Results of capacity testing of geothermal heating project in Vienna, Austria exceed expectation
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Testing of the geothermal wells in Aspern in Vienna, Austria has been completed, with results indicating the project may support more capacity than expected.
OMV and Wien Energie have completed capacity testing of the deep geothermal project in Aspern in Vienna, Austria, with results exceeding that of initial expectations. A formation water temperature of 104 ºC was measured, against an expected 100 ºC. Considering the available flowrates, the project partners are forecasting a thermal output of 25 MWth instead of the initial 20 MWth.
The construction of the heating plant is scheduled to begin by 2027 with a target commissioning date by 2029. Seven deep geothermal plants with a total capacity of 200 MWth are being planned by OMV and Wien Energie around Vienna. Several wells and plant sites are planned to be constructed in parallel, giving the benefit of more efficient resource use. Planning of the further projects is contingent upon the results of the pilot plant in Aspern.
The geothermal heating project in Vienna is being executed under the “deeep” joint venture between OMV and Wien Energie, which was formed in 2023. Drilling in Aspern started in December 2024 and was completed by July 2025. As described by Ulli Sima (SPÖ), City Councillor for Urban Development, Mobility, and Vienna Public Utilities, the tests of the wells have delivered “sensational results.”
“By 2040, we will generate approximately a quarter of Vienna’s district heating using deep geothermal energy,” commented Wien Energie Managing Director Sascha Zabransky.
Source: Wien.ORF.at
