DRP-317 Bentheimer Notebook Report¶
Notebook: 19_mwe_drp317_bentheimer_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:
Bentheimer_2d25um_binary.raw - ROI size:
300 x 300 x 300voxels - Selected ROI origin:
(0, 0, 700) - 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 [%] | 22.64 |
| Full-image porosity [%] | 26.72 |
| ROI porosity [%] | 26.75 |
| Network absolute porosity [%] | 27.57 |
| Experimental permeability [mD] | 386.0 |
| Kx [mD] | 426.82 |
| Ky [mD] | 536.39 |
| Kz [mD] | 543.85 |
| Arithmetic mean permeability [mD] | 502.35 |
| Quadratic-mean permeability [mD] | 505.19 |
| Relative quadratic-mean error [%] | 30.88 |
Interpretation¶
Bentheimer remains noticeably high relative to the experimental reference, but the result is still within the same order of magnitude and behaves like a plausible PNM overshoot rather than a complete workflow failure.
The strong bias in both porosity and permeability suggests that representativeness and extracted-network geometry remain more important than the switch from constant viscosity to the new pressure-dependent viscosity model.