elbow... During the production period of shale gas, proppant particles and rock debris are produced together,which will seriously erode the elbows of gathering pipelines. In response to this problem, this paper takes the elbow of the gathering pipeline in the Changning Shale Gas Field as an example to test the erosion rate and material removal mechanism of the test piece at different angles of the elbow through experiments and compares the four erosion models with the experimental results. Through analysis, it is found that the best prediction model for quartz sand-carbon steel erosion is the Oka model. Based on the Oka model, FLUENT software was used to simulate and analyze the law of erosion of the elbow of the gas gathering pipeline under different gas flow velocities, gas gathering pressure, particle size, length of L1,and bending directions of the elbow. And a spiral pipeline structure is proposed to reduce the erosion rate of the elbow under the same working conditions. The results show that this structure can reduce erosion by 34%. 展开更多
关键词 Shale gas gas gathering pipeline ELBOW EROSION CFD
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Coal-rock gas:Concept,connotation and classification criteria
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作者 LI Guoxin ZHANG Shuichang +11 位作者 HE Haiqing HE Xinxing ZHAO Zhe NIU Xiaobing XIONG Xianyue ZHAO Qun GUO Xujie HOU Yuting ZHANG Lei LIANG Kun DUAN Xiaowen ZHAO Zhenyu 《Petroleum Exploration and Development》 SCIE 2024年第4期897-911,共15页
In recent years,great breakthroughs have been made in the exploration and development of natural gas in deep coal-rock reservoirs in Junggar,Ordos and other basins in China.In view of the inconsistency between the ind... In recent years,great breakthroughs have been made in the exploration and development of natural gas in deep coal-rock reservoirs in Junggar,Ordos and other basins in China.In view of the inconsistency between the industrial and academic circles on this new type of unconventional natural gas,this paper defines the concept of"coal-rock gas"on the basis of previous studies,and systematically analyzes its characteristics of occurrence state,transport and storage form,differential accumulation,and development law.Coal-rock gas,geologically unlike coalbed methane in the traditional sense,occurs in both free and adsorbed states,with free state in abundance.It is generated and stored in the same set of rocks through short distance migration,occasionally with the accumulation from other sources.Moreover,coal rock develops cleat fractures,and the free gas accumulates differentially.The coal-rock gas reservoirs deeper than 2000 m are high in pressure,temperature,gas content,gas saturation,and free-gas content.In terms of development,similar to shale gas and tight gas,coal-rock gas can be exploited by natural formation energy after the reservoirs connectivity is improved artificially,that is,the adsorbed gas is desorbed due to pressure drop after the high-potential free gas is recovered,so that the free gas and adsorbed gas are produced in succession for a long term without water drainage for pressure drop.According to buried depth,coal rank,pressure coefficient,reserves scale,reserves abundance and gas well production,the classification criteria and reserves/resources estimation method of coal-rock gas are presented.It is preliminarily estimated that the coal-rock gas in place deeper than 2000 m in China exceeds 30×10^(12)m^(3),indicating an important strategic resource for the country.The Ordos,Sichuan,Junggar and Bohai Bay basins are favorable areas for large-scale enrichment of coal-rock gas.The paper summarizes the technical and management challenges and points out the research directions,laying a foundation for the management,exploration,and development of coal-rock gas in China. 展开更多
