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三维地层模型的精度直接影响其应用价值,利用多元数据耦合建模是提高模型精度的重要策略。在分析影响三维地层模型精度因素的基础上,以钻井数据和地质平面数据耦合建模为例,研究了在构建地层界面时两类数据之间偏差的自动检测及修正方法,该方法主要应用了GIS空间探索性分析技术及钻井影响域技术,其基本的思路为:提取一地层面的钻井数据和地质平面数据,合并后建立Voronoi图;利用分配给Voronoi图中每一单元的熵值或聚类属性,检测钻井数据相对于地质平面数据的偏差情况,提取存在较大偏差的钻井;利用钻井影响域技术对地质平面数据有针对地进行局部修正。测试结果表明,该技术能够实现多元地层建模数据的一致性处理,效率高、结果相对可靠。
The accuracy of three-dimensional stratum model directly affects its application value. The use of multiple data coupling modeling is an important strategy to improve the accuracy of the model. Based on the analysis of the factors influencing the accuracy of the 3D formation model, taking the coupled modeling of the drilling data and the geological plane data as an example, the automatic detection and correction method of the deviation between the two types of data when constructing the formation interface is studied. The method is mainly applied GIS spatial exploratory analysis technology and drilling influence domain technology, the basic idea is: to extract a well-formation of the drilling data and geological plane data, the merger to establish Voronoi diagram; use of each unit assigned to the Voronoi diagram of the entropy value or poly Class attribute, detect the deviation of the drilling data from the geological plane data, and extract the wells with large deviations; and use the drilling influence area technique to locally correct the geological plane data. The test results show that this technique can achieve consistent processing of multi-stratum modeling data with high efficiency and relatively reliable result.