1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China
2. Key Laboratory of Oilfield Chemistry of CNPC, Beijing 100083, China
3. School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
4. Beijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences (Beijing), Beijing 100083, China