1. School of Petroleum Engineering, Xi’an Shiyou University, 710065 Xi’an, China
2. Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil & Gas Reservoirs in West China, Ministry of Education, 710065 Xi’an, China
3. Xi’an Key Laboratory of Tight Oil (Shale Oil) Development, 710065 Xi’an, China
4. Petro China Changqing Oilfield Co, Oil & Gas Technol Res Inst, 710021 Xi’an, China
5. Natl Engn Lab Explorat & Dev Low Permeabil Oil & G, 710021 Xi’an, China
6. Petro China Yumen Oilfield Co, Ltd, Engineering and Technology Research Institute, 735000 Jiuquan, China
7. Shaanxi Key Laboratory of Lacklustre Shale Gas Accumulation and Exploration, 710000 Xi’an, Shaanxi, China
8. Department of Electrical Engineering and Computer Science, University of Stavanger, 4036 Stavanger, Norway