Clarifying the confined liquid flow in nanoscale porous media is crucial for many science and engineering applications, such as shale/tight oil recovery. However, most of the investigations are focused on the single pore and the uniform wet, and there are few effective nanoscale pore-scale simulation methods. In this paper, we comprehensively study the confined water flow in shale porous media from the theoretical analysis to a new nanoscale lattice Boltzmann method (LBM). The nanoscale effects of the slip boundary and the varying interfacial water viscosity caused by the solid-liquid molecular interactions are considered. Additionally, the water flowing in shale porous media coupling different transport mechanisms in the water-wetting inorganic and oil-wetting organic media is simulated and discussed. The results show that the water flow behaviors obtained by (LB) simulations fit well with that calculated by the theoretical analysis. Then, the controllable nanoscale effects are successfully brought into LB simulation. Additionally, the nanoscale effects of the slip boundary and the interfacial fluid viscosity have a great impact on the water flow capacity, and the confined water flow behaviors are sensitive to heterogeneous wettability and pore size.

澄清纳米级多孔介质中的受限液体流对于许多科学和工程应用（例如页岩/致密油采收）至关重要。然而，大多数研究集中在单一孔隙和均匀湿润上，很少有有效的纳米尺度孔隙尺度模拟方法。在本文中，我们从理论分析到新的纳米级格子玻尔兹曼方法（LBM），全面研究了页岩多孔介质中的承压水流。考虑了滑移边界的纳米级效应和固液分子相互作用引起的界面水粘度的变化。此外，模拟和讨论了在页岩多孔介质中流动的水，这些介质耦合了在水润湿的无机介质和油润湿的有机介质中的不同传输机制。结果表明，通过（LB）模拟获得的水流行为与理论分析计算的水流行为非常吻合。然后，可控的纳米级效应成功地引入了LB模拟。另外，滑移边界和界面流体粘度的纳米尺度效应对水的流动能力有很大的影响，并且受限的水流动行为对非均质的润湿性和孔径敏感。