DRP-317 Leopard Notebook Report¶
Notebook: 27_mwe_drp317_leopard_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:
Leopard_2d25um_binary.raw - ROI size:
(300, 300, 300)voxels - Selected ROI origin:
(0, 0, 0) - ROI porosity:
19.50% - 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 [%] | 20.22 |
| Full-image porosity [%] | 19.50 |
| ROI porosity [%] | 19.50 |
| Experimental permeability [mD] | 327.0 |
| Backend | Network phi [%] | Kx [mD] | Ky [mD] | Kz [mD] | RMS K [mD] | Rel. K error [%] | Np | Nt |
|---|---|---|---|---|---|---|---|---|
| PoreSpy snow2 | 20.01 | 475.08 | 259.61 | 131.55 | 321.66 | -1.63 | 1929 | 3158 |
| PREGO | 19.30 | 757.98 | 555.62 | 355.88 | 580.20 | 77.43 | 1049 | 2350 |
| Native maximal-ball | 19.30 | 331.38 | 174.04 | 74.78 | 220.38 | -32.61 | 820 | 1390 |
Network Statistics Snapshot¶
| Backend | Mean coordination | Dead-end pore fraction |
|---|---|---|
| PoreSpy snow2 | 3.27 | 0.338 |
| PREGO | 4.48 | 0.087 |
| Native maximal-ball | 3.39 | 0.229 |
Interpretation¶
For Leopard, the closest aggregate permeability in this rerun is
from PoreSpy snow2 with a relative permeability error of
-1.63%. The spread between the
largest and smallest backend aggregate permeability is about 2.63x,
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.