Relative permeability from tomographic images; effect of correlated heterogeneity
Relative permeability from tomographic images; effect of correlated heterogeneity
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DOI：
10.1016/s0920-4105(03)00066-4
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发表时间：
2003-09-01
影响因子：
--
通讯作者：
Pinczewski, WV
中科院分区：
文献类型：
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作者：
Arns, JY;Arns, CH;Pinczewski, WV
我们研究的相对渗透率和剩余饱和度的计算，使用来自枫丹白露砂岩的层析成像图像的网络，以前用于成功地计算单相输运特性。与电导率和渗透率计算相反，我们发现，计算出的相对渗透率和剩余饱和度的样品相同的砂岩显示出高度的可变性。随机化孔隙和喉道以去除所有相关性几乎完全消除了样品之间的可变性，并产生平滑的数值数据集。我们的结论是，在岩石微观结构的相关性，这似乎对单一流体性质的计算影响不大，计算的相对渗透率和残余饱和度有重大影响。(C)2003 Elsevier Science B.V.保留所有权利。
We examine the calculation of relative permeability and residual saturation using networks derived from tomographic images of Fontainebleau sandstone previously used to successfully calculate single-phase transport properties. In contrast to electrical conductivity and permeability calculations, we find that that computed relative permeabilities and residual saturations for samples of the same sandstone display a high degree of variability. Randomizing pores and throats to remove all correlations almost completely eliminates the variability between samples and produces smooth numerical data sets. We conclude that correlations in rock microstructure, which appear to have little effect on the calculation of single fluid properties, have a major effect on computed relative permeability and residual saturation. (C) 2003 Elsevier Science B.V. All rights reserved.