拟合零炮检距剖面与分辨率

水平叠加虽是当前地震数据处理中的标准工作方法，但其一些固有的缺陷不容忽视，特别是以信号高频成分的显著损害。１９８７年我们提出的零炮检距拟合方法在振幅保真和抗动校正拉伸方面均优于水平叠加，本文再从高分辨率的角度来阐明此方法的另一些特性。当存在剩余动校正时差时，此法比叠加有更好的高频响应；对于动校正位伸引起的高频损失，也有较好的补偿作用，另外，叠加改善信噪比的能力随频率增高而减弱，而此法则不受频率影响

Fitted zero-offset section and resolution

Although horizontal stacking is a standard technique in seismic data processing,we can not ignore its intrinsic deficiencies,particularly the obvious damage of high-frequency signals. Our zero-offset fitting method advanced in 1987 is superior to the horizontal stacking in both amplitude fidelity and resistance of NMO correction lengthening. As for high resolution,we expound other characteristics of this method.When there exist residual normal moveouts,this method results in better highfrequency responses and better compensation of high-frequency content loss due to NMO correction lengthening than the stacking does. Signal-noise ratio improvement of the stacking decreases with the increase of frequency, but this method brings higher signal-noise ratio of high-frequency contents because it is not limited in frequency. The stacking removes long-path multiples effectively ;but it fails to remove short-path multiples,which damage resolution considerably This method does not attenuate all multiples on the whole,which offers a favourable condition to eliminate all multiples.