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基于l1范数多项式拟合的多次波消除方法

Keywords: 多次波压制,多项式拟合,l1范数,l2范数,叠加速度谱

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Abstract:

?如何在不损伤一次波的情况下压制多次波是地震信号处理的难点之一。在cdp道集中,一次波和多次波的运动学特征可以由叠加速度和零炮检距时间确定。利用avo特性可以表示一次波(多次波)的振幅随炮检距的变化。假设在速度谱上,多次波和一次波一般是分开的,从而可以进行多次波和一次波的识别。本文提出一种沿着多次波的双曲线轨迹,利用基于l1范数的多项式拟合技术估计多次波的方法,可以有效地消除一次波和随机噪声对预测多次波的影响。人工合成和实际地震数据处理结果表明,与基于l2范数多项式拟合技术的方法相比,本文算法在有效压制多次波的同时,能更好地保护一次波。

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