In this system, front distributary channel, mouth bar, interdistributary channel, plain braided channel and inter braided channel are main sandbodies in Tuyuke area of Tainan sag in Tuha basin.

• 其储集特征主要受岩性、沉积微相、成岩作用等因素控制,前缘分流河道砂体和河口坝砂体物性好,原生孔隙及次生孔隙均较发育,辫状河道及河道间砂体物性较差。