Storage capacity Tilje/Åre

In order to estimate the pore volumes and storage capacities of the aquifers, a regional geomodel was built with the Petrel software. The model was set up with a 500x500 m grid in the horizontal directions. In the vertical direction, each formation was represented by one layer. Average values for net/gross and porosity were estimated based on the logs and well reports from exploration wells in the area and manually contoured between the wells. The maps show that the Ile and Garn formations generally become more shale-rich to the NE. The major faults which have a potential to form barriers between different segments of the aquifers, were included in the model.

The purpose of this model was to calculate the total pore volumes of each aquifer and to assess how they are connected. Different approaches have been tested to estimate the storage capacity of the aquifers.

 

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3D view of the regional geomodel, showing the permeability. View from the NW. The Helgeland Basin to the left.

 

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Log correlation panel with gamma, porosity density and calculated net/gross. Layout showed in Tilje porosity map.