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针对二维复杂速度结构中的射线追踪,给出模型参数和追踪方法。采用该方法,能够精确地描述复杂的二维地质形体及地质构造的分界面特征,并且能够适用于各种复杂地形的情形;对不同的地层或地质体,根据其速度分布特征,采用局部网格化对其进行描述,减小了复杂地质结构在描述速度时计算机所需要的内存量,进一步提高了计算速度。本射线追踪方法不仅可以对复杂模型的反射波及回折波进行追踪,而且可以利用“微折射”方法对目标界面的首波进行追踪。
For ray tracing in 2D complex velocity structure, model parameters and tracking methods are given. This method can accurately describe the complex two-dimensional geological features and geological structure of the interface characteristics, and can be applied to a variety of complex terrain situation; for different strata or geological body, according to its velocity distribution characteristics, the use of local network Geochemical description of it, reducing the amount of memory required by the complex geological structure in describing the speed of the computer, to further improve the computational speed. The ray tracing method can not only track the reflected wave and the return wave of the complex model, but also track the first wave of the target interface by using the method of “micro-refraction”.