1. School of petroleum engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
2. College of energy and mining engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
3. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China
4. Drilling & Production technology Research Institute of Jidong oilfield, CNPC, Tangshan, Hebei 063000, China