1. National Key Laboratory of Continental Shale Oil, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
2. School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
3. Institute of Unconventional Oil & Gas, Northeast Petroleum University, Daqing Heilongjiang 163318, China
4. National Key Laboratory of Continental Shale Oil, Daqing Oilfield of CNPC, Daqing, Heilongjiang 163002, China