DRP-317 Bandera Brown Notebook Report¶
Notebook: 21_mwe_drp317_banderabrown_raw_porosity_perm
Sources¶
- Dataset: Neumann, R., ANDREETA, M., Lucas-Oliveira, E. (2020, October 7). 11 Sandstones: raw, filtered and segmented data [Dataset]. Digital Porous Media Portal. https://www.doi.org/10.17612/f4h1-w124
- Experimental reference paper: Neumann, R. F., Barsi-Andreeta, M., Lucas-Oliveira, E., Barbalho, H., Trevizan, W. A., Bonagamba, T. J., & Steiner, M. B. (2021). High accuracy capillary network representation in digital rock reveals permeability scaling functions. Scientific Reports, 11, 11370. https://doi.org/10.1038/s41598-021-90090-0
Current Setup¶
- Raw volume:
BanderaBrown_2d25um_binary.raw - ROI size:
(300, 300, 300)voxels - Selected ROI origin:
(700, 350, 350) - ROI porosity:
21.13% - Extraction backends:
porespy,prego,native_maximal_ball - Conductance model:
generic_poiseuille - Viscosity model: tabulated water viscosity from
thermo,298.15 K - Boundary pressures:
pout = 5.0 MPa,pin = pout + 10 kPa/m * L
Key Results¶
| Quantity | Value |
|---|---|
| Experimental porosity [%] | 24.11 |
| Full-image porosity [%] | 21.18 |
| ROI porosity [%] | 21.13 |
| Experimental permeability [mD] | 63.0 |
| Backend | Network phi [%] | Kx [mD] | Ky [mD] | Kz [mD] | RMS K [mD] | Rel. K error [%] | Np | Nt |
|---|---|---|---|---|---|---|---|---|
| PoreSpy snow2 | 21.25 | 65.33 | 58.30 | 65.45 | 63.12 | 0.18 | 5205 | 8207 |
| PREGO | 20.70 | 125.74 | 115.41 | 122.93 | 121.44 | 92.76 | 3304 | 6623 |
| Native maximal-ball | 20.70 | 32.92 | 24.55 | 32.77 | 30.33 | -51.85 | 2928 | 4876 |
Network Statistics Snapshot¶
| Backend | Mean coordination | Dead-end pore fraction |
|---|---|---|
| PoreSpy snow2 | 3.15 | 0.276 |
| PREGO | 4.01 | 0.098 |
| Native maximal-ball | 3.33 | 0.210 |
Interpretation¶
For Bandera Brown, the closest aggregate permeability in this rerun is
from PoreSpy snow2 with a relative permeability error of
0.18%. The spread between the
largest and smallest backend aggregate permeability is about 4.00x,
which makes extraction sensitivity a material part of this sample's validation
result.
This is a pore-network comparison against a laboratory-scale experimental reference. The numbers depend on the selected ROI, segmentation convention, boundary labeling, network reduction, and conductance closure; they should not be read as a direct voxel-scale flow simulation.