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Deep bedrock geothermal resources in the Maichen Sag,Beibuwan Basin and their potential for exploitation and utilization
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作者 Yan Zeng Ying Zhang 《Energy Geoscience》 2023年第4期188-197,共10页
The Maichen Sag in the south-central part of the Beibuwan Basin is abundant in geothermal resources that have not been widely exploited and utilized due to inadequate research on it.This study evaluated the geothermal... The Maichen Sag in the south-central part of the Beibuwan Basin is abundant in geothermal resources that have not been widely exploited and utilized due to inadequate research on it.This study evaluated the geothermal resources in the Maichen Sag based on the regional geological setting and geothermal conditions.Grid units for assessment and a geological model for areas with geothermal resources were established using spatial analysis techniques.The spatial distribution models of the physical and thermophysical properties of the geothermal reservoirs were also built using the Kriging interpolation method.Based on the terrestrial heat flow distribution in the target areas,the spatial distribution of the geo-temperature field through the inversion under the constraints of the temperature data from boreholes were predicted.Factors such as deep geo-temperature,thermophysical properties of rocks,and terrestrial heat flow values,were integrated into this quantitative evaluation of geothermal resources through the geological modeling-based volume method and the geothermal reservoir engineering-based numerical simulation method.The results show that the Maichen Sag has favorable heat source conditions with intersected,deep-rooted faults and widely developed Upper Paleozoic fissured granite geothermal reservoirs.The northern outer slope zone at a burial depth of 3‒5 km on the tectonic plane of the basement in the sag is suggested to be a potential target area,where,as calculated using the volume method,is likely to be the home to the total geothermal resources of 80.4×10^(9)GJ(i.e.,2.75×10^(9)tonnes of coal equivalent(tce))in the bedrock geothermal reservoirs at a burial depth of 3‒6 km.The geotemperature of 172‒201℃at a formation depth of 5 km in the sag also indicates that the deep geothermal resources are of high value for exploitation. 展开更多
关键词 Maichen sag Geothermal resource Resource evaluation Parameter estimation for geothermal resource exploitation Numerical simulation
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Exploitation and Utilization of Insect Protein Feed Resources 被引量:5
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作者 刘佳妮 徐松萍 +3 位作者 刘华青 张俨 李国涛 仇燕红 《Agricultural Science & Technology》 CAS 2017年第3期469-472,共4页
The insect is the animal protein feed resource potential, the rapid repro- duction, large quantity, high protein content, and most species of insects can be used as livestock feed utilization, development of insect as... The insect is the animal protein feed resource potential, the rapid repro- duction, large quantity, high protein content, and most species of insects can be used as livestock feed utilization, development of insect as feed resources, to pro- mote the development of China's animal husbandry and feed industry, has important significance. 展开更多
关键词 INSECT Protein feed exploitation and utilization
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Reflection on the Exploitation of Rural Tourism Resources in Zhenjiang City 被引量:1
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作者 张利华 《Journal of Landscape Research》 2010年第4期76-80,共5页
Rural tourism, i.e., agrotourism, is the newly-exploited tourism product[1] with agricultural production, rustic view, rural life and rural custom as the main carrier and with agriculture and countryside as the touris... Rural tourism, i.e., agrotourism, is the newly-exploited tourism product[1] with agricultural production, rustic view, rural life and rural custom as the main carrier and with agriculture and countryside as the tourism resources. Zhenjiang City is in possession of adequate source markets, abundant rural tourism resources, good tourist ecological environment and profound culture. The pleasant ecological environment and charming rural scenery provide the development of rural tourism in Zhenjiang with exceptional advantages. The exploitation of rural tourism not only promotes the exploitation and development of agricultural tourism in Zhenjiang, but also improves the structure of tourism product, simulating the healthy development of rural economy. Through the analysis of the exploitation advantage of the rural tourism