在频率-波数域中，详细地推导出了对地震记录进行三维偏移归位的全部计算公式，并给出了能在中小型计算机上实施的程序结构和流程。对该方法的合理性用理论模型进行了试验，并给出了三维理论模型以及三维偏移理论剖面和三维偏移地震记录剖面及其它们的横向切片。通过实际计算以及对二维偏移和三维偏移两者效果的比较，表明三维偏移除了具有高偏移精度和高信噪比之外，而且还有效地压制了侧面波。

Formulas for 3D migration of seismic data in frequency-wave number domain are derived. The software and procedure used on medium-sized computer and minicomputer are given。The rationality of this method is tested by theoretical model, The 3D theoretical model, 3D theoretical migration section, 3D migrated seismic section and their seiscrop sections are presented, The actual computation and the comparison between 2D migration and 3D migration show that 3D migration not only has higher accuracy and higher SjN ratio but also effectively suppresses side waves.