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多次波的存在会降低地震资料的信噪比,影响地震资料处理效果和后续的地质解释精度,压制多次波干扰是地震资料处理中的一个重要环节。利用有限差分方法正演模拟几个典型地质模型的地震波场,之后进行动校正,再通过抛物线Radon变换方法把t-x域一次反射波和多次波变换到τ-q域,由于存在速度的差异,Radon域记录中的一次反射波和多次波的能量互相分开,在Radon域对多次波的能量切除,保留反射波的有效信息,达到压制多次波的效果,提高资料的信噪比。通过对实际地震数据进行抛物线Radon变换结果也进一步验证了该方法在压制多次波中的应用效果。
The presence of multiple waves will reduce the signal-to-noise ratio of seismic data, affect the seismic data processing effect and subsequent accuracy of geological interpretation. Suppression of multiple-wave interference is an important link in seismic data processing. The finite difference method is used to simulate the seismic wavefields of several typical geological models, and then the dynamic correction is performed. Then, the primary and secondary wavefields of the tx domain are transformed into the τ-q domain by the parabola Radon transform. Due to the difference in velocity, Radon domain records in a reflected wave and multiple energy are separated from each other in the Radon domain of multiple energy removal, the effective information retained by the reflected wave, to suppress multiples effect, improve the signal to noise ratio of the data. The results of parabolic Radon transform on actual seismic data further verify the application of this method in suppressing multiple waves.