Strike-Slip Fault Effects on Diversity of the Ediacaran Mound-Shoal Distribution in the Central Sichuan Intracratonic Basin, China

The largest Precambrian gasfield in China has been found from the Ediacaran (Sinian) carbonates central Sichuan Basin. deep ancient reservoirs were generally attributed to high-energy mound-shoal body carbonate platform. However, there is still little understanding on distribution of bodies that hampers further gas exploitation subsurface. Based seismic data, a large strike-slip fault system was identified by new 3D data Further, it had some effects Dengying Formation. First, platform margin divided faults into three distinct segments show two weak-rimmed margins and one interbedded rimmed margin. Second, could be offset or migrated with faults. Third, varied thickness across zone. In inner platform, more developed behind zones. addition, may separated faulted sag. have along higher position side These patterns suggest an important role sedimentary microfacies’ diversity intracratonic carbonates. low displacement chiefly responsible for weaker controlling effect microfacies change basin rather than other tectonic settings.