| 基于地质大数据与构造语义约束的断层建模 |
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| 引用本文： | 王统,田宜平,罗莹莹,张睿.基于地质大数据与构造语义约束的断层建模[J].地质科技通报,2020,39(4):69-75. |
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| 作者姓名： | 王统 田宜平 罗莹莹 张睿 |
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| 基金项目： | 国家自然科学基金重点项目U1711267贵州省科技计划黔科合支撑[2017]2951贵州省科技计划黔科合支撑[2019]2868贵州省科技计划黔科合支撑[2020]4Y039号贵州省科技计划黔科合平台[2018]5618贵州省地质勘查基金项目2019-02号贵州省地矿局科研项目黔地矿科合[2017]2贵州省地矿局科研项目黔地矿科合[2018]07湖北省创新群体项目2019CFA023 |
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| 摘 要： | 断层作为一种重要的地质构造，在自然界中普遍存在。在地质体三维建模中，断层处理的难点主要在于数据获取不易。如今，在地质大数据条件下，可以利用不同地质语义约束来推测断层的产状。但由于断层构造往往十分复杂，要利用地质大数据对断层构造进行约束建模，需厘清断层的形态分类及其数据模型。通过研究断层的分类，提取出影响断层产状的要素，将这些要素作为断层数据模型的组成部分，在地质大数据挖掘中作为挖掘目标，形成断层地质语义信息表，为后续断层建模提供数据支撑。在此基础上，提出一种新的断层建模思路，即将断层看成一个整体，通过Apriori算法对断层地质语义信息表进行分类，找到每个断层的标准模型。然后，利用断层地质语义信息表对该断层模型进行几何形态约束，形成符合特定地质语义的断层模型。最后，通过断层牵引构造的平滑过渡，将断层镶嵌在已经建好的地层格架模型中，完成断层的三维建模。
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| 关 键 词： | 断层建模 地质大数据 断层语义约束 地质模型切割 |
| 收稿时间： | 2019-11-17 |
Fault modeling based on the semantic constraint of geological big data |
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| Abstract: | Faults, as an important geological structure, are ubiquitous in nature.In 3d modeling of geological body, the difficulty of fault processing lies in obtaining data.Nowadays, under the condition of geological big data, different geological semantic constraints can be used to predict the occurrence of faults.However, as fault structures are often very complex, it is necessary to clarify the morphological classification of faults and their data models in order to use geological big data for constraint modeling of fault structures. This paper studies classification of faults and extracts factors that affect occurrence of faults. These factors are taken as part of fault data model and as mining target in the big data mining of geology. They can constitute table of geological semantic information of faults to provide data support for subsequent fault modeling.On this basis, a new fault modeling idea is proposed, that is, fault is regarded as a whole, and section fault geological semantic information table is classified by Aprirori algorithm to find standard model of each fault. Then, the fault model is constrained by geometric form by using the fault semantic information table to form a fault model with the specific geological semantics. Finally, through smooth transition of the fault traction structure, the fault is embedded in established stratigraphic framework model to complete three-dimensional modeling of the fault. |
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