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根据地震旅行时的双平方根方程,采用叠前克希霍夫积分偏移原理,将地震道按产生的散射点,在给定的偏移距范围内抽成道集,称为共散射点道集。然后对该道集进行速度分析、动校正和叠加,得到偏移地震剖面,即共散射点成像。由于共散射点等价于共反射点,而且它具有很高的信噪比,还可以通过它建立准确的速度模型,因此利用共散射点成像,再配合专门的去噪、剩余静校正等处理手段,对于低信噪比地震资料的处理是很有意义的。文中给出的实例证明了该方法的有效性。
According to the double square root equation of seismic travel, the prestack Kirchhoff integral migration principle is adopted, and the seismic traces are generated in a given offset range according to the generated scatter points. . Then the speed set of the road set analysis, dynamic correction and superimposed, get offset seismic section, that is, the total scattering point imaging. Because the co-scattering point is equivalent to the total reflection point, and it has a high signal-to-noise ratio, it can also be used to establish an accurate velocity model, so the use of co-scatter point imaging, coupled with special denoising, residual static correction and other processing Means, for the low SNR seismic data processing is of great significance. The example given in this paper proves the validity of this method.