PREDICTION OF RELATIVE PERMEABILITY IN SIMPLE POROUS-MEDIA
PREDICTION OF RELATIVE PERMEABILITY IN SIMPLE POROUS-MEDIA
复制标题
DOI：
10.1103/physreva.46.2004
复制
发表时间：
1992-08-15
影响因子：
2.9
通讯作者：
BLUNT, M
中科院分区：
文献类型：
--
作者：
BRYANT, S;BLUNT, M
本文提出了一种预测计算颗粒多孔介质中两相相对渗透率的方法。已经测量了包中每个球体的空间坐标，从而能够完全确定介质的微观结构。从这些数据中，我们提取一个网络模型，复制孔隙空间。通过压实填料或膨胀单个球体，我们可以生成具有不同孔隙率的模型多孔介质，其微观结构也完全确定。我们模拟粘性和毛细作用为主的非润湿性流体的入侵到润湿性流体包含在这些介质中。在侵入过程中，我们计算每个相的平均水力传导率，以获得作为流体饱和度的函数的相对渗透率。由于微观结构是已知的，计算不涉及任何可调参数或孔结构的补充测量。计算出的相对渗透率成功地与实验值相比，以前测量的砂包装，珠包，和一个简单的砂岩。
We present a predictive calculation of two-phase relative permeabilities in granular porous media formed from a dense random packing of equal spheres. The spatial coordinates of every sphere in the pack have been measured, enabling the microstructure of the medium to be completely determined. From these data we extract a network model that replicates the pore space. By compacting the packing or swelling individual spheres, we may generate model porous media of different porosities whose microstructure is also completely determined. We simulate both viscous- and capillary-dominated invasion of a nonwetting fluid into a wetting fluid contained in these media. During invasion we calculate the average hydraulic conductance of each phase to obtain the relative permeabilities as a function of fluid saturation. Because the microstructure is known, the calculations do not involve any adjustable parameters or supplementary measurements of pore structure. The computed relative permeabilities are successfully compared with experimental values previously measured on sand packs, bead packs, and a simple sandstone.