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叠后地震剖面中,反射信号在空间上具有相干的特性.利用这一特性,本文提出了一种信号增强的方法,即沿反射信号相干方向用最小平方误差准则对信号作线性估计.为了正确确定含噪地震剖面的相干方向,文章首先确定使相似度量为最大的方向,然后再用中值滤波平滑这些方向,所得的结果基本上可以表示反射信号相干方向.为了保证断点不被模糊和横向分辨率不降低,文中定义了右相似度和左相似度,从而使我们可以向左或向右做信号估计.实际资料方面的例子表明,本文提出的方法对含噪声剖面具有很好的增强信号的能力.
In the post-stack seismic profile, the reflected signal has the spatially coherent property. By using this property, a method of signal enhancement is proposed in this paper, that is, the signal is linearly estimated with the least squares error criterion along the direction of the reflected signal. To determine the coherence direction of the noisy seismic section, the article first determines the direction that maximizes the similarity measure and then smoothes these directions with median filtering, and the result is basically indicative of the coherent direction of the reflected signal. In order to ensure that the breakpoint is not obscured and The horizontal resolution is not reduced, the right similarity and the left similarity are defined in this paper, so that we can make the signal estimation to the left or the right.Examples of the actual data show that the proposed method has a good enhancement to the noise profile Signal ability.