Ronge-Kutta法在计算复杂构造区域地震波旅行时中的应用

The Applications of Ronge-Kutta Method to Seismic Wave Traveltimes in Complex Structural Model

采用Ronge-Kutta射线追踪法对地震勘探中几个典型地质模型的地震波射线路径和旅行时计算的实例和效果进行分析。将Ronge-Kutta射线追踪模拟的结果与程函方程计算的时距曲线结果进行对比,验证了Ronge-Kutta射线追踪法的易实现性和程函方程有限差分旅行时算法的强稳定性,表明Ronge-Kutta射线追踪法在复杂构造区域进行地震射线路径和旅行时计算时能得到较好的模拟效果。

Calculating travel time of seismic wave is an important part of the fields of seismology and seismic exploration.It is widely used for prestack migration,velocity analysis,seismic tomography,earthquake location,and so on.Analysis of the examples and effects of ray paths and travel times by applying the Ronge-Kutta ray tracing method,and comparing the results of the Ronge-Kutta ray tracing simulations and the effect of hodograph by eikonal equation calculated in several typical geological models of seismic exploration.Simulation results verify the stability of the eikonal equation finitedifference method in the calculation of travel times and the implementation of Ronge-Kutta ray tracing method.The study also shows that the Ronge-Kutta ray tracing method in complex structure region seismic ray paths and travel times calculation gets better simulation results.