1. Research Institute of Petroleum Engineering and Technology, Sinopec Northwest Oilfield Company, Urumqi 830011, China
2. Key Laboratory for Enhanced Oil and Gas Recovery of the Ministry of Education, Northeast Petroleum University, Daqing 163318, China
3. Department of Petroleum Engineering, University of North Dakota, Grand Forks 58202-6116, ND
4. School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, China