1. Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China
2. Oil & Gas Technology Research Institute, Changqing Oilfield Branch Company, Petrochina, Xi'an, 710018, China
3. National Engineering Laboratory for Low-permeability Oil & Gas Exploration and Development, Xi'an, 710018, China