1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
2. College of Material Science and Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
3. Engineering Research Center of Oilfield Chemical, Ministry of Education, Chengdu 610500, P. R. China
4. Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Chengdu 610500, P. R. China