Stream I
District Heating, Cooling and Power Network
Kirchanschöring has an installed network providing heating and power to consumers in the Municipality. Operated by two local companies, these networks are being expanded to accommodate energy demand growth and provide energy to new industrial facilities.
Network by Energieversorgung Schmid
EVU-Schmid is the distribution network operator with network levels 5 (medium voltage 20.000 V), 6 (conversion from medium to low voltage 20.000 V / 400 V) and 7 (low voltage, 400 V / 230 V).
In 2019 EVU-Schmid constructed the power supply for the Ruperti II geothermal drilling site and in 2020 the planned development of the geothermal construction site required a 5 MWe connection capacity provided by EVU-Schmid.
Image: EVU-Schmid
Biomass heat supply area by Niedermayer GmbH
Niedermayer is a family-owned local heat and power operator with a biomass plant that’s been in operation since 1999.
The current output capacity of the biomass plant is 3.1 MWt with peak load supply provided by a 2.1MWt oil boiler. The system is supported by PV system capacity 57 kWp.
The biomass plant lies on the southern edge of Kirchanschöring with the current output for the connected heat consumers is currently around 2.4 MWt.
There are three biomass plants generatung 850MWh of electricity per year, representing one-third of the biomass plants' energy production.
The remaining two-thirds are process waste heat and heat for building heating in Kirchanschöring.
Image Niedermayer GmbH
Deep Borehole Heat Exchangers (DBHE)
Drilling by GTR was able to measure temperatures in excess of 150 degrees Centigrade in the Malm reservoir.
This was a higher temperature than was expected in the pre-drill assessments.
Recent developments in closed loop co-axial Downhole Borehole Heat Exchangers (DBHE) will provide the potential to deliver heated fluids to surface that can be connected to the district heating network via a 1km long pipeline to the Kirchanschöring biomass facility.
Engineering studies will be undertaken to show that the KIR-GT2 borehole can be safely re-entered and can be completed with a DBHE and insulated tubulars.
GTR has retained Sproule-ERCE to undertake a Feasibility Study assessment to determine the DBHE potential.
Image Illustrative single coaxial Downhole Borehole Heat Exchanger (from Sun et al 2019).
Ampfinger Sandstone Reservoir
Potential hydrothermal or heat storage reservoir?
The 'Ampfinger’ quartz sandstone is named after the first economic oil discovery in the German Alpine foothills made in 1954 in an antithetic trap structure near Ampfing, west of Mühldorf am Inn, Bavaria.
Further hydrocarbon deposits in the Ampfing were discovered in the Isen, Mühldorf-Süd-Waldkraiburg, Teising, Velden and Weitermühle-Steinkirchen oil fields.
The geothermal potential of the Ampfinger Sandstone is significant, with its favourable reservoir characteristics, high temperatures, and good fluid permeability, making it a potential candidate for the development of sustainable deep geothermal energy resources.
Regional data for the Ampfinger shows porosities of 15 to 20%, permeability average 600 mD and maximum thickness of 30m.
Ampfinger Sandstone in the “Ruperti” permit
In the pre-drilling assessment, the Eocene-aged Ampfinger Sandstone was not considered as a potential geothermal reservoir and drilling was entirely focussed on the deeper Upper Jurassic Purbeck/Malm carbonates, however sufficient wireline logs were acquired to undertake reservoir quality analysis.
Drilling of the KIR-GT2 borehole penetrated a 20m thick Ampfing sandstone at 3862m TVD/4’048m MD with the sandstone drilled with a 12 ¼” borehole and now behind a 9 5/8” steel casing.
To determine the geothermal potential of the Ampfing reservoir, GTR has retained Sproule-ERCE to undertake petrophysical analysis of the wireline logs acquired in KIR-GT2 and will be undertaking further technical studies.
Planned Timeline to Deliver Heating and Cooling project
February 2026Ownership of GTR passed to ZeroGeo Energy GmbH
1st Quarter 2026Techno-economic studies to determine potential Green Energy Hub business streams
2nd Quarter 2026Agreements with Kirchanschöring Municipality and industrial customers for heating and cooling offtake requirements
3rd-4th Quarter 2026Detailed technical and engineering studies to define work programme to provide heating and cooling requirements
December 2026Final Investment Decision Stream I
1st Quarter 2027Tendering for drilling activities and surface heat and power systems. Purchase of long lead items
2nd Quarter 2027Commence drilling activities and construction of and surface heat and power systems
December 2027