【摘要】 克希霍夫三维偏移过程中,由于受假频的影响,偏移成像结果的质量往往会降低。针对这一现象,主要探讨了算子反假频问题。其思路是首先获取相关的算子假频准则,然后通过对地震道进行局部的三角形滤波,从而实现对偏移算子进行反假频处理。通过实际资料的应用可看出,与常规孔径加权法相比,基于三角形滤波的反假频技术能够有效地去除算子假频。更多还原

【Abstract】 Degradation in the quality of migration images can arise because of alias during Kirchhoff 3-D migration. Aiming at this phenomenon, operator anti-aliasing was discussed. The main method is firstly to derive the relevant operator aliasing criteria and then present our efficient method of anti-aliasing the migration operator by local triangle filtering of the seismic trace. With the application to real seismic data, it’s shown that anti-aliased technique based on triangle filter can effectively remove operator aliasing compared with a conventional aperture-weighted approach.更多还原