三维VSP波动方程保幅叠前深度偏移方法

VSP偏移成像技术在VSP资料处理中具有重要意义。为了对地下复杂构造进行精确成像，常要求对VSP数据进行三维叠前偏移处理。传统的单程波方程延拓计算时只能保证相位信息的正确性，没有对振幅做任何处理，仍存在保幅性较差的问题，不利于将其结果运用到岩性分析中去。本文以保幅型单程波偏移算子为基础，研究了三维VSP单程波动方程保幅偏移成像方法。并在实际资料中，采用了保幅型三维地震道插值方法，对非规则网格炮点采集的三维VSP数据进行插值，保证了波动方程保幅偏移的效果。

Amplitude-preserved Wave Equation Prestack Depth Migration in 3D VSP Data

Traditional 3D-VSP one-way wave equation migration methods have characteristics of high accuracy and high computational efficiency, but its poor amplitude-preserved capbility is still problem. In this paper, with the introduction of three-dimensional amplitude-preserved one-way wave migration operator, we finished prestack depth migration in 3D-VSP data, improved the accuracy of imaging results in the amplitude. So that the imaging results could be more conducive to lithology analysis. In actual data processing, we also used amplitude-preserved seismic trace interpolation method in irregular grid arrangement shot points data, solved this problem when we do 3D-VSP migration in common receiver point stacks. Theoretical models and actual data processing results verificated the correctness and validity.