剩余递归F-K波动方程偏移

DEVIATION OF RESIDUAL RECURSION F-K WAVEEQUATION

本文首先讨论了常速F-K偏移与垂向变速的相移法偏移的结合而发展的一种F-K域偏移成像技术——递归F-K偏移。该方法在水平展状介质的前提下，偏移精度不受倾角限制且计算时间比相移法大大减少。串联偏移概念的引入，我们给出了递归F-K偏移的一个发展——剩余速归F-K偏移。理论与实际数据处理表明，该偏移方法可进一步提高偏移精度和计算效率。

: This paper discusses a F-K field deviation imaging technique-recursion F-K deviation, which is developed by combination of the normal speed F-K deviation with the deviation of phase-shift method characterized by vertical varying velocity. Under the condition of horizontal layered media, the devia- tion precision of this method is not restricted by the dip angle, and its calcu- lation time is considerably shorter than that of the phase shift method. By introducing the concept of series deviation, We have putforward a new develop- ment of recursion F-K deviation-residual recursion F-K deviation. Theo- retical and practical data processing shows that this deviation method can further raise deviation precision and calculation efficiency.