An analytical model for spontaneous imbibition in fractal porous media including gravity
An analytical model for spontaneous imbibition in fractal porous media including gravity
复制标题
包括重力在内的分形多孔介质中自发渗吸的分析模型
DOI：
10.1016/j.colsurfa.2012.08.047
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发表时间：
2012-11-20
影响因子：
5.2
通讯作者：
You, Lijun
中科院分区：
文献类型：
--
作者：
Cai, Jianchao;Hu, Xiangyun;You, Lijun
润湿液的自发渗吸是裂缝性油藏提高采收率的重要驱动机制，特别是低渗透油藏。基于多孔介质中孔隙的分形特征，推导了一个完整的分析模型，用于表征润湿液体垂直进入气体饱和多孔介质的自发自吸，在整个自吸过程的时间框架内，包括重力。多孔介质中浸润液体的重量是接触面积、孔隙率、孔隙分形维数、弯曲度、最大水力孔径、液体密度、粘度、表面张力和液-固相互作用的函数。分析了影响接近平衡重量时吸胀过程的因素。所提出的分析模型与以前的模型是一致的，预测是在良好的协议与现有的实验数据发表在文献中。(C)2012爱思唯尔有限公司版权所有。
Spontaneous imbibition of wetting liquid into porous media is regarded as a crucially important driving mechanism for enhancing oil recovery from naturally fractured reservoir, especially with low permeability. Based on the fractal character of pores in porous media, a full analytical model for characterizing spontaneous imbibition of wetting liquid vertically into gas-saturated porous media has been derived including gravity over the entire imbibition process time frame. The weight of wetting liquid imbibed into porous media is a function of contact area, porosity, pore fractal dimension, tortuosity, maximum hydraulic pore diameter, liquid density, viscosity, surface tension and liquid-solid interactions. Factors influencing the imbibition process upon approaching equilibrium weight were also analyzed. The proposed analytical model is consistent with the previous models and the predictions are in good agreement with available experimental data published in the literature. (C) 2012 Elsevier B.V. All rights reserved.