1. Shandong Key Laboratory of Oilfield Chemistry, School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
2. Key Laboratory of Unconventional Oil &Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, China
3. The First Natural Gas Plant, PetroChina Changqing Oilfield Company, Jingbian 718500, Shaanxi, China
4. Technology Inspection Center, Shengli Oilfield Company, SINOPEC, Dongying 257000, China