In Weibei tidal area,channel interaction and large-scale underground brine extraction for salt production leads to
abundant special surface structures such as quicksand layers and hole low-velocity bodies,resulting in extremely
seriously lateral and longtitual variation in near-surface velocity,thickness and lithology,serious absorption and
attenuation,and weak down-going seismic shooting energy.Starting from near-surface media
characteristics,geological structure model is built to simulate and analyze the seismic shooting effect with different-
scale & different-buried-depth of low-velocity bodies,different shooting depth and different surrounding
media.Then,we conclude the principles of layout and seismic source:preferred clay,avoid the low-velocity body or
drill through the low-velocity body.The quality of seismic data has been improved;the multiples interference and
low-frequency noises have been weakened according to the method.
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