煤层气数值试井非结构网格生成方法研究

Research on Unstructured Grid Generation for CBM Numerical Well Testing

分析了数值试井中的非结构网格的生成方法,利用Delaunay三角剖分的优良特性,设计了"翼边"数据结构,实现了满足数值计算前处理要求的Delaunay网格生成算法,并对网格质量进行了控制。实例表明,生成的网格具有边界约束一致性和较好的质量,可以满足煤层气数值试井计算的要求。

This paper analyzes the unstructured grid generation methods in numerical well testing.The 'winged edge' data structure is designed by using the good characteristics of Delaunay triangulation.The constrained Delaunay triangulation algorithm with good mesh quality is achieved.Examples show that the resulting grid with boundary constraint consistency and better quality,which can meet the requirements of CBM computing numerical well testing.