Sedimentary characteristics and genetic mechanism of a deep-water channel system in the Zhujiang Formation of Baiyun Sag, Pearl River Mouth Basin

The external geometry, internal architecture and sedimentary evolution processes of the deep-water channel system in Zhujiang Formation Midwest Baiyun Sag have been revealed detail according to integrated analysis 3D seismic data a large number drilling logging sets. In addition, controlling effect sediment supply, sea level change, shelf break zone palaeogeomorphology on was discussed. Finally, it is concluded that development distribution controlled by both provenance landform. can be subdivided into different sections: area, waterway area. It presents features ‘three segment channel’ which indicates fluid energy gravity flow changes from weak strong then along depositional inclination. Because filling latter reformation experienced sections during periods are complex, inner characteristics channels different, mainly high sand-shale ratio superimposed (sand-rich deposit) low channel-levee complex (sand-lean deposit). clear spatial edge delta Pearl River, forced regression, restricted landform collectively. at lower member north provides amount clastic sediments for system. Forced regression drives continuous transportation fault slope provide favorable paths topographic conditions fracture systems subaqueous uplifts influenced together.