Seafloor properties play important roles in both the civilian and the military domains. In this paper, we propose to use a regularization-based AVO (amplitude variation with offset) inversion method to estimate the elastic parameters of seafloor sediment along a seismic survey line. Conventional AVO research focuses mainly on the strata beneath seafloor sediment; accordingly, the AVO response of the interface between the seawater and seafloor sediment is typically ignored. Several studies on the estimation of seafloor elastic parameters have been published based on AVO theory. However, these earlier studies only consider one CRP (common reflection point) gather in the inversion process. When dealing with a long seismic survey with many CRPs, earlier methods involve clear random inversion errors along the survey line. To suppress the inversion errors, we try to regularize each of the elastic parameters along the seismic survey by a total-variation method. Synthetic tests demonstrate that the regularization-based method can effectively suppress the inversion errors along the seismic survey and yield much cleaner inversion results. Finally, we apply the regularization-based method to a real two-dimensional marine seismic survey and obtain satisfactory results, which further proves the efficacy of the method.

中文翻译：

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基于正则AVO反演方法的海底弹性参数估计

海底财产在民用和军事领域均起着重要作用。在本文中，我们建议使用基于正则化的AVO（带偏移的振幅变化）反演方法来估算沿地震勘测线的海底沉积物的弹性参数。常规的AVO研究主要集中在海底沉积物下面的地层。因此，通常忽略了海水和海底沉积物之间的界面的AVO响应。基于AVO理论，已经发表了一些有关估计海底弹性参数的研究。但是，这些较早的研究仅考虑了反演过程中一个CRP（共反射点）的聚集。在处理具有许多CRP的长期地震勘测时，较早的方法涉及沿勘测线的明显随机反演误差。为了抑制反演误差，我们尝试通过总变分方法来规范地震测量过程中的每个弹性参数。综合测试表明，基于正则化的方法可以有效地抑制地震勘探过程中的反演误差，并获得更清晰的反演结果。最后，将基于正则化的方法应用于实际的二维海洋地震勘探中，取得了满意的结果，进一步证明了该方法的有效性。