基于小波分频叠前相干噪声压制方法

基于小波分析的去噪方法在地震资料叠前处理中得到了广泛应用.本文主要介绍利用小波变换的分频特性来压制相干噪声.通过小波分频技术将叠前地震信号分解为不同频带，然后利用有效波和相干干扰波的频谱差异来区分有效信号和噪声，最后利用加权方法去掉不需要的噪声信息来达到去除相干噪声的目的.实际资料的处理结果表明：基于小波分频方法能很好地压制相干噪声，从而提高地震资料信噪比和分辨率.

Prestack coherent noise attenuation based on wavelet frequency-division

As a new mathematical method, wavelet transform have more advantages in seismic noise elimination. In this paper, we introduced the frequency-division characteristics of wavelet transform and used it for coherent noise elimination. First, forming scale function and wavelet function to obtain corresponding frequency response, and then telling effective signals from noises according to their spectrum difference, and last zeroing noise and acquiring signals by adopting wavelet reconstruction algorithm. The method provided is proved to be effective in improving the signal to noise ratio and enhancing the resolution of seismic data by practical seismic data processing.