基于非线性滤波的叠加速度分析方法和应用

Stacking velocity analysis based on nonlinear filtering and its application.

叠前道集中存在的野值、随机噪音以及某些弱相干噪音(如多次波)是典型的叠前噪音。这些噪音具有某些特殊的规律,可以利用叠前某种道集的特性进行压制。进行压制时的滤波技术是否有效,关键在于叠加速度是否准确。提出了一种新的叠加速度分析方法,并详细描述了基于这种新的叠加速度分析进行叠前随机噪音衰减和野值压制的原理、实现步骤、应用条件以及应用效果。

Outliers, random noises, and some coherent noises (e. g. multiples) are the noises typically existing in prestack gathers. These noises manifest certain behaviors, thus can be suppressed according to the properties of the prestack gathers. The effectiveness of filtering depends on the correctness of stacking velocity. This paper presented a new approach for stacking velocity analysis, and discussed the principles, procedure, applicability, and applications of suppression of prestack random noises and outliers based on the new stacking velocity analysis method.