去相位相干反褶积

DEPHASE COHERENCE DECONVOLUTION

成都地质学院

本文指出:频率加强滤波对非零相位记录处理效果欠佳;去相位滤波的期望信号若取成尖脉冲,则对频率时变的适应性差,而由记录子波转换,又会降低分辨率。本文提出把去相位滤波、相干滤波和分辨滤波串联起来,即构成去相位相干反褶积,它可使上述问题得到圆满解决。文中讨论了计算方法,经理论试算表明,这种方法对提高地震记录的分辨率和信噪比都能取得效果。

It is pointed out in the paper that the result of nonzero phase record handled with Frequency Reinforcement Filtering doesn't appear so good. And if the desired signal of dephase filtering is taken as spike then its adaptability to frequency time-variant will become poor. But the resolution would be decreased again while it is converted from record wavelet. The paper suggests that to have the dephase filtering, coherence filtering and resolution filtering connected in series, the dephase coherence deconvolution can thus be constituted and the said problems could be satisfactorily resolved. Also, the way of computing is discussed in the paper. From the trial theoretical computation, it shows that a remarkable effect could be pro-duced from the recommended technique in the paper both in resolution and S/N of seismo-gram.