Application Research Of Near Surface Traveltime Tomography Velocity Modeling Method

Complex structure imaging is always the key and difficult point in seismic data processing,and an accurate velocity model plays an important role in the imaging of complex structures.Because of the low velocity zone in the near surface,there is a great influence on the propagation path and propagation velocity of seismic wave.In this paper,the modeling method of traveltime tomography based on traveltime is studied,which aims to improve the imaging effect of pre-stack depth migration.In this paper,firstly,the research significance and research status of traveltime tomography are introduced,and the development of this technique is illustrated.Then the propagation law of seismic wave and the possible type of direct wave are introduced.After that,we study the principle of each step of velocity modeling.Finally,the practical application of velocity modeling technique in a seismic block in Malaysia is studied,and the pre-stack depth migration is solved.In this paper,the theory is combined with practice to deepen the understanding and understanding of the technology,and further verify the reliability of the traveltime tomography model in the application of actual data.