1. Polymer Research Institute, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
2. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
3. EOR Laboratory, Exploration & Development Research Institute, Daqing Oilfield Company, PetroChina, Daqing 163712, China
4. School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China