摘要
本文利用四参数宽带B样条子波的高分辨性和子波参数调节的灵活性,结合常规匹配追踪算法,实现了高精度的地震道自适应时频分解。应用理论模型,讨论了该方法的正确性和有效性,并与真实谱和Morlet小波匹配追踪做了对比,结果表明该算法计算的时频谱分辨率较高、时频定位性好。实际地震资料的应用效果表明,该方法计算的低频瞬时能量谱剖面可以较好地反映储层的非均质性,能够显现储层内部的细节信息,取得了良好的时频分解效果。
A new time-frequency decomposition method is implemented based on the general matching pursuit in virtue of the high resolution and the parameter-adjustment flexibility of wideband B-spline wavelet with four parameters.This paper discusses the accuracy and validity of the method through theoretic model data.The time-frequency spectrum calculated by this algorithm has higher resolution and better time-frequency localization than that calculated by Morlet wavelet.We apply it to the real seismic data successfully,and the low-frequency energy section calculated by this method can well reflect the reservoir heterogeneity and detail information in the reservoir.
引文
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