en.Wedoany.com Reported - Capacity test results for the deep geothermal project in Aspern, Vienna, Austria, jointly developed by OMV and Wien Energie, have exceeded expectations. The measured formation water temperature reached 104°C, higher than the anticipated 100°C. Considering the available flow rate, the project partners forecast a thermal output of 25 MWth, rather than the initially estimated 20 MWth.

Construction of the heating plant is scheduled to begin in 2027, with the goal of commissioning in 2029. OMV and Wien Energie are planning to build seven deep geothermal plants with a total capacity of 200 MWth around Vienna. The planning of subsequent projects will depend on the results of the Aspern pilot plant, with plans to construct multiple wells and sites in parallel to improve efficiency.

The project is being executed by the "deeep" joint venture, established by OMV and Wien Energie in 2023. Drilling at Aspern commenced in December 2024 and was completed in July 2025. Ulli Sima (SPÖ), Vienna City Councillor for Urban Development, Transport, and Utilities, described the test results from these wells as "sensational."

Sascha Zabransky, Managing Director of Wien Energie, stated that by 2040, deep geothermal energy will provide approximately one-quarter of Vienna's district heating.