1. School of Energy, Faculty of Engineering, China University of Geosciences, Beijing 100083, PR China
2. Exploration and Development Research Institute of Petrochina Changqing Oilfield Company, Xi’an 710018, Shaanxi Province, PR China
3. Nation Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Xi’an 710018, Shaanxi Province, PR China
4. Changqing Oilfield Company of Petrochina, Xi’an 710018, Shaanxi Province, PR China
5. College of Civil Engineering and Architecture, Binzhou University, Binzhou City 256600, Shandong Province, PR China