The singly and multiply scattered waves generated from interfaces of a fractured medium have strong energy, and their propagation directions contain information of fracture parameters. To exploit the useful information in the scattered waves, a fracture scattering imaging method is developed based on reverse time migration and angle decomposition. In this method, a fracture-parameter-related local image matrix is constructed in the angle domain based on the relation between the fracture parameters and the propagation angle of the scattered waves. The distribution of the scattered waves in the proposed image matrix can be used to invert for fracture parameters and identify the energy of scattered waves. Images of the fractures can be obtained by summing up the energy of the scattered waves from the proposed image matrix. Synthetic and field examples are provided to determine that the new method is effective in migrating the fracture-scattered waves at the correct spatial position and accurately extracting fracture parameters.

中文翻译：

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角域中使用散射波的裂缝检测

裂缝介质界面产生的单次和多次散射波具有很强的能量，其传播方向包含裂缝参数信息。为了利用散射波中的有用信息，开发了一种基于逆时偏移和角度分解的裂缝散射成像方法。该方法根据裂缝参数与散射波传播角度的关系，在角度域构建与裂缝参数相关的局部图像矩阵。所提出的图像矩阵中散射波的分布可用于反演裂缝参数并识别散射波的能量。可以通过从建议的图像矩阵中总结散射波的能量来获得裂缝的图像。