[1] School of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an,710065, China
[2] Shaanxi Key Laboratory of Petroleum Accumulation Geology, Xi'an Shiyou University, Xi'an,710065, China
[3] Petrochina Coalbed Methane Company Limited Xinzhou Company, Taiyuan,030000, China
[4] College of Civil Engineering, Guizhou University, Guiyang,550025, China
[5] Unconventional Oil & Gas Branch, CNOOC Co. Ltd., Beijing,100016, China