Multi-scale Digital Rock: Application of a multi-scale multi-phase workflow to a Carbonate reservoir rock

In some of the challenging digital rock applications trade-off between model resolution and representative elemental volume is not captured in a single satisfying minimum requirements for both aspects. wide range lithofacies found carbonate reservoir rocks, facies fall this category, where large pores, ooids or vugs, are connected by small scale porous structures that could have orders magnitude smaller pores. these cases multi-scale approach needed. We recently developed an extension to workflow includes way handle sub-resolution pore phase multi-phase flow scenarios addition regular resolvable structures. Here we present application methodology limestone rock. A microCT image captures pores sample, but does resolve all than pixel size. three segmentation considers pore, solid under-resolved media (PM) generated. high confocal obtained region PM region. set constitutive relationships (namely permeability vs. porosity, capillary pressure vs saturation relative saturation) simulation from model. The low segmented image, porosity distribution input extended LBM solver. First results absolute show parametric study on permeability. recovers expected behaviour when regions considered solid. consistent value with experiments use To demonstrate behaviour, imbibition simulations. dual system created order compare Finally, whole domain shown different wettability scenario discussed. This illustrates novel can address long standing problem