论文标题
CO $ _2 $存储应用程序中长期润湿性可改变效果的数值研究
Numerical studies of long-term wettability alteration effects in CO$_2$ storage applications
论文作者
论文摘要
多孔培养基中岩石表面的润湿性对控制毛细管压力和相对渗透性的组成性饱和功能有影响。术语的润湿性更改是指随时间推移该属性的变化，例如co $ _2 $与岩石的交互。在这项工作中，我们使用开放的多孔媒体框架在二维含水层含量的系统中进行了两相的两组流量模型，包括两相的两组流程模型，包括时间依赖性的润湿性变化。特别是，我们研究了在含水层忽略的含水层中注射co $ _2 $的空间分布，包括可改变性的效果。数值模拟表明，毛质上的可润滑性改变会导致遏制损失。但是，Co $ _2 $前面进入Caprock的前进非常慢，因为沿垂直迁移路径的未暴露的Caprock也需要通过缓慢的可湿性改变过程来改变。模拟还表明，对含水层的润湿性改变会提高存储效率。这是因为CO $ _2 $前面的迁移速度较慢，并且在润湿性改变后，毛细管入口压力降低。
The wettability of the rock surface in porous media has an effect on the constitutive saturation functions that govern capillary pressure and relative permeability. The term wettability alteration refers to the change of this property over time by processes such as CO$_2$ interactions with the rock. In this work, we perform numerical simulations considering a two-phase two-component flow model including time-dependent wettability alteration in a two-dimensional aquifer-caprock system using the open porous media framework. Particularly, we study the spatial distribution over time of injected CO$_2$ into the aquifer neglecting and including wettability alteration effects. The numerical simulations show that wettability alteration on the caprock results in a loss of containment; however, the CO$_2$ front into the caprock advances very slow since the unexposed caprock along the vertical migration path also needs to be changed by the slow wettability alteration process. The simulations also show that wettability alteration on the aquifer results in an enhancement of storage efficiency; this since the CO$_2$ front migrates more slowly and the capillary entry pressure decreases after wettability alteration.
