1. Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, P. R. China
2. Key Laboratory of Unconventional Oil & Gas Development, Ministry of Education, China University of Petroleum (East China), Qingdao 266580, P. R. China
3. Offshore Oil Engineering Co., Ltd, Tianjin 300451, People’s Republic of China