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Exploration of CBM Industrialized Development in China
Guo Benguang
(China United Coalbed Methane Corp. Ltd. Beijing, 100011)Abstract: With a good state of development, CBM exploration and development in China has made a great progress from the initial resources evaluation to national planning and commercialized production. China United Coalbed Methane Corp. Ltd. (CUCBM) is the only professional coalbed methane company with exclusive right for international cooperation in the country. The paper introduces some of the work CUCBM has carried out in terms of establishing demonstration projects, building up technical systems and exploring the development and utilization of CBM.
Key words: Coal bed methane£»demonstration project£»technical system£»industrialization
Economic Assessment of Enhanced Coalbed Methane Recovery in China
S. Shimada1£¬Y. Funahashi1£¬H. Li1£¬K. YAMAMOTO2 and O. KITAMURA3
£¨1£®Institute of Environmental Studies, Graduate School of Frontier Sciences, The University of Tokyo£¬Tokyo Japan£»2£®Environment, Natural Resources and Energy, Mizuho Information & Research Institute£¬Tokyo Japan£»3£®1209, Science Solutions, Mizuho Information & Research Institute£¬Tokyo Japan£»£©Abstract:£ºThe paper confirms the effectiveness of the ECOMERS-UT simulation system in terms of assessing enhanced coalbed methane recovery and expounds influences of seam features and compositions of injected gases to methane output. Forecast of production and assessment of economic benefits for enhanced coalbed methane recovery projects in China are also made in the meanwhile.
Key words: Coalbed methane£»enhanced recovery£»forecast of production£»economic analysis
Practices of Comprehensive Gas Extraction Technologies in Tunlan Coal Mine
of Gujiao Mining Area
Wang Shaojin
(Xishan Coal and Power Co.£¬Ltd, Shanxi Coking Coal Group£¬Shanxi 030053)Abstract: Continuous improvements in gas extraction systems and technologies from roofs of adjacent seams made by Tunlan Coal Mine of Gujiao Mining Community has resulted in the increase of gas extraction efficiency, significant reduction of gas content in mining and tunneling faces and strong promotion of work safety in the mine. Tunlan Coal Mine has not only brought striking effects but also collected valuable experiences in terms of tests of in-seam gas extraction technologies and application of comprehensive gas extraction technologies.
Key words: Coal mine gas£»seam permeability£»gas extraction technology
Analysis on CBM Competitiveness in Primary Energy Consumption Market
Zhang Suian
£¨China University of Petroleum£¬Beijing 102249£©Abstract: Based on investigations and studies on CBM utilization market for years, in-depth analysis has been made on competitiveness of CBM with primary energy such as coal, oil and natural gas. The paper has focused on analysis of advantages and disadvantages of CBM when competing with regular natural gas. Advantages mainly include cheap resources, geology, cost-effective collection, transportation and treatment, long production period and social benefits and disadvantages mainly include low output of unit well and long recovery period of investment. Results of analysis have proved that CBM has competitiveness in the primary energy consuming market to some extent.
Key words: Coalbed Methane£»Consuming market£»Competitiveness
Status Quo and Prospects of CMM Development and Utilization in Jixi Coal Mining Area
Pei Mingshun Tang Aidong
£¨Jixi Mining Group Corporation, Jixi, Heilongjiang 158100£©Abstract: Jixi Mining Community has rather rich coal and CMM reserves. With continuous improvements in mine gas extracting standards and quantity, development and utilization of coal mine methane have been progressing gradually in the community. The paper has focused on status quo and vast prospects of CMM development and utilization based on geological conditions there.
Key words: Coal mine methane£»development and utilization£»prospects of development
Relationship of Coalbed Methane adsorption Potential and Coal Rank
Su Xianbo£¬Liu Guowei£¬Guo Shengqiang and Lin Xiaoying
£¨Henan University of Science and Technology£¬Henan 454000£©Abstract£º Based on the adsorption potential theory and the isotherm data measured and collected at 30¡æ of the equilibrium moisture, the adsorption potential of coals with different ranks is calculated and equivalent methane (5cm3/g) is adsorbed on these coals. The result is found out that the evolution of adsorption capacity and potential are well-regulated with coal rank. The evolution is absolutely corresponding to the coalification jump. Therefore, coalbed methane adsorption has close relationships with coal molecular structure, crystal structure and porosity.
