地学应用中的网格数据可视化
发布时间：2018-09-11 12:35
【摘要】：随着地质资源勘探，地质灾害防治，海洋战略等工作的大力开展，国家对于地球物理的研究越来越深入。在国家大力开展实施国家深部探测技术与实验研究专项的背景下，各个高校和科研单位协同合作，共同承担起项目的开发与实施。作为承担地学数据可视化开发，在大规模地学数据下进行图形绘制和可视化平台建设的开发人员，在充分了解了需求，结合国内外同行业发展水平，各方进行调研论证后，决定开发一套专项专用的地学应用的可视化平台。科学计算可视化是通过计算机工具，，把实验获取的大量数据转换成为人的视觉可以直接感受到的计算机图像，由于地学数据抽象复杂，对地学数据转化成可视的图形后，对于地学专家能很方便通过交互操作进行分析研究。 本文针对项目中承担的工作进行了深入的研究和分析，对项目所要求的二维Mesh网格可视化进行广泛的探讨，其中二维Mesh网格是一种简单的结构网格，能非常直观的显示各种地学数据，其中等值线就是网格显示数据中最常用的一种表达形式，本文制定出可行的方案，对网格中等值线的绘制给出了完善的解决方法。同时本文对三维Mesh网格的等值面可视化也进行了初步的讨论，由于三维Mesh网格的复杂性，本文对各种可能出现的情况进行了归纳，提出了一套可行的可视化方案。 本文对项目中对断层的需求展开论述，并应用到角点网格这一模型，角点网格是一种结构化网格，这种网格中每个网格单元都有自己独立的八个顶点，这种网格的好处就在于能很好的对地学断层进行描述。本文对角点网格展开来进行详细的介绍和广泛的讨论，对角点网格中断层的获取进行研究，对断层面的可视化进行说明。对于大规模地学数据的载入，我们要兼顾速度和质量，所以我们应用到直角网格。直角网格是一种非常基础的网格类型，这种网格绘制速度非常快，但是效果一般，尤其是对断层不能很好的表达。本文把直角网格和角点网格结合起来，建立混合网格模型，在断层附近使用角点网格，在远离断层的区域使用直角网格。这是一种混合化的非结构模型，因为都是六面体网格，在拓扑结构上差异不大，容易结合。在对断层的表达上与全使用角点网格时没有差别，但是在非断层区域使用的简单结构化网格会大大的减少计算和存储，提高绘制的速度。最后，本文还对PEBI网格进行了简单的研究，PEBI网格是用于油藏模拟的一种网格，对于PEBI网格的绘制，我们对三角网格和Voronoi图的生成给出了方法，并最后进行了裁剪。
[Abstract]:With the development of geological resources exploration, geological disaster prevention, marine strategy and so on, the research on geophysics is getting deeper and deeper. Under the background of the implementation of the national deep exploration technology and experimental research project, various universities and scientific research institutions cooperate to jointly undertake the development and implementation of the project. As a developer who undertakes the visualization development of geoscience data and builds a graphic drawing and visualization platform under large-scale geoscience data, after fully understanding the requirements and combining the development level of the same industry at home and abroad, all parties carry out investigation and demonstration. Decided to develop a special set of special geoscience application visualization platform. Visualization of scientific computation is to convert a large number of experimental data into computer images that can be directly felt by human vision through computer tools. Because of the complex abstraction of geoscience data, the geoscience data is transformed into visual graphics. It is convenient for geoscientists to analyze and study by interactive operation. In this paper, the work undertaken in the project has been deeply studied and analyzed, and the visualization of two-dimensional Mesh grid required by the project has been extensively discussed. Among them, two-dimensional Mesh grid is a simple structural grid. It can display all kinds of geoscientific data intuitively, and the isoline is one of the most commonly used expression forms in the grid display data. In this paper, a feasible scheme has been worked out, and a perfect solution to the drawing of the contour line in the grid has been given. At the same time, the visualization of isosurface of 3D Mesh mesh is also discussed in this paper. Due to the complexity of 3D Mesh mesh, various possible situations are summarized and a set of feasible visualization scheme is put forward. In this paper, the requirements for faults in the project are discussed and applied to the model of corner grid, which is a structured grid in which each grid cell has its own eight vertices. The advantage of this grid is that it can describe geoscientific faults well. This paper introduces and discusses the corner grid in detail, studies the acquisition of the interruption layer of the corner grid, and explains the visualization of the fault level. For large scale data loading, we have to consider both speed and quality, so we apply it to rectangular grids. Cartesian mesh is a very basic mesh type. The grid rendering speed is very fast, but the effect is general, especially the fault can not be well expressed. In this paper, a hybrid grid model is established by combining the right angle grid with the corner grid. The corner grid is used near the fault and the right angle grid is used in the area far away from the fault. This is a hybrid unstructured model, because it is a hexahedron mesh, which has little difference in topology and is easy to combine. There is no difference between the expression of fault and the full use of corner grid, but the simple structured grid used in non-fault area will greatly reduce the computation and storage, and improve the speed of rendering. In the end, the PEBI grid is a kind of grid used in reservoir simulation. For the drawing of PEBI mesh, we give a method to generate triangular grid and Voronoi diagram, and finally we cut it out.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;TP391.41
