基于空间变换的F-X域地震去噪新方法

地震记录的高信噪比与高分辨率处理几乎涵盖了地震资料处理的全部内容，高分辨率处理是以高信噪比处理为前提的，没有一定的信噪比而一味地追求高分辨率是徒劳的。因此，提出了一种适应复杂构造地区地震资料去噪的新方法－－基于空间变换的F－X域地震去噪新方法。该方法首先利用正交多项式逼近技术，采用最大相似系数准则计算出描述地震同相轴走势的有关系数。然后，利用这些系数对地震数据在横向作线性化变换，并对变换后的地震数据进行奇异滤波和F－X域有效信号预测。最后，对得到的预测结果进行反拟线性变换，即完成整个去噪过程。理论数据和实际资料试算结果表明，该方法能较好地适应复杂构造，具有较强的去随机干扰能力，保真性较好。

The New Method for Noise Attenuation of Seismic Data based on Space Transform in F-X Domain

A new noise attenuation algorithm had been proposed in this paper, which is suitable for data processing in complex geological structure.Firstly, the approximation by orthogonal multinomial and the maximum semblable rule of coefficient of correction have been employed to calculate the relevant coefficients that described the trends of seismic events.The calculated coefficients were used to linearized transform for the seismic data in lateral direction. And then, the transformed seismic data were filtered with its singularity and the effective signals was predicted in F-X domain.Finally, the inverse transformation is applied to seismic data that were predicted. That is all the noise attenuation process. The results of theoretical and actual data have shown that the method has the following advantages: suitable for data processing in complex geological structure ;powerful ability for eliminating random disturbance;good amplitude fidelity.