利用反射波的相关特性拟合零炮检距剖面——剔除追踪拟合方法

基于射线原理的ＣＤＰ道集，经过动校正以后，相邻道的地震反射波具有波形相似，时间近似相等的特性，如果不具有这种特性，则认为是干扰波或受到了干扰的反射波。根据这一原理，我们可以选择一个有限小的时窗进行剔除追踪拟合，剔除干扰波，得到剔除追踪拟合剖面。从试验结果来看，剔除追踪拟合剖成比水平叠加剖面，多项式拟合剖面，剔除拟合剖面的分辨率、信噪比，同相轴的连续性等都有明显的改善。

Noise-deleted tracing fitting method: fitting a zero-offset section by using the correlativity of seismic reflection wave

After normal moveout correction, the seismic reflection waves of adjacent traces in one CDP trace gather which was formed according to ray principle have similar waveforms and nearly equal arrival times. Without such characteristics,these seismic waves may be considered as noise waves, or the reflection waves that interfere with noises. According to this principle, a finite small time window can be taken to delete seismic noises and then to produce a noise-deleted tracing fitting section. It has been shown that noise-deleted tracing fitting section exhibits better resolution, higher S/N ratio and much improved continuity of seismic event than horizontally stacked section, polynomial fitting section and noise-deleted fitting section.