俞氏子波在地震数据处理中的应用研究

Application of Yu wavelet to seismic data processing.

俞氏子波是由俞寿朋教授提出的一种新型子波 ,它具有主瓣窄、旁瓣幅度小、波形简单、振幅谱光滑连续等特点 ,是目前条件下高分辨率处理中的理想子波。本文简要回顾了俞氏子波的构成及其性质 ,并对它在地震数据处理方面的应用进行了探索 ,即俞氏子波作为子波反褶积的期望输出 ,可以改善反褶积的效果 ;俞氏子波的峰值频率可调 ,它的滤波效果优于带通滤波 ;选择高峰值频率的俞氏子波 ,可提高速度分析的精度 ;俞氏子波用于合成记录 ,可提高其保真度。本文还列举了三种实用的俞氏子波参数分析方法 ,为俞氏子波的使用提供了方便。实践表明 ,俞氏子波在实际数据处理中取得了良好的应用效果。

Yu wavelet is a new wavelet that was designed by Professor Yu Shoupeng. It is characterized by narrow main lobe, low side lobe amplitude, simple waveform, smooth and continuous amplitude spectrum, and so on; so it is a satisfactory wavelet in present high resolution processing. Its construction and characteristics are reviewed in brief; and its applications in seismic data processing are summarized as follows: ·Yu wavelet, the expected output of wavelet deconvolution, may improve deconvolution effect. ·The peak frequency of Yu wavelet is adjustable, and its filtering effect is better than that of bandpass filtering. ·Yu wavelet with peak frequency ameliorates the accuracy of velocity analysis. ·Yu wavelet may be used to improve the fidelity of synthetic seismogram. ·Three practical methods for analysing Yu wavelet parameters are recommended here to facilitate the use of Yu wavelet. It is shown in practice that Yu wavelet has brought good application effect inreal data processing.