关键词 coal-rock gas coalbed methane adsorbed gas free gas classification criteria reserves estimation method
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Development,challenges and strategies of natural gas industry under carbon neutral target in China
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作者 ZOU Caineng LIN Minjie +10 位作者 MA Feng LIU Hanlin YANG Zhi ZHANG Guosheng YANG Yichao GUAN Chunxiao LIANG Yingbo WANG Ying XIONG Bo YU Hao YU Ping 《Petroleum Exploration and Development》 SCIE 2024年第2期476-497,共22页
In the mid-21st century,natural gas will enter its golden age,and the era of natural gas is arriving.This paper reviews the development stages of global natural gas industry and the enlightenment of American shale gas... In the mid-21st century,natural gas will enter its golden age,and the era of natural gas is arriving.This paper reviews the development stages of global natural gas industry and the enlightenment of American shale gas revolution,summarizes the development history and achievements of the natural gas industry in China,analyzes the status and challenges of natural gas in the green and low-carbon energy transition,and puts forward the natural gas industry development strategies under carbon neutral target in China.The natural gas industry in China has experienced three periods:start,growth,and leap forward.At present,China has become the fourth largest natural gas producer and third largest natural gas consumer in the world,and has made great achievements in natural gas exploration and development theory and technology,providing important support for the growth of production and reserves.China has set its goal of carbon neutrality to promote green and sustainable development,which brings opportunities and challenges for natural gas industry.Natural gas has significant low-carbon advantages,and gas-electric peak shaving boosts new energy development;the difficulty and cost of development are more prominent.For the national energy security and harmonious development between economy and ecology under the carbon neutral goal,based on the principle of"comprehensive planning,technological innovation,multi-energy complementarity,diversified integration,flexibility and efficiency,optimization and upgrading",the construction of the production-supplystorage-marketing system has to be improved so as to boost the development of the natural gas industry.First,it is necessary to strengthen efforts in the exploration and development of natural gas,making projects and arrangement in key exploration and development areas,meanwhile,it is urgent to make breakthroughs in key science theories and technologies,so as to increase reserve and production.Second,it should promote green and innovative development of the natural gas by developing new techniques,expanding new fields and integrating with new energy.Third,there is a demand to realize transformation and upgrading of the supply and demand structure of natural gas by strengthening the layout of pipeline gas,liquefied natural gas and the construction of underground gas storage,establishing reserve system for improving abilities of emergency response and adjustment,raising the proportion of natural gas in the primary energy consumption and contributing to the transformation of energy consumption structure,realizing low-carbon resources utilization and clean energy consumption. 展开更多
