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本文实现了时间—空间域和频率—波数域的地震波场外推,在时间—空间域实现了65度波动方程有限差分偏移,在频率—波数域实现了只适合地震波速度,仅随深度变化的相移法偏移和适应地震波速度横向变化的分裂步有限差分偏移。
In this paper, the seismic wavefield extrapolation in time-space domain and frequency-wave number domain is realized. The finite difference migration of 65 degree wave equation is realized in the time-space domain. The frequency-wave number domain is only suitable for the seismic wave velocity and only changes with the depth The phase-shift method and the split-step finite-difference migration that adapt to the transverse change of seismic velocity.