EFFECTS OF SIMULATOR MESH GEOMETRY ON A SIMPLE THREE DIMENSIONAL TOUGH2 MODEL
A simple model simulating geothermal production was created using the TOUGH2 EOS1 Fluid Property Module using the PetraSim graphical user interface. Cooler fluid was injected into a centrally located injection well and water was pumped from two nearby extraction wells. Four simulation meshes were created using various meshing techniques to compare the use of horizontal and non-horizontal cell layers and rectangular and polygonal mesh elements. Flow rates and energy production for the two production wells were compared for all four models to determine whether either of the layer characteristics had a significant effect on the fluid flow within the simulation. The results showed that for this example, the orientation of cell layers has more of an effect on model results than the shape of the model element. This is most likely because flow between wells is non-horizontal and follows the general orientation of the cell layers in the non-horizontal layer models.