Case03 Non-matching meshes
Contents
The objective of the current tutorial is to demonstrate the mapping of data for ParaGeo-Pflotran-OGS simulations when the meshes for the geomechanical (ParaGeo) and flow (Pflotran-OGS) models are non-matching. As such, a new reservoir grid with a different discretization to the previous cases will be exported. This new reservoir grid considers mesh refinement near the well region and only two elements across the reservoir thickness as shown in the picture below.
Reservoir grid considered in the present cases
The simulation set up in all the cases considered here will be akin of Case01b where CO2 injection is performed into a saline aquifer and the thermal field is solved by Pflotran-OGS. No data file set up will be described here as the only variation between the different cases is the discretization on the mesh considered in the geomechanical model (ParaGeo).
The different cases comprise:
▪Case03a: Matching meshes in the reservoir between the geomechanical and flow models
▪Case03b: Geomechanical model with a coarser HEX mesh than the flow model
▪Case03c: Geomechanical model with a TET mesh
Meshes defined for the different cases considered
The data used to generate the new reservoir grid is provided in PFO_001\Case03\GridGen\Data. The data for the different simulation cases is provided in PFO_001\Case03\Data and the results in PFO_001\Case03\Results.
Results
The results discussed here correspond to the geomechanical model results at the end of CO2 injection. These can be found in the corresponding case sub-folders within the PFO_001\Case03\Results folder.
The figure below shows the comparison of output results from the geomechanical model for the three cases. It can be observed that the three cases with different geomechanical model mesh discretizations provide very similar results.
Reservoir Gas saturation, temperature and pore pressure distributions for the three cases at the end of CO2 injection (t ~20.7)
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