1. State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, Shandong, China
2. Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, China University of Petroleum (East China), Qingdao 266580, Shandong, China
3. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China