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中文摘要：
绕射波是地下小尺度不连续体的地震响应，是对地下断层、尖灭点、河道边界等高精度成像的关键。为了充分利用绕射波信息，本文通过在传统的Kirchhoff偏移算子中引入反稳相滤波器，使满足Snell定律的镜面反射得到有效压制，从而凸显绕射能量；进一步，针对边缘绕射存在的极性反转现象，在成像过程中引入校正极性算子实现边缘绕射正确成像。在实现方法的基础上，通过理论模型和实际资料边缘绕射成像试处理发现：本文方法能有效改善断点及断层边芥成像质量，提高地震解释精度；通过极性校正，能一定程度提高边缘绕射点成像分辨率。
英文摘要：
As the seismic response of small-size geologic discontinuities, diffraction is of great value for the high resolution imaging of faults, pinch-outs and channel edges. In order to make full use of the information carried by diffraction, this paper apply an anti-stationary phase filtering inside the traditional Kirchhoff pre-stack migration operator, which effectively attenuates events energy satisfying Snell＇ s law. In addition, considering the polarity reversal of edge diffraction, a polarity correction operator is introduced to improve the edge diffraction image during the migration. Edge diffraction imaging both for theoretical model and field data draw the following conclusions： this method can effectively improve the image quality of breakpoints and fault boundary, leading a high resolution result for seismic interpretation; Benefit from the polarity correction, our method can also improve the imaging resolution of the edge diffraction.
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