Simulation of dynamic changes of methane state based on NMR during coalbed methane output

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• 作者：Xiaolei Liu ; Caifang Wu ; ^{caifangwu@sina.com}
• 关键词：CBM ; Adsorption ; Desorption ; NMR ; Displacement ; Water
• 刊名：Fuel
• 出版年：2017
• 出版时间：15 April 2017
• 年：2017
• 卷：194
• 期：Complete
• 页码：188-194
• 全文大小：973 K
• 卷排序：194

文摘

Adsorption and desorption of dried coal follow a logarithmic relation with time. Adsorption is from larger pores to smaller pores in the adsorption pores. The adsorption rate during the initial stage does not correlate to the pressure. Adsorption process includes three stages and reversibility is affected by water. The bottom hole pressure difference plays a dual role during the production of CBM.