含正断层的三维地层面网格生成算法

Algorithm for 3D grid generating of stratum-surface containing normal faults

断层会导致地层面不连续,现有方法不能很好地生成三维地层面网格.在建立地层面水平规则三角网格、嵌入断层线的基础上,引入了地层面分区的思想,把地层面网格分割成若干高程连续的封闭分区,计算落入各分区的等高线,再以分区为独立单位,计算网格顶点高程,最后计算断层面内部顶点的高程.实验表明,算法充分考虑了断层情况,建模结果正确合理.

Because of the discontinuity of stratum-surface caused by fault,3 Dgrid of it cannot be generated correctly by current relative methods.On the basis of the constructed horizontal regular triangular-mesh and the embedded fault lines for stratum-surface,the concept of partition for stratum-surface was introduced,and the stratum-surface mesh was divided into several continuous close partitions,contours belonging to each partition were acquired respectively,then the elevation of each mesh vertex was calculated in every independent partition,and finally the elevation of each interior vertex of fault-surface was computed.Experiments showed that faults were fully considered in the algorithm and the results were correct and reasonable.