resources in Zhenjiang, the author analyzed the exploitation situation and existing problems of the rural tourism resources in Zhenjiang. The author considered that the rural tourism development in Zhenjiang was lack of unified planning; the cultural content of tourism product was low; the development depth was not enough; the construction of infrastructure was lagging behind; and meanwhile, it was lacking of funding, tourism program and advertising promotion. In the light of the above deficiencies, a series of countermeasures of rural tourism exploitation was put forward, that is, to complete the exploitation planning of the rural tourism resources, promoting the cultural taste of the rural tourism product; to enhance the publicity of the rural tourism, highlighting the brand feature of local tourism and creating high-quality product; to conduct standard management, strengthening the training of tourism management personnel. 展开更多
关键词 Zhenjiang RURAL TOURISM RESOURCES exploitation
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The Orientation and Development of Zhenjiang Pearl S.Buck Tourism Products Exploitation 被引量:1
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作者 曹步霄 《Journal of Landscape Research》 2009年第2期61-64,共4页
This study aimed to make an orientation for the development of Zhenjiang Pearl S.Buck tourism products.According to the spatial structure styles of tourism products,this paper discussed the exploitation of Zhenjiang P... This study aimed to make an orientation for the development of Zhenjiang Pearl S.Buck tourism products.According to the spatial structure styles of tourism products,this paper discussed the exploitation of Zhenjiang Pearl S.Buck tourism products from the perspective of spot products,linear products and network products.It expanded the Pearl S.Buck research to tourism science field and put forward some ideas of promoting the comprehensive benefits of Pearl S.Buck tourism resource as well as the exploitation of similar tourism products. 展开更多
关键词 PEARL S.Buck TOURISM PRODUCT PRODUCT exploitation PRODUCT ORIENTATION
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Gradient Differentiation and Exploitation Mode of Tourist Resources in Hailuogou Scenic Area,China
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作者 马晓路 许霞 《Journal of Landscape Research》 2011年第3期68-71,共4页
Natural environment of Hailuogou Scenic Area(Conch Gully)was introduced,and it was pointed out that tourist resources in the study area showed gradient differentiation along the vertical height.In view of such gradien... Natural environment of Hailuogou Scenic Area(Conch Gully)was introduced,and it was pointed out that tourist resources in the study area showed gradient differentiation along the vertical height.In view of such gradient differentiation,resource contents and characteristics of its cultural heritages zone,geothermal resources zone,forest vegetation zone,and glacial resources zone were respectively analyzed.Based on the gradient differentiation of tourist resources in Hailuogou Scenic Area,suggestions were given for its further tourism development,and it was stressed that brand effects of the attractions should be enhanced,infrastructure construction and maintenance of newly-explored scenic spots should be improved,and more efforts should be devoted to explore disastrous landform resources.This research is of practical significance for studying spatial differentiation and evolution mechanism of tourist resources in mountainous areas in western China,and also provides scientific support for the exploration of tourist resources in mountainous areas. 展开更多
关键词 TOURISM RESOURCES GRADIENT DIFFERENTIATION exploitation MODE Hailuogou
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将EXPLOITATION译成“剥削”质疑
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作者 杨彬 《学术交流》 CSSCI 北大核心 2008年第1期24-27,共4页
英文EXPLOITATION与汉语的"剥削"不能构成互相对译的词汇。EXPLOITATION在英语中的原意是开发、开拓、利用;"剥削"在汉语中解释为"搜刮民财,荼毒天下"。这两个词原始语义不同,词汇的褒贬含义不同,所代表... 英文EXPLOITATION与汉语的"剥削"不能构成互相对译的词汇。EXPLOITATION在英语中的原意是开发、开拓、利用;"剥削"在汉语中解释为"搜刮民财,荼毒天下"。这两个词原始语义不同,词汇的褒贬含义不同,所代表的善恶是非观念界限不同,作为一种社会现象和行为,其合法性和社会后果不同,在未来社会发展进程中的前景和结局不同。当今中国社会所存在的"剥削"是封建社会腐朽的官民关系的残余。EXPLOITATION如果以人为对象客体,则应该译成汉语的"人力资源开发利用"。 展开更多
关键词 exploitation 剥削 人力资源
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EXPLOITATION可以译成“剥削”——与杨彬先生商榷
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作者 郑国栋 《学术交流》 CSSCI 北大核心 2009年第12期194-197,共4页
《将EXPLOITATION译成"剥削"质疑》一文认为把EXPLOITATION一词译成"剥削"是扭曲了词义,应该译成"人力资源开发、利用"。这是不对的。其实,在英语中EXPLOITA-TION有"剥削"之义,可以译成"... 《将EXPLOITATION译成"剥削"质疑》一文认为把EXPLOITATION一词译成"剥削"是扭曲了词义,应该译成"人力资源开发、利用"。这是不对的。其实,在英语中EXPLOITA-TION有"剥削"之义,可以译成"剥削"。汉语中的"剥削"概念受到了马克思主义政治经济学的影响,但与EXPLOITATION的翻译无关。 展开更多
