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《Coal Science and Technology》 2014-12
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Influence of High-rank Coal Reservoir Sensitivity on Coalbed Methane Wells Production

BAI Jian-ping;Shanxi Lanyan CBM Group Co. Ltd.;  
In order to realize the efficient exploitation of coalbed methane in high- rank coal reservoir,the velocity sensitivity and stress sensitivity of Sihe No. 3 coal seam were experimented and analyzed. Based on the engineering,the influence of high- rank coal reservoir sensitivity on coalbed methane wells production was analyzed. The experimental results showed that,high- rank coal reservoir had the feature of velocity sensitivity,the permeability could reduce to 50% of initial value to the maximum extent,directional flooding would also reduce permeability,the minimum reduce to 62. 1% of initial value,the higher the clay content of the reservoir was,the lower the permeability decreasing amplitude would be. The high- rank coal reservoir had a strong stress sensitivity and existed apparent irreversibility; when the net confining pressure increased from 2 MPa to 5 MPa,the permeability decreased as 20% ~ 50% of the initial permeability,after the buck boost,the permeability could not resume to the initial level,the maximum of irreversible damage rate was more than 50%,the lower the reservoir permeability was,the stronger the stress sensitivity would be. The coalbed methane wells production process should follow continuous,slow and stable principle,especially in initial stage.
【Fund】: 山西省煤层气联合研究基金资助项目(2012012006);; 国家科技重大专项资助项目(2011ZX05063)
【CateGory Index】: TE37
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【Secondary Citations】
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1 ZHANG Shicheng,MOU Shanbo,ZHANG Jin,WANG Lei MOE Key Laboratory of Petroleum Engineering in China University of Petroleum,Beijing,102249;Experimental Evaluation of Long-term Conductivity of Fracturing in Coal Beds[J];Acta Geologica Sinica;2008-10
2 SHI Wei,SANG Shuxun,ZHOU Xiaozhi,HUANG Huazhou,LIU Huihu,XU Hongjie(College of Mineral Resource and Geological Science,Key Laboratory of CBM Resources and Reservoir Formation Process,China University of Mining and Technology,Xuzhou 221116,China);Analysis of the fracturing slit’s delivery capacity in Qinshui basin[J];Coal Geology & Exploration;2011-03
3 GUO Chunhua1,2,ZHOU Wen1,2,SUN Hansen3,YANG Yong4(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610059,China;2.Chengdu University of Technology,Chengdu 610059,China;3.China United Coalbed Methane Company Ltd.Beijing 100011,China;4.Institute of Petro China,Changqing Oilfield Company,Xi'an 710003,China);The relationship between stress sensitivity and production of coal bed methane wells[J];Coal Geology & Exploration;2011-05
4 LIN Xin1,2,ZHANG Shicheng1,ZHANG Jin1,ZHANG Ping1,3(1.Key Laboratory for Petroleum Engineering of the Ministry of Education,China University of Petroleum,Beijing 102249,China;Chang Qing Oilfield Company,China Pertoleum,Xi′an 710021,China;3.China United Coalbed Methane Co.Ltd.,Beijing 100011,China);Sensitivity evaluation experiment of Liulin CBM reservoir[J];Coal Geology & Exploration;2011-06
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8 NI Xiao-ming1,SU Xian-bo1,WEI Qing-xi1,WU Jian-guang2(1.School of Energy Science and Engineering,Key Laboratory of Biogenictrace Sand Mineralization Process of Henan Province,Henan Polytechnic University,Jiaozuo 454000,China;2.China United Coal-bed Methane Co.Ltd.,Beijing 100011,China);The relationship between the permeability of coal bed and production curve about coal-bed methane vertical wells[J];Journal of China Coal Society;2009-09
9 MENG Zhao-ping1,2,TIAN Yong-dong3,LI Guo-fu3(1.College of Geosciences and Surveying Engineering,China University of Mining & Technology(Beijing),Beijing 100083,China;2.Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education,China Three Gorges University,Yichang 443002,China;3.Qinshui Lanyan Coalbed Methane Co.,Ltd.,Jincheng 048204,China);Characteristics of in-situ stress field in Southern Qinshui Basin and its research significance[J];Journal of China Coal Society;2010-06
10 ZOU Yu-shi,MA Xin-fang,WANG Lei,LIN Xin(State Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing),Beijing 102249,China);Experimental evaluation of conductivity of fracturing in medium and high-rank coal beds[J];Journal of China Coal Society;2011-03
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