path of seismic wave 地震波路径
But to layered strata, the seismic wave path is complicated when reservoir changes, and it is difficult to directly define vertical time difference by pre stack far offset seismic data.
对于层状介质，油藏变化前后的地震波传播路经比较复杂，其激发点和接受点发生了变化，要想用叠前远偏移距数据直接计算垂直时差比较困难。
The problem of the seismic wave travel path in the nonhomogeneous medium is often mentioned in seismic sequence analysis by means of rapid ray tracing.
在地震层析研究中，常常涉及地震波在非均匀介质中的传播路径问题，故快速射线追踪是不可缺少的工具。
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