周期性粗糙界面地震绕射波数值仿真与分析OA

As an important means of studying seismic waves in exploration seismology,numerical simulation provides a power-ful scientific basis for field data acquisition and processing.As an important supplement to reflection seismic imaging,diffracted waves can improve the imaging resolution.Therefore,it is particularly important to effectively identify and confirm the diffracted wave components in the data.Taking the sinusoidal rough interface as the research object,the spectral element method(SEM)is used to analyze the propagation law of diffracted waves and determine the spatial distribution characteristics of diffracted waves.The results show that different order diffraction waves are produced after the interaction between seismic waves and sinusoidal in-terfaces,and their kinematic characteristics satisfy the grating equation,and the higher order diffraction waves have more serious angular dispersion.In addition,the simulation results play an important auxiliary role in students'in-depth understanding of the influence of diffracted waves on seismic data processing.