Prototype Basin Chracterization of Huagang Formation of Xihu Depression, East China Sea Shelf Basin
Li Xiangquan
Liu Jinshui
Lu Yongchao
Jiang Yiming
Du Xuebin
Chen Ping
Abstract：Xihu depression is the most important petroliferous structural units,and the Huagang Formation is the major target stratum for petroleum exploration in the East China Sea shelf basin.However,the prototype basin type of Huagang period is still controversial and lack of persuasive evidences up till now.According to the 2D seismic data interpretation,the system analysis of key surfaces' features,basin infilling geometry,basin transforming and erosion,it is proposed that the Huagang prototype basin is a large-scale compressional depression.The T30 seismic reflector,which acts as the initial surface of Huagang prototype basin,represents a regional uplift-erosion unconformity under compressional background.The T20 seismic reflector,which acts as the transforming surface of Huagang prototype basin,mainly stands for a regional uplift-erosion unconformity controlled by the uplifting activities of Diaoyu Dao folded-uplift belt.Further,the formation and evolutionary model of Huagang prototype basin is established.
Keywords：Xihu depressionHuagang Formationprototype basinDiaoyu Dao folded-uplift beltback-arc rift basinseismic stratigraphybasin dynamics
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：12( 502-513 )