High rank coalbed methane desorption characteristic and its application in production in Qinshui basin

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• 作者：Bo Wang (1) (2)
  Fen-Jin Sun (2)
  Feng-Yin Xu (1) (3)
  Bo Jiang (1)
  Zhi-Hua Song (1)
  Jun-Hui Wen (4)
  Yang Zhao (2)
  
• 关键词：coalbed methane ; desorption ; isotope ; discharge ; recovery reservoir ; Qinshui basin
• 刊名：Journal of Coal Science and Engineering (China)
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：19
• 期：3
• 页码：321-324
• 全文大小：475KB
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• 作者单位：Bo Wang (1) (2)
  Fen-Jin Sun (2)
  Feng-Yin Xu (1) (3)
  Bo Jiang (1)
  Zhi-Hua Song (1)
  Jun-Hui Wen (4)
  Yang Zhao (2)
  
  1. School of Energy Resources, China University of Geosciences (Beijing), Beijing, 100083, China
  2. Langfang Branch of China Petroleum Exploration and Development Research Institute, Langfang, 065007, China
  3. PetroChina Coalbed Methane Company Limited, Beijing, 100076, China
  4. Research Institute of Regional Geology and Mineral Resources, Shaanxi Bureau of Geological and Mineral Resources, Xianyang, 712000, China
  
• ISSN：1866-6566

文摘

Based on spontaneous desorption characteristic, the correlation of desorption time and gas content was analyzed and the application of it in production was researched. The desorption of high rank coalbed methane in Qinshui basin was periodic, and isotope fractionation effect also exists in the process. Δδ 13C1 can be used to distinguish the stabilization of coalbed methane wells, associated with desorption rate, the individual well recoverable reserves can be calculated. Economically recoverable time can be predicted according to the logarithmic relationship between desorption gas content per ton and desorption time. The error between predicted result and numerical simulation result is only 1.5%.