应用同态理论估算地震子波

本文讨论的是用同态理论从地震记录中估算地震子波的方法。具体做法是在一道(或若干道)地震记录上,取较长的、子波比较稳定的记录段,并在这一段(或若干段)的不同位置上取若干个较短的小时窗段,乘以适当的窗函数,再取其对数谱的算术平均值作为地震子波的对数谱,经同态系统的逆过程得到地震子波的估计值。在人工合成记录和一些实际地震记录上的实验表明,这种方法在一定的精度范围内是有实用价值的。

The estimation of seismic wavelet by homomorphic theory

This paper presents a method for estimating seismic wavelet from seismic record by homomorphic theory.The concrete procedure of this method is,first,to choose a longer record segment whose seismic wavelet is stable on a single trace(or several traces),secondly,to make several shorter time windows,multiplied by a proper window function,at different locations of the record segment(or several segments),thirdly,to take the arithmetical mean of its logarithmic spectra as the logarithmic spectrum of seismic wavelet and finally,to obtain the estimation value of seismic wavelet by applying inverse homomorphic process.The experiments on artificial synthetic seismogram and actual seismic records show that this method is of practical use in proper accuracy range.