Changfu Liu
Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, P. R. China School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
China

Li Zhang
Geological Exploration & Development Research Institute, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu 610051, P. R. China
China

Yongchen Li
PetroChina Coalbed Methane Company Limited, Beijing 100028, P. R. China
China

Fugui Liu
Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, P. R. China School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
China

Dmitriy A. Martyushev
Department of Oil and Gas Technologies, Perm National Research Polytechnic University, Perm 614990, Russia
Russian Federation

Yongfei Yang
Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, P. R. China School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
China