In the initial recovery stage, only 5 to 15% of hydrocarbons can be extracted from oil reservoirs, so it is necessary to supply energy from an external reservoir or to use advanced solutions to increase oil recovery. By using secondary recovery method and flooding, greater amount of oil can be extracted. In this study, a new procedure of flooding using nanofluid was simulated. The nanofluid and source rock were modeled as a single phase and heterogeneous porous media, respectively. The geometry was considered as a two-dimensional rectangular area. Two phase Darcy equations and mass transfer equations were utilized to simulate this process. Moreover, the effects of different volume fractions of the nanofluid, the reservoir porosity, and absolute diffusion were studied. Considering the heterogeneous media, absolute diffusion is an important mechanism. Capillary pressure and permeability play an important role in the two phase Darcy equations. Furthermore, the effects of mechanical properties of inlet fluid such as viscosity and density on oil recovery factor were investigated. According to the results, it is possible to increase the oil recovery factor of the reservoir rock as a randomized heterogeneous porous environment more than 15% by adding 5% of the silicon nanoparticle to the fluid.

在初始采收阶段，只能从储油层中抽出5％至15％的碳氢化合物，因此有必要从外部储层提供能量或使用先进的解决方案来提高采油量。通过使用二次采油方法和驱油，可以提取更多的石油。在这项研究中，模拟了一种使用纳米流体驱油的新程序。将纳米流体和烃源岩分别建模为单相和非均质多孔介质。该几何形状被认为是二维矩形区域。利用两相达西方程和传质方程来模拟该过程。此外，研究了纳米流体的不同体积分数，储层孔隙率和绝对扩散的影响。考虑到异构媒体，绝对扩散是重要的机制。毛细压力和渗透率在两相Darcy方程中起重要作用。此外，研究了入口流体的机械性能（如粘度和密度）对采油率的影响。根据该结果，通过向流体中添加5％的硅纳米颗粒，可以使作为随机化的非均质多孔环境的储层岩石的采油率超过15％。