1. Key Laboratory of Petroleum Drilling and Production, College of Petroleum Engineering Yangtze University Wuhan 430100 P.R. China
2. No. 6 Oil Production Plant of Daqing Oilfield Co., Ltd Daqing 163114 P.R. China
3. PetroChina Research Institute of Petroleum Exploration & Development Beijing 100083 P.R. China
4. CNOOC Research Institute State Key Laboratory of Offshore Oil Exploitation Beijing 100027 P.R. China
5. Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry The Chinese Academy of Sciences Beijing 100083 P.R. China
6. Petroleum Systems Engineering, Faculty of Engineering and Applied Science University of Regina Regina Saskatchewan S4S 0A2 Canada