Upscaling Relative Permeability
The Upscaling Relative Permeability GeoApp allows you to compute relative permeability and capillary pressure curves for structures containing both resolved and unresolved porous materials. For the unresolved materials you need to pre-compute the capillary pressure curve and relative permeability on a higher resolution scale.
At the top of the dialog, enter the Result File Name. The result file is saved in the chosen project folder (File → Choose Project Folder in the menu bar).
Below, choose the Inflow Side, which defines from which domain side the invading fluid may enter the structure.
The Invading Fluid and the Displaced Fluid must be chosen from the Material Selector. Note, that the displaced fluid must be present in the loaded structure.
The Surface Tension and Contact Angle of the invading fluid work as described for Capillary Pressure Curve.
To Compute Relative Permeability for Saturations you enter the saturations as comma separated list. They work in the same way as for the Relative Permeability command.
For the Porous Material Properties you have to load capillary pressure curve and relative Permeability result files (*.gdr).
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Important! We strongly recommend, that the capillary pressure curve result files are computed with the same fluids, surface tension and contact angle as entered in this dialog. Otherwise the phase distribution and thus the permeability may not be correct. |
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Important! For the relative permeability result files select the computational direction according to the Inflow Side you want to choose in this dialog. This means if you choose z- as inflow plane, you have to compute the relative permeability in Z direction. |
The last two parameters, Breakthrough considered at Saturation and Parallelization are explained in Upscaling Mercury Injection Capillary Pressure.
During the calculation, first a capillary pressure curve is computed, where the displaced fluid can leave a residual. For the resolved pores, the saturation points from this run are taken for the relative permeability calculation, where the entered saturation points are approximated as in the Relative Permeability command.
For the unresolved porous materials, the input result files are used for the capillary pressure curve and the relative permeability values.
In the result file, the Pressure-Saturation plot shows the capillary pressure curve with the parts for the resolved and unresolved parts similar as in the Upscaling MICP GeoApp.
The Permeability plot is the same as for the Relative Permeability Plot.
