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脉冲反褶积是以最小相位子波为基础的,脉冲震源激发的地震波就接近这种假设。可控震源激发的地震波是一个扫描信号,将此扫描信号与参考扫描作互相关得到相关记录。理想情况下的相关记录应为克劳德(Klander)子波,它是零相位子波。对相关记录作脉冲反褶积处理后,会引起初至时间的提前,其提前量的大小与子波本身的频率有关。频率越低,周期越大,提前量越大。因此,对可控震源资料做零相位反褶积处理是合适的。本文介绍了零相位反褶积TVDEF模块的实现过程和应用效果。
Pulse deconvolution is based on the smallest phase wavelet, and the seismic wave excited by the pulse source is close to this assumption. The seismic wave excited by a vibroseis is a scanning signal, and the scanning signal is correlated with the reference scanning to obtain the related record. Ideally, the relevant record should be a Klander wavelet, which is a zero-phase wavelet. Pulsed deconvolution of the relevant records, will lead to early arrival time, the size of its advance and wavelet frequency itself. The lower the frequency, the longer the cycle and the larger the advance. Therefore, it is appropriate to do zeroth-phase deconvolution on vibroseis data. This paper introduces the implementation and application of zero phase deconvolution TVDEF module.