自动绘制沉积微相图算法设计

成功地给出了沉积微相边缘追踪算法和边缘线生成算法。根据相带连通边界井之间的位置关系 ,将每一口边界井的周围生成的一系列单元控制线连接起来就可以画出沉积边缘线 (相带线 )。单元相带线的形状是由 3个控制点的位置决定的。针对沉积微相图上各种错综复杂的微相叠合及接触关系 ,系统地归纳和设计了 2 0 0多条规则。应用这些规则和算法 ,可以准确地求出相带线的位置。特别是运用控制线单元的生成技术 ,用户通过鼠标在屏幕上拾取控制线单元的控制点就可以实现人机交互功能。同时 ,向量成图技术使得成果图件的复用、修改和再生成为可能。实际应用结果表明 ,计算机自动绘制沉积微相图软件的绘图效果能够满足地质工作的需求。

Algorithms for automatic drawing of microfacies map on computer

The microfacies boundary tracing and drawing algorithms used for making microfacies map automatically were given. Various relationships among the well points with the same or different sedimentary units were analyzed. The contour line of a sedimentary unit can be made by the use of a few elementary control lines. Each elementary control line has three points. The positions of these points can determine the shape of an elementary control line. Because the relationships among different sedimentary units are complicated, more than two hundreds of rules used for making microfacies map are presented. Especially, based on the technology of elementary control lines, the users can interactively modify the contour lines by taking up the control points on elementary control lines. It is possible to reuse or to modify the contour lines with vector line approaches. The program for making microfacies map was developed with visual C++ software. The microfacies maps of 1562 wells made on computer show that the automatically drawing can meet the requirement of geologists.