1. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs , Xi’an Shiyou University , Xi’an , 710065 , China
2. Engineering Research Center of Oil and Gas Field Chemistry , Universities of Shaanxi Provence, Xi’an Shiyou University , Xi’an , 710065 , China
3. No. 2 Oil Production Factory, Changqing Oilfield, PetroChina Changqing Oilfield , Qingyang , 745100 , China
4. China University of Petroleum (Huadong) , Qingdao , 266580 , China
5. Changqing Oilfield Branch Oil and Gas Technology Research Institute, CNPC , Xi’an , 710060 , China