论文部分内容阅读
在地震记录中的同-CDP道集内，有效波与干扰波在视速度、频率和振幅方面存在差异，主要表现为相邻地震记录道的相似性及振幅级别的变化。因此，应该设法选择相关性最好、振幅差值最小及振幅平均值适中的地震记录道进行盈前同相叠加，以消除地震叠加剖面中存在的局部干扰，减少非相干记录道对有致信号的干涉，使叠加效应最佳；同时计算某一时刻记录的振幅平均值，并根据其大小对CDP道集中记录道的野值进行剔除，从而提高地震剖面的信噪比，减少们移“画弧”现象。实际资料应用表明，该方法不仅能减少倍移“画弧”现象，而且在消除特殊的多次波方面也有明显效果。
In the same-CDP gathers of seismograms, there are differences in apparent velocities, frequencies and amplitudes between the effective and interfering waves, mainly due to the similarities and amplitudes of adjacent seismic traces. Therefore, we should try to choose the best co-occurrence of seismic traces with the best correlation, the smallest amplitude difference and the moderate average amplitude to eliminate the local interference existing in the seismic superimposed profile and reduce the interference caused by incoherent signals , So that the superposition effect of the best; at the same time calculate the average amplitude of a record at a time, and according to its size on the track of CDP Road to remove the outliers to improve the seismic profile of the signal to noise ratio to reduce the shift “painting arc” phenomenon. The actual data application shows that this method can not only reduce the “draw arc” phenomenon, but also eliminate the special multiples.