Shale Gas Differential Enrichment

As the main flow channel and storage space, natural fractures have a significant impact on shale gas distribution (Ding et al. in Mar Petrol Geol 45:121–133, 2013; Wang et al. in Fuel 170:84–91, 2016) and shale gas well productivity (Gale et al. in AAPG Bull 91:603–622, 2007) in the Sichuan Basin. The main block of Jiaoshiba area and the Jiangdong block are located in the core of the faulted anticline, which belongs to structurally stable region.