Keywords£ºCoalbed methane£»adsorption potential£»coal rank£»coalification jump
Study on CBM Enrichment Mode of Low Rank Coal in China
Fu Xiaokang1£¬Huo Yongzhong2 and Ye Jianping2
(1. China University of Geosciences (Beijing)£¬Beijing 100083£»
2. China United Coalbed Methane Co. Ltd.£¬Beijing 100011)Abstract£ºChina has rich CBM resources in low rank coals. It¡¯s of great significance in the development of such resources. Key factors of development are to find out the CBM enriched zones. Analysis on two low rank coal basins respectively from the USA and China has helped to summarize key factors of affecting CBM enriched zones and five modes of CBM enrichment.
Keywords£ºCoalbed Methane£»low rank coal£»enrichment model
Reservoir Simulation for CBM/CMM Production Forecasting and Field Optimisation
Zhejun Pan and Luke Connell
(CSIRO Petroleum£¬Australia)Abstract£ºSIMED II is a unique, highly sophisticated coalbed methane reservoir simulation model, which is capable of unsteady-state, multi-component gases, three-dimensional reservoir simulation. This paper describes the processes represented in SIMED II and how it can be applied to simulate gas production and mine drainage from coal gas reservoirs.
Keywords£ºCBM£»production forecasting£»field optimization
Coalbed Methane Liquefied Technology
Li Hongyan and Jia Linxiang
(Harbin Institute of Technology, Harbin 150080)
Abstract£º The paper has discussed the problems existed in utilization of CBM in China and focused on advantages of CBM liquefaction, status quo of CBM liquefied technology and relevant research work carried out by organizations in the country.
Keywords£ºCoalbed methane£»exploitation and utilization£»liquefied technology
Application of Surface Micro-seismic Method in Monitoring CBM Well Artifical Factures
Bai Jianping
£¨Jincheng Anthracite Mining Group, Jincheng, Shanxi 048006£©Abstract: Artifical fractures for CBM wells play important roles in CBM development. The paper has not only set forth the monitoring principle of artifical fractures for CBM wells, but also established a way of improving fractured results through field tests and analysis, thus providing the scientific basis for arrangement of surface CBM well network.
Key words: Surface micro-seism£»coalbed methane£»facture monitoring
Study and Application of CMM Extraction Technology
Tang Aidong
£¨Jixi Minign Group Corporation, Jixi, Heilongjiang 158100£©Abstract: The paper has introduced gas extracting technologies and methods Jixi coal mining area adopted such as flat extraction in high site, oblique borehole extraction from head-on elevation angle, extraction from the roof gas heading and extraction during tunneling. Practices have proved that effective gas extraction can improve ventilation management, gas control and reliability of work safety in the mine.
Key words: Gas extraction£»comprehensive control£»Jixi coal mining area
Discussion on Enhanced CBM Recovery
Cheng Linfeng
£¨Liaohe Oil Exploration Bureau, China Petroleum Corporation, Liaoning 124010£©Abstract: CBM reservoirs are featured with complicated structures, low gas content, low permeability and low pressure in original reservoirs. Currently, enhanced coalbed methane(ECBM) is not only one of the major ways to improve recovery, but also a research focus of technology to increase production carried out by CBM development organizations at home and abroad. Based on relevant experiences collected from the oil sector, the paper has introduced the ECBM comprehensively in four aspects of mechanism of ECBM, types of enhanced well network, flowsheet of surface equipments and dynamic analysis model of gas enhancement and extraction.
Keywords: Coalbed methane£»enhanced coalbed methane£»well network£»absorption with variable pressure