Fullyimplicit simulation of verticalequilibrium

Authors: Halvor Møll Nilsen KnutAndreas Lie Odd Andersen

Publish Date: 2015/11/26

Volume: 20, Issue: 1, Pages: 49-67

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Abstract

Geological carbon storage represents a new and substantial challenge for the subsurface geosciences To increase understanding and make good engineering decisions containment processes and largescale storage operations must be simulated in a thousand year perspective A hierarchy of models of increasing computational complexity for analysis and simulation of largescale CO2 storage has been implemented as a separate module of the opensource Matlab Reservoir Simulation Toolbox MRST This paper describes a general family of twoscale models available in this module The models consist of twodimensional flow equations formulated in terms of effective quantities obtained from hydrostatic reconstructions of vertical pressure and saturation distributions The corresponding formulation is fully implicit and is the first to give a massconservative treatment and include general nonlinearized CO2 properties In particular the models account for compressibility dissolution and hysteresis effects in the finescale capillary and relative permeability functions and can be used to accurately and efficiently study the combined largescale and longterm effects of structural residual and solubility trappingThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team

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