Discussion on Depositional Mechanism Controlled by Axis-wise Drainage in Huagang Formation(Oligocene)of Xihu Trough, the East China Sea

Huagang Formation,in Xihu Trough,is tectonic controlling terrestrial deposits,well data and regional geologic analysis have demonstrated tectonic controlled drainage system distribution.Based on some wells's data,this paper gives emphasis on tectonic cyclothems analysis in Longjing Well 1?Huagang Well 1?Yuquan Well 1 and Yuquan Well 2 which are lined along axis wise drainage,re establishes the basin fill history,provides well data analysis for terrestrial sequence stratigraphy,and put forwards new points on well to well connection of sand bodies.