摘要:
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。
Abstract:
The existence of multiple waves will reduce the signal to noise ratio of seismic data, and effect quality of seismic data processing and the subsequent geological interpretation accuracy, so the suppression of multiple wave interference is an important work in the processing of seismic data. Author modeled seismic wave field of several typical geological model through using the finite difference method, After NMO correction, then transformed the reflected wave and multiple wave in the t-x domain to the τ-q domain through the method of parabolic Radon transform. Energy convergence is obtained in the τ-q domain, because of the velocity differences between the reflected wave and the multiple wave, the reflection wave and the multiple wave energy were apart from each other in the τ-q domain, so we can get rid of multiple wave energy in the Radon domain and retain the reflected wave information effectively, then reached the suppression of multiple wave effect, improved the signal-to-noise ratio. The suppression of multiple waves were further verified by the results of the parabolic Radon transform of the real seismic data.
百度学术
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