用相位移加实现速度纵横向变化、复杂陡倾地质模型的正流模拟，为复杂波场的地震、地质解释提供了精确、实用的方法。一般情况下，相位移延拓方法对徒倾斜地层成像精度高、稳定性好、计算快，但实现速度的横向变化困难；而频率、空间域的有限差分法算法简单、稳定性好、能适应速度的纵横向任意变化，但偏移陡断地层存在很多问题-Using phase shift and realization of vertical velocity variations, complex flow simulation of steep dip geological model, seismic and geological interpretation of complex wave field provides accurate and practical way. Under normal circumstances, phase displacement extrapolation method for imaging of tilted strata of high precision, stability, quick calculation, but difficulties of lateral velocity variations, and frequency and spatial domain algorithm of finite difference methods for simple, good stability, can adapt to the speed of longitudinal and lateral variation, but offset steep faulted strata there are many problems