1. Key Laboratory of Oilfield Chemistry, CNPC, Research Institute of Petroleum Exploration & Development (RIPED), PetroChina, Beijing 100083, China
2. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China
3. National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields, Oil and Gas Technology Research Institute, PetroChina Changqing Oilfield Company, Xi'an 710018, China