Segmented sub-volume of the micro-CT dataset: voxels with resolved porosity are labeled 0, voxels with unresolved (sub-resolution) porosity are labeled 1 and solid material voxels are labeled 9. This was used in: "Bultreys T, Van Stappen J, De Kock T, De Boever W, Boone M, Van Hoorebeke L, et al. Investigating the relative permeability behavior of microporosity-rich carbonates and tight sandstones with multi-scale pore network models. J Geophys Res B Solid Earth 2016."