1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
2. Engineering Technology Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu 610500, P. R. China
3. School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, P. R. China
4. Engineering Research Center of Oilfield Chemistry, Ministry of Education, Chengdu 610500, P. R. China