[Abstract]:With the development of geological resources exploration, geological disaster prevention, marine strategy and so on, the research on geophysics is getting deeper and deeper. Under the background of the implementation of the national deep exploration technology and experimental research project, various universities and scientific research institutions cooperate to jointly undertake the development and implementation of the project. As a developer who undertakes the visualization development of geoscience data and builds a graphic drawing and visualization platform under large-scale geoscience data, after fully understanding the requirements and combining the development level of the same industry at home and abroad, all parties carry out investigation and demonstration. Decided to develop a special set of special geoscience application visualization platform. Visualization of scientific computation is to convert a large number of experimental data into computer images that can be directly felt by human vision through computer tools. Because of the complex abstraction of geoscience data, the geoscience data is transformed into visual graphics. It is convenient for geoscientists to analyze and study by interactive operation. In this paper, the work undertaken in the project has been deeply studied and analyzed, and the visualization of two-dimensional Mesh grid required by the project has been extensively discussed. Among them, two-dimensional Mesh grid is a simple structural grid. It can display all kinds of geoscientific data intuitively, and the isoline is one of the most commonly used expression forms in the grid display data. In this paper, a feasible scheme has been worked out, and a perfect solution to the drawing of the contour line in the grid has been given. At the same time, the visualization of isosurface of 3D Mesh mesh is also discussed in this paper. Due to the complexity of 3D Mesh mesh, various possible situations are summarized and a set of feasible visualization scheme is put forward. In this paper, the requirements for faults in the project are discussed and applied to the model of corner grid, which is a structured grid in which each grid cell has its own eight vertices. The advantage of this grid is that it can describe geoscientific faults well. This paper introduces and discusses the corner grid in detail, studies the acquisition of the interruption layer of the corner grid, and explains the visualization of the fault level. For large scale data loading, we have to consider both speed and quality, so we apply it to rectangular grids. Cartesian mesh is a very basic mesh type. The grid rendering speed is very fast, but the effect is general, especially the fault can not be well expressed. In this paper, a hybrid grid model is established by combining the right angle grid with the corner grid. The corner grid is used near the fault and the right angle grid is used in the area far away from the fault. This is a hybrid unstructured model, because it is a hexahedron mesh, which has little difference in topology and is easy to combine. There is no difference between the expression of fault and the full use of corner grid, but the simple structured grid used in non-fault area will greatly reduce the computation and storage, and improve the speed of rendering. In the end, the PEBI grid is a kind of grid used in reservoir simulation. For the drawing of PEBI mesh, we give a method to generate triangular grid and Voronoi diagram, and finally we cut it out.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P208;TP391.41
【参考文献】
中国期刊全文数据库 前6条
1 武强,徐华;三维地质建模与可视化方法研究[J];中国科学(D辑:地球科学);2004年01期
2 曾闽山;侯岩松;;海量地震数据网格化算法分析与研究[J];石油天然气学报(江汉石油学院学报);2006年02期
3 韩峻;施法中;吴胜和;范峥;;基于格架模型的角点网格生成算法[J];计算机工程;2008年04期
4 毛小平;张志庭;钱真;;用角点网格模型表达地质模型的剖析及在油气成藏过程模拟中的应用[J];地质学刊;2012年03期
5 孙桂茹,马亮,路登平,赵国瑞,郝嘉林;等值线生成与图形填充算法[J];天津大学学报;2000年06期
6 戴常英,李昕,李凌博;等值线图区域填充的边界扫描算法[J];微机发展;2004年01期
中国博士学位论文全文数据库 前1条
1 g氖
本文编号：2236704
本文链接：https://www.wllwen.com/kejilunwen/dizhicehuilunwen/2236704.html