关键词 剥削 exploitation含义 翻译
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Exploitation and Sustainable Development of Hot Springs in Xinjiang Province of China——A Case Study of Shawan Hot Spring Tourist Area
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作者 张滢 《Journal of Landscape Research》 2011年第10期36-39,43,共5页
The paper had introduced geographic causes and types of hot springs, illustrated its disease-treating function and displayed its great vitality and widespread development prospect as tourist resources. By taking Shawa... The paper had introduced geographic causes and types of hot springs, illustrated its disease-treating function and displayed its great vitality and widespread development prospect as tourist resources. By taking Shawan Hot Spring in Xinjiang for example, the paper had analyzed its natural condition, hot springs and tourist economic development. And then, quantitative and qualitative analysis had been conducted on the quality of water environment resources in the research area. It had analyzed reasons for degeneration of water environment and studied exploitation and sustainable development of hot springs. It was considered that environment especially water environment quality had decreased since hot spring tourism development. In order to achieve sustainable development of hot springs and promotion of local tourism, it must be guided by environment treatment, and some strategies for sustainable development of hot springs had been proposed. 展开更多
关键词 HOT SPRINGS exploitation SUSTAINABLE development
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Exploitation and Abuse of Children in "Entrepreneurial" Purposes
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作者 Goran Kutnjak Matija Radovic Diana Blaskovic 《Chinese Business Review》 2012年第10期891-899,共9页
The society of today often likes to brand itself as modem, advanced, civilized, or a society of positive changes. However, it is a fact that the world is confronted with huge contradictions that oppose such qualificat... The society of today often likes to brand itself as modem, advanced, civilized, or a society of positive changes. However, it is a fact that the world is confronted with huge contradictions that oppose such qualifications. Obviously, one of the most striking and almost unbelievable realities tells us about inhumane and uncivilized actions of child exploitation in "entrepreneurial" purposes in the widest range of exploitation and abuse. Current period of economic crisis tells us even more about the rising crisis of moral, which is, in statistical terms, confirmed by a rising number of exploited children in a global framework, and even in some national frameworks as well. With that, some positive results about the diminishing number of exploited children are devaluated. The question is what are the "limits" of such behavior of groups, organizations, and individuals whose behavior is, obviously, tolerated in the frameworks of certain national economies. Does this behavior have clarity as a part of modem society? Or, even more severe, for how long can we as a society close our eyes in front of such facts? Do we even have the right? In this paper, the authors strive towards focusing and objectifying the global problem of exploitation and abuse of children in "entrepreneurial" purposes, primarily with the purpose of updating all parts of the society of this paradox and the need of raising the awareness and teaching all relevant factors--from institutions to individuals, with the purpose of resolving and more neutralize the equivalents of this uncivilized and non-entrepreneurial "phenomenon", as well as approaching the same in the framework of different actions with broadest measures possible and with all disposable assets. 展开更多
关键词 ENTREPRENEURSHIP CHILDREN exploitation ABUSE forms of exploitation
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Damage, failure and stability control of evolutionary process caused by re-exploitation of the residual resources
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作者 Xiao-Jing FENG Dong DUAN +2 位作者 Qu-Zhen TIAN Kai WANG Li-Bin LIU 《Journal of Coal Science & Engineering(China)》 2013年第4期462-467,共6页
