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首页> 外文期刊>Frontiers in Physics >Dynamic Wettability Alteration in Immiscible Two-phase Flow in Porous Media: Effect on Transport Properties and Critical Slowing Down
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Dynamic Wettability Alteration in Immiscible Two-phase Flow in Porous Media: Effect on Transport Properties and Critical Slowing Down

机译:多孔介质中不混溶两相流中的动态润湿性变化:对输运性质和临界减速的影响

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The change in contact angles due to the injection of low salinity water or any other wettability altering agent in an oil-rich porous medium is modeled by a network model of disordered pores transporting two immiscible fluids. We introduce a dynamic wettability altering mechanism, where the time dependent wetting property of each pore is determined by the cumulative flow of water through it. Simulations are performed to reach steady-state for different possible alterations in the wetting angle (??). We find that deviation from oil-wet conditions re-mobilizes the stuck clusters and increases the oil fractional flow. However, the rate of increase in the fractional flow depends strongly on ?? and as ?? a?? 90a?| , a critical angle, the system shows critical slowing down which is characterized by two dynamic critical exponents.
机译:通过在富含油的多孔介质中注入低盐度水或任何其他润湿性改变剂而引起的接触角变化,是通过传输两种不混溶流体的无序孔的网络模型进行建模的。我们介绍了一种动态的润湿性改变机制,其中每个孔的时间依赖性润湿性取决于通过它的水的累积流量。对于润湿角(Δθ)的不同可能变化,进行仿真以达到稳态。我们发现偏离油湿条件会重新移动卡住的团簇并增加油分流。但是,分流的增加率很大程度上取决于Δε。并作为 ??一种?? 90a?|临界角,系统显示临界减速,其特征在于两个动态临界指数。

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