Grayscale REV Analysis

Description

The data provided here is used to investigate the representative elementary volume (REV) size directly from grayscale micro-CT images of porous media of sandstone and carbonate. Three datasets are provided per sample: 16-bit grayscale image, 8-bit grayscale image, and segmented image. The re-quantization of a 16-bit grayscale image to 8-bit is carried out using ImageJ. The choice of intensities used carrying out this operation is provided in the supplementary information of the related publication. This dataset includes: 1) Sand pack Image size: 600^3 voxels Resolution: 5.2 micrometer Imaging Facility Used: Tyree x-ray imaging (https://www.engineering.unsw.edu.au/minerals-energy-resources/facilities/tyree-x-ray) Porosity: 35.4% Average Permeability: 48.72 D 2) Bentheimer Sandstone Image size: 600^3 voxels Resolution: 5.4 micrometer Imaging Facility Used: Tyree x-ray imaging (https://www.engineering.unsw.edu.au/minerals-energy-resources/facilities/tyree-x-ray) Porosity: 23.9% Average Permeability: 4.27 D 3) Fieldstone Image size: 500^3 voxels Resolution: 4.98 micrometers Data Source: This is a subset of the dataset provided at https://www.digitalrocksportal.org/projects/297 Porosity: 20% Average Permeability: 0.993 D 4) Ketton Carbonate Image size: 600^3 voxels Resolution: 5 micrometer Data Source: This is a subset of the dataset provided at https://www.digitalrocksportal.org/projects/167 Porosity: 10% Average Permeability: 1.27 D