DRP-317 Bandera Gray Notebook Report¶
Notebook: 20_mwe_drp317_banderagray_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:
BanderaGray_2d25um_binary.raw - ROI size:
500 x 500 x 500voxels - Selected ROI origin:
(500, 500, 250) - 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 [%] | 18.10 |
| Full-image porosity [%] | 21.03 |
| ROI porosity [%] | 20.99 |
| Network absolute porosity [%] | 20.70 |
| Experimental permeability [mD] | 9.0 |
| Kx [mD] | 48.02 |
| Ky [mD] | 36.62 |
| Kz [mD] | 62.00 |
| Arithmetic mean permeability [mD] | 48.88 |
| Quadratic-mean permeability [mD] | 49.97 |
| Relative quadratic-mean error [%] | 455.20 |
Interpretation¶
Bandera Gray is currently the hardest DRP-317 case for the present voids PNM
workflow. Even after switching to the paper-like conductance closure, pressure
convention, ROI scan, and pressure-dependent viscosity path, the predicted
permeability is still far too high.
This page is therefore the clearest validation signal that the current image-to-network reduction is not yet capturing the flow-limiting structure of the lowest-permeability sandstone in the set.