地质构造的三维可视化

地质构造三维可视化可以将地质勘探数据用直观的图形方式显示,是正确认识地质构造的重要手段,从而为油藏描述提供科学的依据.通过根据已知地质数据的三角剖分和插值,建立了地层层面、断面三角网格模型.研究了地质层面、地质整体模型、地质立体剖切和动态模型等多种三维地质模型可视化流程.提出了建立地质立体模型的方法,即由缝合相邻地层层面、相邻断线分别形成的地质体边界面和断层三角形环状曲面,以及顶地层三角网格层面,共同围成三维地质立体模型.在这一过程中,实现了最近邻优先重构、地层层面三角网格模型的外边界闭合圈多边形追踪及平面与三角网格求交线等关键算法.实验结果提供了从整体到局部的多种地质构造显示手段,从而帮助人们准确快速掌握地质构造.

3 Dimension Visualization for Geology-Constructed-Model

Three dimension visualization of geology\|constructed\|model is used to display the exploration data in graphics methods directly, which is an important means to learn the geo\|body structure better, and provides useful proof for oil simulation. Based on the triangulation and interpolation algorithm, the geology layer and fault triangular grid models are constructed. Then four geology\|constructed\|model visualization methods, geology layer visualization, geology body visualization, geology profile visualization and dynamical geology visualization, are analyzed. The three\|dimension\|geology\|body is constructed by closing surfaces including boundary, faults and top layer. The geology boundary is triangular grids constructed by seaming layers adjacent; the fault surfaces are also triangular grids constructed by seaming fault lines adjacent. Three vital algorithms are implemented, which are the nearest neighbor first piecewise triangular reconstruction, triangular grid surfaces outer polygon boundary tracing and interaction line tracing between triangular grid surfaces and plane. In the end, visualization of various geology\|constructed\|model is given.