三维三分量VSP多种波场分离方法对比

 本文就VSP波场分离的有效手段问题进行了讨论，其中对比了f k滤波、逐波分离迭代优化和局部参数反演等三种波场分离方法。传统的f k滤波要求空间采样间隔足够密，而逐波迭代优化法弥补了传统的f k滤波的不足，解决了实际资料存在的空间采样不规则、子波变化等问题，该方法是一个时间域迭代的整体非线性优化方法，但其缺点是需要手工拾取各同相轴的时间。局部参数反演方法是将波场视为矢量，结合三个分量进行反演的矢量波场分离方法。本文通过对速度和偏振角度施加约束条件达到方法优化的目的，实现了上、下行纵横波快速有效反演，得到了与真实波场较好近似的波场信息。通过对A地区的实际资料进行波场分离及VSP CDP叠加处理，表明局部参数反演的矢量波场分离是一种实用、可靠的波场分离方法。

Comparative studies on 3D3C VSP multiple wave field Separation methods

In this paper effective means for VSP wave field separation were discussed, and three wave field separation methods were compared, the three methods are f-k filtering wave field separation method, the cycle-by-cycle separation iterative optimization wave field separation method and local parameter inversion vector wave field separation method respectively. The traditional f-k filtering method requires dense spatial sample interval, the cycle-by-cycle separation iterative optimization method remedies the def...