Interfacial Slip Effects on Seismic Wave Dispersion and Attenuation in Tight Rocks

Summary Interfacial slip at fluid–solid boundaries can significantly modify hydraulic transport in tight porous media, yet its implications for representative wave-induced fluid-flow mechanisms have not been systematically investigated. In this study, we develop a physically explicit multiscale poroelastic framework to investigate how pore-scale interfacial slip propagates through representative poroelastic relaxation mechanisms. Starting from oscillatory viscous flow in a cylindrical pore with interfacial slip boundary conditions, we derive a slip-modified pore-scale transport model that provides a physically explicit realization of hydraulic transport under slip conditions. Rather than introducing a new wave-induced attenuation mechanism, the derived transport model is consistently incorporated into the Biot, Biot–squirt, and White–squirt formulations to systematically examine how the same pore-scale transport modification influences viscous flow, squirt-flow relaxation, and mesoscopic pressure diffusion. The results show that interfacial slip systematically reduces viscous resistance, enhances dynamic permeability, and primarily manifests as a shift of the characteristic frequencies governing wave-induced fluid flow. Although the same transport modification is introduced into each model, its macroscopic manifestation depends on the governing relaxation mechanism, leading to distinct responses in the Biot, Biot–squirt, and White–squirt frameworks. Comparisons with laboratory measurements on tight carbonate samples demonstrate that the proposed framework reproduces the principal trends of seismic dispersion and attenuation while maintaining physically reasonable model parameters. These results establish a physically explicit connection between pore-scale interfacial transport and multiscale seismic wave propagation, providing a physically consistent basis for incorporating interfacial effects into poroelastic wave-propagation models and for improving the interpretation of seismic responses in tight porous media.