Based on substantial 2-D,3-D seismic and drilling data,spatial-temporal evolution of the No.2fault zone was studied quantificationally and in great detail by using the methods of palaeo-drop and fault activity rate.The controlling effect of syndepositional faulting and corresponding structural framework of the No.2fault zone on geometry and its inner constitution of sequence stratigraphy,and spatial-temporal configuration of sand dispersal systems in the north margin of Songnan-Baodao sag were further studi...