1. Key Laboratory of Improving Oil Recovery by Ministry of Education, Northeast Petroleum University , Daqing , 163000 , P. R. China
2. Liaohe Petroleum Exploration Bureau Co., Ltd. Materials Branch , Panjin , 124010 , P. R. China
3. CNPC Greatwall Drilling Company, Drilling Fluids Company , Panjin , 124010 , P. R. China