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