1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Changping District, Beijing 102249, PR China
2. College of Geoscience, China University of Petroleum, Changping District, Beijing 102249, PR China
3. Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, PR China
4. Unconventional Natural Gas Institute, China University of Petroleum, Beijing 102249, PR China