摘要
Based on shallow 3D seismic data with high resolution, shallow deepwater channels in the Baiyun deepwater region are studied. Large amounts of deepwater channels generate in the slope and the slope base of Baiyun Sag. The channels are classified into 3 types: erosional, erosional/aggradational and aggradational. The geometries of deepwater channels change along with gradient. On the upper slope,single deep feeding channel develops. On the basin floor with unconfined environment, small channels spread laterally.In plane view, channel shapes may be straight or bended. The vertical changing characteristics of erosional/aggradational channels in the Baiyun Sag are concluded as follows: grain size decreases upwards. Mastering channels are found at the bottom and leveed channels are found at the top.