1. Daqing Oilfield Co, Ltd, Daqing, P. R. China
2. State Key Laboratory of Continental Shale Oil, Daqing, P. R. China
3. Research Institute of Oil Production Engineering of Daqing Oilfield Co., Ltd, Daqing, P. R. China
4. Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing, P. R. China