1. School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China
2. Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum, Qingdao, Shandong 266580, China
3. Daqing Oilfield Production Technology Institute, Daqing, Heilongjiang 163453, China
4. Exploration and Development Research Institute of PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China