起伏地表多波共炮记录叠前深度偏移

共炮记录偏移方法以几何扩散原理为基础的共炮记录偏移方法适用于复杂的起伏地表。通常来说,对于起伏地表地震资料的处理首先要进行地表一致静校正,实际上,这样做无疑破坏了反射点相对炮、检波点的几何位置关系,使最终资料成像的质量受到影响。地震记录的波场是在根据震源波场和检波点波场的相关值产生的,那么我们同样可以根据二者的相关将地震记录上的波场值还原,只是此时的波场值增加了其他反射波场的成分,但没关系,通过空间位置的波场叠加,其他反射波场的成分自然会被压制或消除。

Rolling Topography Common-shot Prestack Depth Migration

Common-shot prestack depth migration based on Principles of Geometry proliferation be suitable for complex Undulating Surface.Normally,first of the processing of the undulating surface seismic data is surface-consistent static.Actually it is Undoubtedly that ding that should Undermine Geometrical relationship between Shot Point and Seismometer Point.It should seriously affect Imaging Quality of seismic data.Seismograms＇s Wavefield come from Cross-correlation values of source wavefield and Seismometer wavefield.So according to the relationship of two we also can restore seismograms＇s wavefield＇s values.By this way ingrediens of other reflected wavefield are increased in the wavefield＇s values.But it doesn＇t matter,by way of Spatial location stacking,ingrediens of other reflected wavefield should be suppressed or eliminated.