包括动态润湿性过渡区的相对渗透率模型
Modeling of relative permeabilities including dynamic wettability transition zones
摘要：
微扰是一种孔隙尺度的性质，它影响流体在多孔介质中的相对运动和分布。存在促使孔隙内的表面经历润湿性变化的储层流体。这种润湿性的变化，反过来，改变了动态的相对渗透率在达西尺度。因此，模拟润湿性变化对相对渗透率的影响对于理解多孔介质中的流体相互作用是至关重要的。在这项研究中，我们包括随时间变化的润湿性的相对渗透率-饱和度关系，通过修改现有的相对渗透率函数。为此，我们假设润湿性变化由基于吸附的模型表示，该模型依赖于暴露时间和化学。然后将此孔隙尺度模型与三角形管模型耦合，以模拟暴露时间相关的相对渗透率数据。模拟数据被用来表征和量化相对渗透率-饱和曲线中的润湿性动态。这项研究进一步表明了在动态变化的多孔介质中准确预测相对渗透率的重要性。
英文摘要：
Wettability is a pore-scale property that impacts the relative movement and distribution of fluids in a porous medium. There are reservoir fluids that provoke the surface within pores to undergo a wettability change. This wettability change, in turn, alters the dynamics of relative permeabilities at the Darcy scale. Thus, modeling the impact of wettability change in relative permeabilities is essential to understand fluids interaction in porous media. In this study, we include time-dependent wettability change into the relative permeability--saturation relation by modifying the existing relative permeability function. To do so, we assume the wettability change is represented by the sorption-based model that is exposure time and chemistry dependent. This pore-scale model is then coupled with a triangular bundle-of-tubes model to simulate exposure time-dependent relative permeabilities data. The simulated data is used to characterize and quantify the wettability dynamics in the relative permeability--saturation curves. This study further shows the importance of accurate prediction of the relative permeability in a dynamically altering porous medium.
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