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针对基于波场深度递推的波动方程叠前深度偏移成像方法难以准确地给出如Kirchhoff积分叠前深度偏移成像方法的偏移距域共成像道集的不足,在分析研究现有的各种波动方程偏移成像共成像道集方法的基础上,利用波场外推的单平方根算子和波场的窗口Fourier框架展开与重构方法,提出一种局部角度域共成像道集方法——成像点处反射角共成像道集方法.把这种角度域共成像道集方法应用于国际标准的Marmousi模型数据和一条实际二维地震数据都取得了理想的结果.提出的波动方程反射角度域共成像道集方法可为进一步的叠前偏移数据振幅随角度变化分析和偏移速度分析工作提供基础.
Aiming at the wave equation recursion based on wavefield depth prestack depth migration imaging method, it is difficult to accurately give the deficiencies of co-imaging omni-migration path set, such as Kirchhoff integral prestack depth migration imaging method. In the analysis of existing On the basis of the method of offset image co-imaging gathers, the single square root operator of the wave field extrapolation and the window Fourier frame expansion and reconstruction of the wave field are proposed. A local angle domain co-channel gathers method -Real-angle co-imaging gathers method at imaging point.The ideal results have been obtained by applying this method of common gathers method to the international standard Marmousi model data and an actual two-dimensional seismic data.The proposed wave equation reflection The angle domain co-imaging gathers method can provide the foundation for further prestack migration data amplitude variation analysis and migration velocity analysis.