High-resolution 3D fabric and porosity model in a tight gas sandstone reservoir:A new approach to investigate microstructures from mm- to nm-scale combining argon beam cross-sectioning and SEM imaging

► Tight gas productivity could strongly benefit from imaging porosity at pore scale. ► BIB-SEM allows imaging pores of 10 nm in true 2D sections, as unprecedented. ► Serial cross sectioning produces a 3D model of the porous network and fabric. ► This results in a porosity model both at the scale of sand grains and clay grains. ► Pore scale microstructures are bridged with macro-scale properties.