多点地质统计学在三维岩心孔隙分布建模中的应用

介绍多点地质统计学及其用于三维岩心孔隙结构建模的原理和方法。基于多点地质统计方法,以均质性较好的Fontaineblean砂岩的二维薄片为基础,重构三维孔隙结构模型,并且应用局部孔隙度理论和渗流概率函数进行准确性评价。结果表明:由此获取的孔隙结构模型与真实三维岩心孔隙分布十分相近,且具有相似的均质性和孔隙连通性;重构的三维孔隙结构模型不仅可以用来表征真实岩心的孔隙连通性和均质性,而且也可以作为其他物理特性模拟的基础。

Application of multiple-point geostatistics in 3D pore structure model reconstruction

Multiple-point geostatistics and its principle and methods of building 3D distribution of core pore structure were presented.The 3D pore structure model was reconstructed using multiple-point geostatistical methods on the basis of 2D thin sections of Fontaineblean sandstone,and the accuracy of this method was evaluated by calculating local porosity distribution function and average percolation probability function in real 3D digital cores and the reconstructed digital cores.The results show that the characteristics of pore structures reconstructed by this method are similar to those of real 3D digital cores,and also have similar homogeneity and strong pore connectivity.The reconstruction of 3D pore structure model can be used to characterize the pore connectivity and homogeneity of the real core,but also can be used as the basis for simulation of other physical characteristics.