反演法在提高地震资料信噪比中的应用

APPLICATION OF INVERSION METHOD IN IMPROVING SLGNAL-NOISE RATIO OF SEISMIC DATA

t x预测滤波法是噪音衰减的通用且有效的方法 ,但是在噪音背景中存在平行同相轴时将产生假同相轴及出现子波畸变和振幅衰减等现象 ,这是因为噪音的存在影响了滤波器的计算。利用反演法对理论模型和实际数据进行了滤波处理 ,该方法可以有效地消除一般t x预测滤波处理中存在的缺陷。实际应用表明 ,这种方法更能满足对地震资料高分辨率、高信噪比和高保真的要求 ,处理效果更接近实际。

The t-x prediction filtering is a common and effective noise attenuation method. When there are parallel events in noise background, it will produce spurious events, wavelet distortion and amplitude attenuation because the existence of noise can effect the calculation of the filter. The inversion method can overcome the shortcomings of t-x prediction filtering method. It was proved by theoretical and real data processing. This method is favorable for high resolusion, large signal to noise ratio and perfect fidelity.