Does Rheology of Bingham Fluid Influence Upscaling of Flow through Tight Porous Media?

Non-Newtonian fluids may cause nonlinear seepage even for a single-phase flow. Through digital rock technologies, the upscaling of this non-Darcy flow can be studied; however, requirements scanning resolution and sample size need to clarified very carefully. This work focuses on Bingham fluid in tight porous media by pore-scale simulation CT-scanned microstructures sandstones. A bi-viscous model is used depict fluid. The results show that when flows through sample, flowrate increases at parabolic rate pressure gradient small then linearly with gradient. As result, an effective permeability start-up characterize behavior. By conducting simulations varying sizes, we obtain representative element volume (REV) It found REV almost same as absolute Newtonian interesting result much smaller than permeability. imply size, which large enough reach fluids, investigate well.