关键词 carbon neutrality natural gas shale gas tight gas coalbed methane new energy energy transition
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GAS6-AS1调节miR-370-3p/SPATA2轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和EMT的影响
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作者 贾奕娟 王中显 +1 位作者 王冬花 龚世雄 《现代肿瘤医学》 CAS 2024年第3期424-431,共8页
目的:探讨长链非编码RNA GAS6反义RNA1(long non-coding RNA GAS6 antisense RNA1, lncRNA GAS6-AS1)调节miR-370-3p/精子发生相关蛋白2 (spermatogenesis-associated protein 2, SPATA2)轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和上皮间... 目的:探讨长链非编码RNA GAS6反义RNA1(long non-coding RNA GAS6 antisense RNA1, lncRNA GAS6-AS1)调节miR-370-3p/精子发生相关蛋白2 (spermatogenesis-associated protein 2, SPATA2)轴对卵巢癌细胞增殖、迁移、侵袭、凋亡和上皮间质转化(epithelial mesenchymal transformation, EMT)的影响。方法:qRT-PCR、Western blot分别检测癌旁组织、卵巢癌组织、人正常卵巢上皮细胞IOSE80及卵巢癌细胞系HO-8910、SKOV3、A2780中GAS6-AS1、miR-370-3p及SPATA2蛋白表达。将SKOV3细胞分为:对照组(NC组)、 si-NC组、si-GAS6-AS1组、mimic NC组、miR-370-3p mimic组、si-GAS6-AS1+inhibitor NC组、si-GAS6-AS1+miR-370-3p inhibitor组,qRT-PCR检测细胞中GAS6-AS1、miR-370-3p表达;CCK-8法检测细胞增殖;流式细胞术检测细胞凋亡;划痕愈合实验检测细胞迁移;Transwell实验检测细胞侵袭;Western blot检测SPATA2、细胞周期素D1(CyclinD1)、Bcl-2相关X蛋白(Bcl-2-associated X,Bax)、E-钙黏蛋白(E-cadherin)、波形蛋白(Vimentin)、神经钙黏蛋白(N-cadherin)表达;双荧光素酶报告基因实验检测GAS6-AS1与miR-370-3p、 miR-370-3p与SPATA2的关系。结果:在卵巢癌组织和细胞中GAS6-AS1、SPATA2蛋白高表达,miR-370-3p低表达,且在SKOV3细胞中GAS6-AS1、SPATA2蛋白表达量最高,miR-370-3p表达水平最低,因此,选择SKOV3细胞为后续研究对象。与NC组、si-NC组比较,si-GAS6-AS1组GAS6-AS1、OD450值(24 h、48 h、72 h)、划痕愈合率、侵袭细胞数、SPATA2、CyclinD1、Vimentin、N-cadherin蛋白表达降低,miR-370-3p表达、细胞凋亡率、Bax、E-cadherin蛋白表达升高(P<0.05);与NC组、mimic NC组比较,miR-370-3p mimic组OD450值(24 h、48 h、72 h)、划痕愈合率、侵袭细胞数、SPATA2、CyclinD1、Vimentin、N-cadherin蛋白表达降低,miR-370-3p表达、细胞凋亡率、Bax、E-cadherin蛋白表达升高(P<0.05);miR-370-3p inhibitor减弱了沉默GAS6-AS1对SKOV3细胞增殖、迁移、侵袭及EMT的抑制及对细胞凋亡的促进作用。GAS6-AS1与miR-370-3p、miR-370-3p与SPATA2存在靶向调控关系。结论:沉默GAS6-AS1通过上调miR-370-3p来抑制SPATA2表达,从而抑制SKOV3细胞增殖、迁移、侵袭及EMT,并促进细胞凋亡。 展开更多
关键词 长链非编码RNA gas6反义RNA1 miR-370-3p 精子发生相关蛋白2 卵巢癌 上皮间质转化
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LncRNA GAS5-AS1靶向miR-106a-5p调控结直肠癌细胞增殖、迁移和侵袭
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作者 余周 胡满溢 戴剑 《世界华人消化杂志》 CAS 2024年第7期525-533,共9页
背景长链非编码RNA(long non-coding RNA,LncRNA)生长停滞特异性转录本5反义RNA(growth arrest specific transcript 5 antisense RNA,GAS5-AS1)被发现在多种癌症中扮演肿瘤抑制因子的作用.但是其在结直肠癌(colorectal cancer,CRC)进... 背景长链非编码RNA(long non-coding RNA,LncRNA)生长停滞特异性转录本5反义RNA(growth arrest specific transcript 5 antisense RNA,GAS5-AS1)被发现在多种癌症中扮演肿瘤抑制因子的作用.但是其在结直肠癌(colorectal cancer,CRC)进展中的作用和机制尚不清楚.目的探讨LncRNA GAS5-AS1靶向miR-106a-5p在CRC进展中的作用.方法实时荧光定量聚合酶链反应分析LncRNA GAS5-AS1和miR-106a-5p在43对CRC组织和癌旁组织样本中的表达.分别转染pcDNA、pcDNA-LncRNA GAS5-AS1、anti-miR-NC、anti-miR-106a-5p、si-NC、si-LncRNA GAS5-AS1、pcDNA-LncRNA GAS5-AS1+miR-NC、pcDNA-LncRNA GAS5-AS1+miR-106a-5p mimics至HCT8细胞.细胞计数试剂盒-8法检测细胞活力;Transwell小室法检测迁移和侵袭细胞数.通过双荧光素酶报告实验确定LncRNA GAS5-AS1和miR-106a-5p的靶向关系.结果与癌旁组织比较,CRC组织中LncRNA GAS5-AS1表达降低(P<0.05),miR-106a-5p表达升高(P<0.05).与转染pcDNA比较,转染pcDNA-LncRNA GAS5-AS1后HCT8细胞活力、迁移、侵袭、miR-106a-5p表达显著降低(P<0.05).与转染anti-miR-NC比较,转染anti-miR-106a-5p后HCT8细胞活力、迁移和侵袭细胞数显著降低(P<0.05).与转染si-NC比较,转染si-LncRNA GAS5-AS1后miR-106a-5p表达水平显著升高(P<0.05).与转染miR-NC比较,转染miR-106a-5p能显著降低LncRNA GAS5-AS1-WT载体的荧光素酶活性,表明miR-106a-5p是LncRNA GAS5-AS1的直接靶点.与转染pcDNA-LncRNA GAS5-AS1+miR-NC比较,转染pcDNA-LncRNA GAS5-AS1+miR-106a-5p mimics后HCT8细胞活力、迁移和侵袭细胞数显著升高(P<0.05).结论LncRNA GAS5-AS1通过靶向miR-106a-5p来抑制CRC细胞增殖、迁移和侵袭. 展开更多
关键词 结直肠癌 LncRNA gas5-AS1 miR-106a-5p 细胞增殖 迁移 侵袭
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