Extended GOSIM: MPS‐Driven Simulation of 3D Geological Structure Using 2D Cross‐Sections
Extended GOSIM: MPS‐Driven Simulation of 3D Geological Structure Using 2D Cross‐Sections
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DOI：
10.1029/2021ea001801
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发表时间：
2022-05
影响因子：
3.1
通讯作者：
Weisheng Hou;Hengguang Liu;Tiancheng Zheng;Hui Chang;Fan Xiao
中科院分区：
文献类型：
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作者：
Weisheng Hou;Hengguang Liu;Tiancheng Zheng;Hui Chang;Fan Xiao
在过去的二十年中，多点统计（MPS）算法已经应用于许多领域。然而，3D训练数据或数据（TD）难以获得。由钻孔或地球物理资料得到的二维地质剖面图通常用于解释地质现象，其可靠性较高，且相对容易获取。在这项研究中，提出了一种结合顺序处理和全局优化的分步算法。在预先设置模拟参数后，从每个比例下的二维截面扩展出三维TD集和相应的图案数据库是关键步骤之一。接下来的步骤是用模式数据库在粗尺度上构建初始模型。实现迭代期望最大值（EM-like）优化过程以获得最终实现。每一次迭代都采用多尺度策略进行。区域地质构造的模拟实例表明，该方法可以合理地保持和再现地层序列。通过计算晶粒比例、分形维数和两点连通概率函数曲线，验证了微观组织模型的随机性和有效性。
In the past two decades, algorithms for multiple‐point statistics (MPS) have been applied in many fields. However, 3D training datum or data (TD) is difficult to be obtained. Two‐dimensional geological cross‐sections from boreholes or geophysical data with high reliability are usually used to explain geological phenomena and are relatively easier to be acquired. In this study, a step‐wise algorithm that combines sequential process and global optimization is presented. Constructing 3D TD set and corresponding pattern databases that extended from 2D cross‐sections at each scale is one of the key steps after presetting the simulation parameters. The following step is constructing an initial model at the coarsest scale with the pattern databases. The iterative Expectation Maximum‐like (EM‐like) optimization process is implemented to obtain the final realization. Each iteration is conducted with a multiscale strategy. Simulation examples of the regional geological structures show that the stratigraphic sequence can be reasonably kept and reproduced. Also, the randomness and effectiveness of the microstructure model are verified by calculating the proportion of grains, fractal dimension and the curve of two‐point connectivity probability function.