On the basis of considering the heterogeneity and using the finite element numerical simulation, this thesis investi- gates the damage of the roof and coal as well as the failure of evolutionary process during the re-... On the basis of considering the heterogeneity and using the finite element numerical simulation, this thesis investi- gates the damage of the roof and coal as well as the failure of evolutionary process during the re-exploitation of the residual coal. According to the analysis of the damage field, stress field and the failure process, it explores the damage evolution, stress distribution laws and the damage models. Besides, this thesis puts forward the idea of penetrating and establishing drilling steels aimed at solving the problem of wall carving and roof fall, meanwhile this suggestion accomplishes the successful appli- cation effect in the testing ground. This thesis demonstrates that the re-exploitation of the residual coal can be carried out and the safe production can be ensured by adopting some measures. What's more, the research result provides the theoretical and practical experience for the re-exploitation of the residual coal in the similar conditions. 展开更多
关键词 re-exploitation of residual resources fully mechanized exploitation of the long wall damage evolution control ofstability numerical simulation
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Comprehensive Control Measures and Effect Evaluation of Groundwater Over-exploitation Areas in High-tech Zone,Jining in 2020
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作者 Shengqing LI Fei XIE 《Meteorological and Environmental Research》 CAS 2022年第3期82-85,共4页
Groundwater over-exploitation is a major problem in groundwater development, utilization and protection. At present, the area of shallow groundwater over-exploitation in the High-tech Zone is 76 km^(2). In this study,... Groundwater over-exploitation is a major problem in groundwater development, utilization and protection. At present, the area of shallow groundwater over-exploitation in the High-tech Zone is 76 km^(2). In this study, the system and mechanism construction, engineering measure construction, and control effect of national comprehensive control project of groundwater over-exploitation areas in the High-tech Zone in 2020 were evaluated, and the comprehensive control of groundwater over-exploitation in the High-tech Zone in the year was summarized to provide effective basis for the continuous implementation of comprehensive control of groundwater over-exploitation. At the same time, the water-saving and exploitation reduction effect and generalizability of different measures were studied to provide useful reference for other over-exploitation areas. 展开更多
关键词 GROUNDWATER Over-exploitation area exploitation reduction effect High-tech Zone Jining
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Canadian West Exploitation in the Context of American Threat of Annexation
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作者 李圣恩 《海外英语》 2011年第10X期386-387,共2页
America had been attempting to annex Canadian West and posed a threat to the security of the fledgling country. Therefore the antipathy towards America as well as independent-nation complex of Canadians drove Canadian... America had been attempting to annex Canadian West and posed a threat to the security of the fledgling country. Therefore the antipathy towards America as well as independent-nation complex of Canadians drove Canadian government to incorporate the west exploitation into the national strategy of creating an independent country. Canadian west exploitation thus took on some distinctiveness. 展开更多
关键词 ANNEXATION WEST exploitation strategy
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SUSTAINABLE EXPLOITATION AND UTILIZATION OF WATER RESOURCES IN THE INLAND RIVERBASIN OF ARID NORTHWEST CHINA 被引量:12
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作者 马金珠 《Chinese Geographical Science》 SCIE CSCD 1997年第4期347-351,共5页
Calculated in terms of surface runoff plus irrepeated groundwater, there is about 8. 67 ×1010m3 of total available water resources in the inland river basins of arid Northwest China. Water resources is the decisi... Calculated in terms of surface runoff plus irrepeated groundwater, there is about 8. 67 ×1010m3 of total available water resources in the inland river basins of arid Northwest China. Water resources is the decisive factor for survival of oases and human being. But there have arisen several aspects of Serious eco-environment problems resulted from irrational exploitation and utilization. From now on, the development and utilization of water not only requires to promote regional economy, but also needs to protect and improve the environment based on their potential. Sustainable utilization needs to broaden new sources and saving water at first. Then three measures are recommended. 展开更多
关键词 water RESOURCES sustainable exploitation and utilization INLAND river BASIN
