Schaefer CE, DiCarlo DA, Blunt MJ
Department of Petroleum Engineering, Stanford University, 367 Panama Street, Room 65, Stanford, California, 94305-2220
J Colloid Interface Sci. 2000 Jan 15;221(2):308-312. doi: 10.1006/jcis.1999.6604.
Water-oil interfacial area in porous media was determined in laboratory experiments using sand columns consisting of either 2 (water and oil) or 3 (water, oil, and air) fluid phases. Surfactant sorption at the water-oil interface was directly measured for a wide range of water, oil, and air saturations undergoing gravity drainage. Differing values of the water-oil interfacial tension were also examined. The Gibbs adsorption equation was then used to obtain values for the water-oil interfacial area. Both 2- and 3-phase water-oil experiments showed a linear increase in interfacial area with decreasing water saturation. Results also showed that interfacial areas were not affected by changes in interfacial tension. The interfacial areas in the 3-phase experiments were less than half the calculated values of the corresponding 2-phase experiments, which contradicts predictions from a conventional pore level analysis of 3-phase flow. Copyright 2000 Academic Press.
在实验室实验中，使用由2种（水和油）或3种（水、油和气）流体相组成的砂柱来测定多孔介质中的水-油界面面积。在重力排水过程中，针对广泛的水、油和气饱和度，直接测量了水-油界面处的表面活性剂吸附量。还研究了不同的水-油界面张力值。然后使用吉布斯吸附方程来获得水-油界面面积的值。两相和三相水-油实验均表明，随着水饱和度的降低，界面面积呈线性增加。结果还表明，界面面积不受界面张力变化的影响。三相实验中的界面面积小于相应两相实验计算值的一半，这与三相流传统孔隙水平分析的预测结果相矛盾。版权所有2000年学术出版社。
