Wave equation time migration fails to image subsurface geological structure correctly in the case of obvious lateral seismic velocity variation.
当介质的速度在横向上存在较大的变化时，波动方程时间偏移不能使地下的构造正确成像。
The velocity points at the part where geological structure is complicated should be appropriately densified in order to picture the lateral variation of velocity.
合成平均速度点的疏密主要由作图比例尺而定，在构造复杂的部位应适当地加密，以便控制速度的横向变化。
The tomographic inversion of seismic data is better shown in the Talimu Basin and it revealed obvious lateral velocity variation in shallow levels.
通过对塔里木盆地地震资料的层析反演取得了较好的结果，揭示了浅部地震速度具有较大的横向变化。
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