少道叠加在海上高分辨率地震资料处理中的应用

受原始记录远道频率低于近道频率、动校拉伸、速度误差等因素的影响 ,满覆盖叠加降低了地震剖面的分辨率。文中讨论了少道叠加方法 ,对少道叠加和满覆盖叠加的结果做了分析和对比 ,认为少道叠加既可以保护高频信息 ,又可以压制随机噪音。少道叠加技术的关键在于消除叠前道集中的随机噪音和多次波 ,提高叠前资料信噪比。少道叠加技术在实际资料处理中见到了明显的效果。

AN APPLICATION OF NEAR OFFSET STACK IN PROCESSING OFFSHORE SEISMIC DATA WITH HIGH RESOLUTION

Full offset stack may reduce seismic resolution,because of lower frequency of far offset than that of near offset in raw seismic data,NMO stretching and velocity error. Therefore this paper will discuss a method of near offset stack and compare its results with those of full offset stack,indicating that near offset stack can preserve high frequency and suppress random noise. A key of near offset stack is eliminating noise and multiples in prestack gather in order to improve signal/noise ratio of prestack data. Near offset stack has proven effective in actual data processing