摘要:
针对高密度宽方位3D3C地震资料处理要求,考虑有效信号与噪声在类型、时间、频率、数据域、处理步骤、地表区域等方面存在的差异,选择多域分步去噪策略,在不损害有效信号的前提下,首先使用十字排列锥形滤波去除面波、线性噪声,然后采用低频噪声编辑去除残余面波及低频噪声,接着进行分频去噪来去除各类随机噪声,最后去除折射波。从单炮记录和叠加剖面的监控显示上都证明了该方法的有效性,资料信噪比也得到提高。
关键词:
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3D3C
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十字排列
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面波
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多域
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去噪
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信噪比
Abstract:
In the light of the processing requirements of the high-density wide-azimuth 3D3C seismic data and in consideration of the difference between the signal and the noise in such aspects as type,time,frequency,data field,processing step and surface area,the au-thors chose the means of multi-domain step-by-step de-noising.Under the prerequisite of not damaging the effective signal,the cross ar-ranged cone wave filter was adopted first to remove surface wave and linear noise,then the low-frequency noise compilation was em-ployed to remove residual surface wave and low-frequency noise,followed by frequency division de-noising for removing various kinds of random noise.At last,the refraction wave was removed.The monitoring display of single shot record and stacking profile has proved the effectiveness of this method and the improvement of the signal-to-noise ratio.
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