预叠加解卷积的某些方面

Jagmeet Singh
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引用次数: 0

摘要

在之前的一篇论文中,我们已经证明,由于入射角度不同,沿轨迹向下卷积的程度也不同,因此需要随时间和偏移而变化的解卷积算子。我们在 $t$-$x$ 和 $\tau$-$p$ 域进一步研究了这一想法。我们提出了在 $t$-$x$ 和 $tau$-$p$ 域中对数据进行解卷积的更好方法,同时考虑到了该域中不同程度的卷积。我们推导出了$\tau$-$p$域中表面倍频的周期公式,例如,水柱钉足和混响,它们有一个固定的周期,只取决于$p$的值--并建议在倍频与主频很好分离的情况下,使用公式来检查/修正采样速度。此外,还研究了双向表面倍频的周期性。
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Certain aspects of prestack deconvolution
In a previous paper, we had shown that because of varying angles of incidence there is a varying degree of convolution down a trace and across a gather, necessitating deconvolution operators varying with time and offset. This idea is examined further in $t$-$x$ as well as $\tau$-$p$ domain. We suggest better ways to deconvolve data in $\tau$-$p$ domain, taking into account varying degree of convolution in this domain. We derive formulae for periods of surface multiples in $\tau$-$p$ domain, e.g., water column peg-legs and reverberations, which have a fixed period depending only on the value of $p$ -- and suggest a way to check/revise the picked velocity using the formulae, provided the multiples are well separated from the primary. Periodicity of two way surface multiples is also studied.
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