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子波处理是提高地震资料分辨的一个重要手段 ,该技术的关键是地震子波的估计。根据高阶累积量中保留有信号相位信息的性质 ,给出了一种基于地震信号双谱的子波估计方法。方法突破了以往对地震子波是最小相位的假设 ,适应于任意相位的子波 ,针对不同性质的地震子波 ,进行了理论计算。结果表明 ,这一方法是可行的。同时也显示了信号高阶谱技术在地震资料子波处理 ,提高分辨率方面的潜力。
Wavelet processing is an important means to improve the resolution of seismic data. The key of this technique is the estimation of seismic wavelet. According to the properties of signal phase information retained in high-order cumulants, a wavelet estimation method based on bispectrum of seismic signals is presented. The method breaks the previous hypothesis that the wavelet is the minimum phase of the seismic wave, adapts to the wavelet of arbitrary phase, and carries out the theoretical calculation for seismic wavelet of different properties. The results show that this method is feasible. At the same time, it also shows the potential of signal high-order spectral processing in seismic data wavelet processing to improve the resolution.