Two-phase flow of CO2-brine in a heterogeneous sandstone: Characterization of the rock and comparison of the lattice-Boltzmann, pore-network, and direct numerical simulation methods

•Characterization of a heterogeneous sandstone from a formation in which CO2 sequestration has been undertaken.•Comparison of three distinct methods of simulating two-phase flow in porous media, namely, lattice-Boltzmann, pore-network, and direct image-based numerical computations.•Demonstrating the significance of the resolution of the computational grids used in the image-based lattice-Boltzmann simulation.