1. College of Petroleum Engineering/Postdoctoral Innovation Base, Xi’an ShiYou University, Xi’an, Shaanxi, China;
2. Center for Post-doctoral Studies, China University of Petroleum, Beijing, China;
3. College of Geosciences, China University of Petroleum, Beijing, China;
4. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, College of Petroleum Engineering, Xían ShiYou University, Xían, Shaanxi, China