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Numerical Modelling of Dissolving and Driving Exploitation of Potash Salt in the Qarhan Playa——A Coupled Model of Reactive Solute Transport and Chemical Equilibrium in a Multi-component Underground Brine System 被引量:10
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作者 LI Wenpeng LIU Zhenying 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2008年第5期1070-1082,共13页
Firstly, the macroscopic chemical equilibrium state of a series of chemical reactions between intercrystal brine and its media salt layer (salt deposit) in Qarhan Salt Lake was studied by using the Pitzer theory. Th... Firstly, the macroscopic chemical equilibrium state of a series of chemical reactions between intercrystal brine and its media salt layer (salt deposit) in Qarhan Salt Lake was studied by using the Pitzer theory. The concept of macroscopic solubility product and its relation with accumulated ore dissolving ratio were presented, which are used in the numerical model of dissolving and driving exploitation of potassium salt in Qarhan Salt Lake. And secondly, with a model forming idea of transport model for reacting solutes in the multi-component fresh groundwater system in porous media being a reference, a two-dimensional transport model coupled with a series of chemical reactions in a multi-component brine porous system (salt deposits) was developed by using the Pitzer theory. Meanwhile, the model was applied to model potassium/magnesium transport in Qarhan Salt Lake in order to study the transfer law of solid and liquid phases in the dissolving and driving process and to design the optimal injection/abstraction strategy for dissolving and capturing maximum Potassium/ Magnesium in the mining of salt deposits in Qarhan Salt Lake. 展开更多
关键词 salt lake macroscopic solubility product transport model of reacting solutes dissolving and driving exploitation
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Distribution characteristics of seamount cobalt-rich ferromanganese crusts and the determination of the size of areas for exploration and exploitation 被引量:9
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作者 HE Gaowen MA Weilin +5 位作者 SONG Chengbing YANG Shengxiong ZHU Benduo YAO Huiqiang JIANG Xunxiong CHENG Yongshou 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2011年第3期63-75,共13页
In 2001, the International Seabed Authority (ISBA) initiated the consideration relating to the Regulations for Prospecting and Exploration for Hydrothermal Polymetallic Sulphides and Cobalt-rich Ferromanganese Crust... In 2001, the International Seabed Authority (ISBA) initiated the consideration relating to the Regulations for Prospecting and Exploration for Hydrothermal Polymetallic Sulphides and Cobalt-rich Ferromanganese Crusts in the Area at its 7th session. Since then, the consideration of the Regulations has been mainly focused on the size of areas to be allocated for exploration and exploitation of the crusts. This paper, based on the investigation data and the analysis of the distribution characteristics of the crusts, suggests a model for determining the size of areas for exploration and exploitation of the crusts, taking into account various factors such as production scale, crust thickness and grade, mineable area proportion, recovery efficiency, exploration venture, and so on. Through the modeling, the paper suggests that the exploration area (the area covered by each application for approval of a plan of work for exploration of cobalt-rich crusts) shall be 4 856 km2 and the exploitation area (the mine site area) shall be 1 214 km2, for 20 years of 1 million wet tonnes annual production. 展开更多
关键词 cobalt-rich ferromanganese crusts exploration and exploitation area SEAMOUNTS regulation on exploration
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Comprehensive study on ecological restoration and land exploitation of mining subsidence in suburbs of Chinese mining cities 被引量:7
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作者 Jinhua Zhou Lejie Wang 《International Journal of Coal Science & Technology》 EI CAS 2014年第2期248-252,共5页
China has nearly a hundred mining cities derived from mining development.While mining development has brought about immense achievements in a city’s economic construction,it has also resulted in different levels of d... China has nearly a hundred mining cities derived from mining development.While mining development has brought about immense achievements in a city’s economic construction,it has also resulted in different levels of damage to the eco-environment of the mining city,leaving behind a lot of subsided wasteland and heavily confining the sustainable development and transformation there.How to restore and exploit the land and eco-environment disrupted by mining development in an effective way,therefore,has become a pressing challenge that Chinese mining cities are facing.In this paper,the planning and construction of Nanhu Eco-city in the suburb of Tangshan City is analyzed as an example.After characterizing the coal-mining subsided lands in Kailuan Tangshan Mine originated in different periods and under different geological mining conditions and evaluating their safety level,the authors try to demonstrate how eco-restoration and comprehensive land exploitation should be implemented by making the best use of available local resources to achieve "economy-society-environment" sustainability and coexistence in a mining city. 展开更多
