Interfacial phenomena in shale reservoirs: Molecular insights into adsorption, wettability, and nanoconfined flow

over methane. Wettability, governed by fluid-solid interactions, varies significantly across mineral surfaces and is modulated by factors such as surface functionalization, ion presence, and pressure conditions. Nanoconfined fluid flow exhibits slip behaviors, viscosity variations, and complex multiphase dynamics that depend on interfacial properties and pore geometry. This work provides fundamental mechanistic insights into the nanoscale interfacial phenomena governing fluid behaviors in shale reservoirs. These insights deepen the understanding of complex fluid occurrence and dynamics in heterogeneous porous media and offer theoretical guidance for the optimized design of energy extraction and carbon management strategies in shale systems.