复杂介质的三维块状模型快速射线追踪

三维复杂介质的射线追踪,是目前在生产实际中应用最广泛的正演模拟技术。这里采用了块状结构的建模方法构造复杂三维地质体,以试射法作为射线追踪的基本算法。在试射过程中,引入了聚类的基本思想进行聚类加密,提高了射线追踪的效率。为了得到光滑连续的地层曲面,采用基于方位角的平滑处理对曲面进行平滑,可以进一步提高三维射线追踪的计算速度。同时,通过对迭代算法的改进,能够保证复杂模型的快速射线追踪。实际地质模型的射线追踪结果证明,改进后的射线追踪方法能够有效地提高复杂介质三维模型的射线追踪速度。

The rapid ray tracing of complex three-dimensional media

The ray tracing of three-dimensional complex media is the forward simulation technology,being wide application in the practical production nowadays.This paper constructs the complex three-dimensional geological body and interface with the modeling method of block structure and the triangle face,respectively.It uses the test-fire method as the basic arithmetic of the ray tracing to deduce the optimized arithmetic of the ray tracing,speeding up the ray tracing.In the test-fire process,it introduces the basic idea of clustering to increase test-fire density to promote the ray tracing efficiency.In order to obtain the slick and continuous stratum curving face,the constringency precision of the three-dimensional ray tracing is improved by adopting the linear method based on azimuth angle to make the curving face smooth and make sure the rapid ray tracing of the complex modeling.The outcome of the ray tracing of the real geological model proves the improved ray tracing method can enhance the ray tracing speed of complex three-dimensional geological model.