Variations in reflection amplitude, apparent frequency, continuity, external form and internal reflection configuration have long been used to interpret geological information (Vail et al., 1977). The vertical seismic section (dip section in Fig. 6) is used for interpreting seismicfacies to supplement seismic sedimentological studies. Three different kinds of typical seismic facies have been found in the study area. Visible shingled seismic reflections of different scales could be identified in sequences SQ1 and SQ3 in dip section (Fig. 6), which reveal generally a progradational depositional style of deltas. The shingled seismic reflections mainly distributed in the western edge of the Block A and Block B. Worm-like continual strong seismic reflections were found in sequence SQ2, which indicate the different sedimentary environment compared to sequences SQ1 and SQ3. Parallel-subparallel seismic reflection is the main seismic facies of the center region andmainly represent with relatively weak hydrodynamics