Multiscale computational models for simulating multi-phase fluid flows in complex rock sample

Large percentage of reservoir has heterogeneous structure e.g carbonate and shales. The numerical analysis of multi-phase fluid flows using digital rock is a complex and chanllening problem especially for rocks exhibiting pores with multiple length scales. Micro-CT imaging focuses on a single scale and there is a tradeoff between enough resolution to capture the most relevant pore types and large enough volume to be statistically representative. Some pore types are left under-resolved in micro-CT images, and ignoring their contribution to flow simulation can lead to large errors, particularly for two-phase flow simulations
In this presentation, we will demonstrate an extension to our LBM fluid flow solver to account for single-phase and two-phase flow in under-resolved porous regions in addition to resolved pores and presented simulation results for absolute permeability, capillary pressure and relative permeability
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