关键词 Ecological restoration Land exploitation Mining subsidence Mining city Tangshan
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Geothermal energy exploitation from depleted high-temperature gas reservoirs by recycling CO_(2): The superiority and existing problems 被引量:8
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作者 Guodong Cui Shaoran Ren +1 位作者 Bin Dou Fulong Ning 《Geoscience Frontiers》 SCIE CAS CSCD 2021年第6期428-443,共16页
CO_(2) can be used as an alternative injectant to exploit geothermal energy from depleted high-temperature gas reservoirs due to its high mobility and unique thermal properties.However,there has been a lack of systema... CO_(2) can be used as an alternative injectant to exploit geothermal energy from depleted high-temperature gas reservoirs due to its high mobility and unique thermal properties.However,there has been a lack of systematic analysis on the heat mining mechanism and performance of CO_(2),as well as the problems that may occur during geothermal energy exploitation at specific gas reservoir conditions.In this paper,a base numerical simulation model of a typical depleted high-temperature gas reservoir was established to simulate the geothermal energy exploitation processes via recycling CO_(2) and water,with a view to investigate whether and/or at which conditions CO_(2) is more suitable than water for geothermal energy exploitation.The problems that may occur during the CO_(2)-based geothermal energy exploitation were also analyzed along with proposed feasible solutions.The results indicate that,for a depleted low-permeability gas reservoir with dimensions of 1000 m×500 m×50 m and temperature of 150℃ using a single injection-production well group for 40 years of operation,the heat mining rate of CO_(2) can be up to 3.8 MW at a circulation flow rate of 18 kg s^(-1)due to its high mobility along with the flow path in the gas reservoir,while the heat mining rate of water is only about 2 MW due to limitations on the injectivity and mobility.The reservoir physical property and injection-production scheme have some effects on the heat mining rate,but CO_(2)always has better performance than water at most reservoir and operation conditions,even under a high water saturation.The main problems for CO_(2) circulation are wellbore corrosion and salt precipitation that can occur when the reservoir has high water saturation and high salinity,in which serious salt precipitation can reduce formation permeability and result in a decline of CO_(2) heat mining rate (e.g.up to 24%reduction).It is proposed to apply a low-salinity water slug before CO_(2)injection to reduce the damage caused by salt precipitation.For high-permeability gas reservoirs with high water saturation and high salinity,the superiority of CO_(2) as a heat transmission fluid becomes obscure and water injection is recommended. 展开更多
关键词 Depleted high-temperature gas reservoir Heat transmission fluid Geothermal energy exploitation CO_(2) Salt precipitation
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Exploitation technology of pressure relief coalbed methane in vertical surface wells in the Huainan coal mining area 被引量:13
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作者 HAN Jia-zhang SANG Shu-xun +1 位作者 CHENG Zhi-zhong HUANG Hua-zhou 《Mining Science and Technology》 EI CAS 2009年第1期25-30,共6页
