1. Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, China
2. College of Marine Science and Technology, China University of Geosciences, Wuhan 430074, China
3. SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
4. Spallation Neutron Source Science Center, Dongguan 523803, China
5. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
6. National Joint Engineering Research Center for Shale Gas Exploration and Development (Chongqing Institute of Geology & Mineral Resources), Chongqing 401120, China
7. Key Laboratory of Shale Gas Exploration, Ministry of Natural Resources (Chongqing Institute of Geology & Mineral Resources), Chongqing 401120, China