Application of Seismic Sedimentology Based on Frequency Division CMY Fusion Optimization in Shallow Channel Characterization in Xihu Depression
A shallow delta was developed in the H2 Fm of QY-HY area in Xihu sag,where the thin channel sand body involves multiple periods and changes rapidly.It is difficult to ac-curately identify the channel distribution by the traditional method.Based on the characteris-tics of the sand body of the target layer,this paper effectively integrated the specific frequen-cy band of seismic data,built isochronal strati-graphic framework,applied seismic sedimenta-ry technology on the H2 Fm,characterized the H2 channel and analyzed the sedimentary evo-lution of the H2 Fm.By the innovative application of frequency division and CMY(Cyan-Megenta-Yellow)fusion to all-band-scan the seismic data.The results show that the whole period of H2 is characterized by water intrusion,and the river channel develops from west to east and the scale of early channel is larger than that of late channel.The seismic sedimentol-ogy optimized by the frequency-division CMY fusion method has certain feasibility in charac-terizing small-scale channels and sedimentary evolution.
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