Selecting an optimal aperture in Kirchhoff migration using dip-angle images
Selecting an optimal aperture in Kirchhoff migration using dip-angle images
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DOI：
10.1190/geo2013-0109.1
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发表时间：
2013-10
期刊：
影响因子：
3.3
通讯作者：
A. Klokov;Sergey Fomel
中科院分区：
文献类型：
--
作者：
A. Klokov;Sergey Fomel
提出了一种在Kirchhoff偏移中选择偏移孔径的方法。我们首先将偏移数据分割成恒定倾角的局部图像。然后，在每个局部图像中，我们估计每个事件与分析截面的恒定倾角之间的一致性。我们过滤掉斜率远离相应倾角的事件。滤波后的部分图像的堆叠对应于具有最佳孔径的偏移。模拟和实际数据实例表明，本文提出的偏移孔径优化方法能够在保留绕射能量的同时降低偏移噪声，这是小地物的特征，并提高了图像的分辨率。
We present a method for selecting a migration aperture in Kirchhoff migration. We first split migrated data into constant-dip-angle partial images. Then, in every partial image, we estimate the consistency between each event and the constant dip of the analyzed section. We filter out events whose slope is far from the corresponding dip. Stacking of the filtered partial images corresponds to migration having an optimal aperture. Synthetic and real data examples demonstrate that the proposed approach to migration-aperture optimization is able to reduce migration noise while preserving diffraction energy, which characterizes small geologic objects and brings additional resolution to the image.