Exploitation technology of pressure relief coalbed methane in vertical surface wells is a new method for exploration of gas and coalbed methane exploitation in mining areas with high concentrations of gas, where tecto... Exploitation technology of pressure relief coalbed methane in vertical surface wells is a new method for exploration of gas and coalbed methane exploitation in mining areas with high concentrations of gas, where tectonic coal developed. Studies on vertical surface well technology in the Huainan Coal Mining area play a role in demonstration in the use of clean, new energy resources, preventing and reducing coal mine gas accidents and protecting the environment. Based on the practice of gas drainage engineering of pressure relief coalbed methane in vertical surface wells and combined with relative geological and exploration en- gineering theories, the design principles of design and structure of wells of pressure relief coalbed methane in vertical surface wells are studied. The effects of extraction and their causes are discussed and the impact of geological conditions on gas production of the vertical surface wells are analyzed. The results indicate that in mining areas with high concentrations of gas, where tectonic coal developed, a success rate of pressure relief coalbed methane in surface vertical well is high and single well production usually great. But deformation due to coal exploitation could damage boreholes and cause breaks in the connection between aquifers and bore-holes, which could induce a decrease, even a complete halt in gas production of a single well. The design of well site location and wellbore configuration are the key for technology. The development of the geological conditions for coalbed methane have a significant effect on gas production of coalbed methane wells. 展开更多
关键词 pressure relief coalbed methane exploitation vertical surface well Huainan coal mining area
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Drilling and completion technologies of coalbed methane exploitation: an overview 被引量:4
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作者 Tianshou Ma Jinhua Liu +1 位作者 Jianhong Fu Bisheng Wu 《International Journal of Coal Science & Technology》 EI CAS CSCD 2022年第5期1-31,共31页
Coalbed methane(CBM)drilling and completion technologies(DCTs)are signifcant basis for achieving efcient CBM exploration and exploitation.Characteristics of CBM reservoirs vary in diferent regions around the world,the... Coalbed methane(CBM)drilling and completion technologies(DCTs)are signifcant basis for achieving efcient CBM exploration and exploitation.Characteristics of CBM reservoirs vary in diferent regions around the world,thereby,it is crucial to develop,select and apply the optimum DCTs for each diferent CBM reservoir.This paper frstly reviews the development history of CBM DCTs throughout worldwide and clarifes its overall development tendency.Secondly,diferent well types and its characteristics of CBM exploitation are summarized,and main application scopes of these well types are also discussed.Then,the key technologies of CBM drilling(directional drilling tools,measurement while drilling,geo-steering drilling,magnetic guidance drilling,underbalanced drilling and drilling fuids),and the key technologies of CBM completion(open-hole,cavity and under-ream completion,cased-hole completion,screen pipe completion and horizontal well completion)are summarized and analyzed,it is found that safe,economic and efcient development of CBM is inseparable from the support of advanced technologies.Finally,based on the current status of CBM development,the achievements,existing challenges and future prospects are summarized and discussed from the perspective of CBM DCTs. 展开更多
关键词 Coalbed methane CBM exploitation DRILLING COMPLETION Horizontal well L/U/V-shaped well Multilateral well
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Prediction of land subsidence caused by groundwater exploitation in Hanoi, Vietnam, using multifactorial correlation analysis 被引量:7
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作者 Thinh Hong Phi Ludmila Aleksandrovna Strokova 《Research in Cold and Arid Regions》 CSCD 2013年第5期644-653,共10页
Multifactorial correlation analysis is a new method used to predict the land subsidence caused by groundwater exploitation This article introduces and applies the method to establish the function of the surface settle... Multifactorial correlation analysis is a new method used to predict the land subsidence caused by groundwater exploitation This article introduces and applies the method to establish the function of the surface settlement rate (Vs) and the function of the time-dependent surface settlement (St) caused by groundwater exploitation, based on data acquired at three land subsidence monitoring stations in the Hanoi area of Vietnam. Comparison with actual monitoring data indicates that the prediction results are relatively close to the monitoring data. From this, we conclude that multifactorial correlation analysis is a reliable method and can be used to predict future land subsidence caused by groundwater exploitation in Hanoi. 展开更多
关键词 land subsidence groundwater exploitation multifactorial correlation analysis surface settlement rate time-dependent settlement
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