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