Ground-roll attenuation using the directional derivative trace transform
Ground-roll attenuation using the directional derivative trace transform
复制标题
使用方向导数迹线变换进行地滚波衰减
DOI：
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发表时间：
2012
影响因子：
1.4
通讯作者：
Wu Ning
中科院分区：
文献类型：
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作者：
Nie Peng-Fei;Li Yue;Zeng Qian;Lin Hong-Bo;Wu Ning
地滚波是地震勘探中常见的噪声，主要是相干噪声，它会使地震勘探的信噪比大大降低。由于地滚波与反射波是相干的，而且它们的频谱总是重叠的。外科手术屏蔽作为一种常用的去噪方法，会造成波形失真和信息丢失。本文提出了一种新的去噪方法，本文给出了衰减地滚波的方向导数道变换的正、逆变换，并进行了推导，地震记录的方向导数道变换包括两个完全不同的部分：一部分主要表现为能量高度集中的地滚波，另一部分表现为能量明显散射的反射波，根据这两部分，在方向导数道变换域中确定一个能抑制地滚波的门限，从而达到抑制地滚波的目的。滚动衰减可以通过反向方向导数道变换来实现，以使反射回到时间，仿真和实测数据验证了该方法的可行性和有效性。
Ground-roll is common and mainly coherent noise in seismic surveys for a significant reduction in the signal-to-noise ratio.Since the ground-roll is coherent with reflections and the spectrums of them are always overlapping.Surgical muting as a common way to filtering ground-roll will cause waveform distortions and information missing.We present a novel method,namely directional derivative trace transform to attenuate ground-roll.The forward and inverse transform are given and derived in this paper.The directional derivative trace transform of seismic records contains two entirely different parts: one part is mainly representing ground-roll where the energy is highly centralized,the other shows reflections where energy is obviously scattered.According to these two parts,we can determine a threshold which can suppress the ground-roll in the domain of directional derivative trace transform.Then the purpose of ground-roll attenuation can be achieved by the inverse directional derivative trace transform to make reflections back to time-space domain.The feasibility and effectiveness of the proposed method is confirmed by implementation on simulations and field data.