基于体素模型的砂岩侵入体三维重建

Sandstone injectite 3D reconstruction based on Voxelization

砂岩侵入体是由沉积后的砂岩再活动并侵入到周围地层中形成的一种特殊砂体。为了研究其演化过程,设计了砂岩侵入体形成过程的模拟实验。针对实验结果,提出了基于体素模型法和Petrel软件的三维重建方法:在实验切片的基础上,对所得到的实验照片进行预处理,将其转化为Petrel软件能够识别的Gslib格式的数据体,再使用克里金插值算法进行模拟。结果表明,克里金算法可以很好地再现砂岩侵入体的外部形态,多组切片的特征参数统计可以定量地刻画出侵入体的形态,以期为实际岩性油气藏中的规模预测提供理论指导。

Sand injectite is one kind of special sand bodies,which injects into surrounding strata af-ter the depositional period.In order to analyze its evolution,a simulation experiment is designed.A 3D re-construction method based on Voxelization is proposed,and Petrel software is used to simulate the results. Based on experiment slices,the slice photos are pre-processed,and then the data is changed into Gslib fromat.Kriging interpolation algorithm is carried out for the data.The simulation results show that Kriging interpolation algorithm can reconstruct the outlines of sand injectites well.Moreover,characteristic param-eters of sand injectites are calculated to depict the shape quantitatively,so that it can provide theoretical models for prediction of lithological reservoir scale.