Mapping of foam mobility in porous media
Mapping of foam mobility in porous media
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DOI：
10.1016/j.petrol.2006.12.007
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发表时间：
2007-08-01
影响因子：
--
通讯作者：
Zitha, Pacelli L. J.
中科院分区：
文献类型：
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作者：
Nguyen, Quoc P.;Currie, Peter K.;Zitha, Pacelli L. J.
本文报道了利用X射线计算机断层扫描技术对泡沫在颗粒多孔介质中运动的实验研究。实验包括在天然砂岩中共注入氮气和表面活性剂溶液以产生泡沫。当泡沫达到稳态流动状态时，我们用具有高X射线吸收率的示踪气体（氙气）代替一部分氮气。这使我们能够以高空间分辨率绘制出局部泡沫流动性分布。示踪剂浓度的变化率使我们能够分离示踪剂的对流和弥散效应。与目前的看法相反，泡沫流动性分布是不均匀的。并且强烈地依赖于液体和气体的流速。在垂直实验中，泡沫流动性从中心到边界增加。在流动域内，取决于气体和液体流速，捕获的泡沫分数在15%和67%的范围内。泡沫似乎朝向出口的移动的较少，始终是更强的泡沫发展。(c)2007 Elsevier B.V保留所有权利。
We report an experimental study of the motion of foam in granular porous media using X-ray Computed Tomography. The experiments consist of the co-injection of nitrogen and a surfactant solution in natural sandstone to generate foam. When foam reaches the steady-state flow regime, we replace a fraction of nitrogen by a tracer gas with a high X-ray absorbance (Xenon). This enables us to map out the local foam mobility distribution with a high spatial resolution. The rate of change of tracer concentrations enabled us to separate the convection and dispersion effects of the tracer. The foam mobility distribution is non-uniform, contrary to current belief. and depends strongly on the flow rates of liquid and gas. In vertical experiments, foam mobility increases from the center to the boundary. Within the flow domain, the trapped foam fractions range from 15 and 67% depending on gas and liquid flow rates. Foam seems to be less mobile towards the outlet, consistently a stronger foam development. (c) 2007 Elsevier B.V All rights reserved.