Effects of Image Resolution on Sandstone Porosity and Permeability as Obtained from X-Ray Microscopy

摘要: Estimating porosity and permeability for porous rock is a vital component of reservoir engineering, imaging techniques have to date focused on methodologies match image-derived flow parameters with experimentally identified values. Less emphasis has been placed the trade-off between complexity, computational time, error in identifying permeability. Here, effect image resolution derived from micro-X-ray microscopy (micro-XRM) discussed. A minicore plug Bentheimer sandstone imaged at $$1024 \times 1024 1024$$ voxels, voxel size 1.53  $${\upmu }\hbox {m}$$ , progressively rebinned as low 32 voxels per side (voxel 48.96  ). Pore-scale modeled using finite volume method open-source program OpenFOAM®. sharp drop images 24 12  suggests that an optimal speed/resolution may be found. The primary source due reassignment along pore–solid interface subsequent change pore connectivity. We observe both thresholding values order find balances acceptable range reasonable computation time.