The impact of porous media heterogeneity on non-Darcy flow behaviour from pore-scale simulation
The impact of porous media heterogeneity on non-Darcy flow behaviour from pore-scale simulation
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DOI：
10.1016/j.advwatres.2015.05.019
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发表时间：
2016-09-01
影响因子：
4.7
通讯作者：
Bijeljic, Branko
中科院分区：
文献类型：
--
作者：
Muljadi, Bagus P.;Blunt, Martin J.;Bijeljic, Branko
孔隙尺度的非均质性对非达西流动行为的影响进行了研究，通过直接流动模拟的3-D图像的beadpack，Bentheimer砂岩和Estaillades碳酸盐。表明Estaillades碳酸盐岩中蠕动达西流态停止的临界雷诺数比Bentheimer砂岩中的小两个数量级，比珠粒包中的小三个数量级。从流场特征的检查中可以推断，Estaillades孔隙空间中在流体速度升高时出现的稳定涡流是早期从达西流态转变的原因。的非达西系数β，非达西流的发病，和达西渗透率为所有样品的获得和比较，现有的实验数据表明我们的方法的预测能力。X射线成像沿着流动的直接孔隙尺度模拟为预测非达西流动参数（例如β因子和非达西流动的开始）提供了实验和经验相关性的可行替代方案。(C)2015年，作者。爱思唯尔有限公司出版
The effect of pore-scale heterogeneity on non-Darcy flow behaviour is investigated by means of direct flow simulations on 3-D images of a beadpack, Bentheimer sandstone and Estaillades carbonate. The critical Reynolds number indicating the cessation of the creeping Darcy flow regime in Estaillades carbonate is two orders of magnitude smaller than in Bentheimer sandstone, and is three orders of magnitude smaller than in the beadpack. It is inferred from the examination of flow field features that the emergence of steady eddies in pore space of Estaillades at elevated fluid velocities accounts for the early transition away from the Darcy flow regime. The non-Darcy coefficient beta, the onset of non-Darcy flow, and the Darcy permeability for all samples are obtained and compared to available experimental data demonstrating the predictive capability of our approach. X-ray imaging along with direct pore-scale simulation of flow provides a viable alternative to experiments and empirical correlations for predicting non-Darcy flow parameters such as the beta factor, and the onset of non-Darcy flow. (C) 2015 The Authors. Published by Elsevier Ltd.