Abstract: For the segmentation and visualization of three-dimensional （3D） oil andgas reservoir, a solution is presented which consists of the following components：A unified data model and interfaces that adapted to a variety of reservoir model files are designed. The second is the oil and gas 3D reservoir model segmentation. The idea of cutting is to divide each face of hexahedral and vertical folding surface into triangles, so that the intersecting lines are calculated by the two triangles intersects algorithm, and then the reservoir section is gotten. This paper briefly describes the compression algorithm of the well trajectories and the method to project the well trajectories on the reservoir section. Finally, the methods of unfold the three-dimensional sections to two-dimensional are discussed. The algorithm is realized by programming and the actual reservoir model data are used to test. The results indicate that the algorithms and process have the advantages of feasibility, flexible and efficient.

Key words: 3D mesh cutting, well trajectory projection, visualization, data compression, oil and gas reservoir

摘要： 针对三维油气藏模型剖切及剖面图可视化，给出了解决方案包括以下部分：设计了适用于多种油藏模型文件的统一数据模型及接口；三维油气藏模型剖切，剖切的思想是将六面体每个面及剖切线所在的面划分为三角形，利用三角形两两相交的算法求取交线段，并形成油藏剖面；简要描述了井轨迹的压缩算法及井轨迹投影到油藏剖面的方法；最后讨论了三维剖面的二维展布方法。算法通过编程实现，并利用实际油气藏模型进行测试，测试结果表明，算法及流程可行性强，并具有灵活、高效等优点。

关键词: 三维网格剖切, 井轨迹投影, 可视化, 数据压缩, 油气储层