1. Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, Shandong266580, People’s Republic of China
2. Shale Gas Research Institute of PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan610051, People’s Republic of China
3. Sanya Offshore Oil & Gas Research Institute, Northeast Petroleum University, Sanya, Hainan572025, People’s Republic of China
4. Key Laboratory of Continental Shale Hydrocarbon Accumulation and Efficient Development, Ministry of Education, Northeast Petroleum University, Daqing, Heilongjiang163318, People’s Republic of China