Seismic Sedimentology Study on Shayi Sequence

Key words: 
• Huanghua depression /
• Qinan sag /
• seismic sedimentology /
• phase shift /
• stratal slicing

Abstract: The foreign geophysicists and geologists carried through a series of seismic sedimentological studies in North America and Indonesia Basins and got the obvious results in exploration and development of oil and gas. Therefore we carried out seismic sedimentological studies in Qikou Sag of Huanghua Depression using two techniques, that is, phase shift and stratal slicing. On the basis of the exact interpretation of the sequence boundaries, a series of stratal slices were displayed by the Recon software. Those stratal slices provided sequential imagery of depositional systems of Shayi sequence, depicted the distribution range of braidedfan delta deposit through the geologic time and the position of underwater branch channels and interchannels. This study provided the reliable evidence for searching the subtle traps of the area.