In this work, the pore-scale dynamics of immiscible displacement of ScCO₂–brine in a homogeneous pore network is studied using the volume of fluid method. The simulation results are verified with the theoretical equation and literature experimental data. First, the pore-space filling is performed in a unit pore cell having an equal and unequal pore throat for both drainage and spontaneous imbibition. It is observed that the pore-space filling sequence for drainage follows the rules described by the Young-Laplace equation whereas the filling sequence did not follow the rule for spontaneous imbibition. Secondly, the simulation is performed for a homogeneous pore network. It is found that the transverse average volume fraction of ScCO₂ from the simulation matches with the experimental data for intermediate and higher capillary numbers. Further, the present simulation is extended to study the flow regime identification and viscosity ratio and contact angle effects on ScCO₂ volume fraction profile.

中文翻译：

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使用直接数值方法对均匀多孔网络中 ScCO2-盐水不混溶置换的孔隙尺度建模

在这项工作中，使用流体体积法研究了均匀孔隙网络中 ScCO _{2 -}盐水不混溶置换的孔隙尺度动力学。仿真结果与理论方程和文献实验数据进行了验证。首先，孔隙空间填充是在具有相等和不等孔喉的单位孔隙中进行的，用于排水和自吸。可以看出，排水的孔隙空间填充顺序遵循 Young-Laplace 方程描述的规则，而填充顺序不遵循自吸规律。其次，对均匀孔隙网络进行模拟。发现ScCO ₂的横向平均体积分数模拟结果与中等和较高毛细管数的实验数据相匹配。此外，本模拟扩展到研究流态识别和粘度比以及接触角对 ScCO ₂体积分数分布的影响。