APPLICATION OF ANISOTROPIC PRESTACK TIME MIGRATION TO MARINE STRATA IN SOUTH YELLOW SEA

Compared to the conventional post-stack migration,the pre-stack time migration can enhance the accuracy of images,increase the ratio of signal to noise and make the wave group characteristics of seismic reflection zone clearer,especially in the areas with complicated structure and strong variation of lateral velocity.In This paper,we proposed a seismic imaging processing flowchart and parameters according to the method of anisotropic Kirchhoff pre-stack time migration, though there were problems in dealing with the available data in imaging and data quality. As the result, the quality of seismic trace gathers and sections and the imaging accuracy were obviously improved.