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State-of - the - art of thermal water utilization in the TRANSENERGY region: PowerPoint PPT Presentation


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State-of - the - art of thermal water utilization in the TRANSENERGY region: current state, potentials and challenges. Nina Rman 1 Nóra Gál 2 , Daniel Marcin 3 , Katarína Benková 3 , Julia Weilbold 4 , Gerhard Schubert 4 , Tadej Fuks 1 , Dušan Rajver 1 , Andrej Lapanje 1 , Annamária Nádor 2

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State-of - the - art of thermal water utilization in the TRANSENERGY region:

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State-of-the-art of thermal water utilization

in the TRANSENERGY region:

current state, potentials and challenges

Nina Rman1

Nóra Gál2, Daniel Marcin3, Katarína Benková3, Julia Weilbold4, Gerhard Schubert4, Tadej Fuks1, Dušan Rajver1, Andrej Lapanje1, Annamária Nádor2

1 Geological Survey of Slovenia

2 Geological and Geophysical Institute of Hungary

3State geological Institute of Dionýz Štúr, Slovakia

4 Geological Survey of Austria

Vienna, 24.6.2013


Aimofthisoverview

  • geothermal energy utilization in the project area (year 2011)

  • recognition of possible transboundary aquifers

  • impact of exploitation on regional hydrogeological conditions

  • potential for increased exploitation

  • challenges of sustainable geothermal energy utilization


Geothermal energy resource


What is so specialabout

regionaland transboundary waterresouces?

DRAWDOWN

(http://pubs.usgs.gov)


Thermalwaterusers

Twellhead > 20°C


Maximumwellhead temperature

Twellhead (°C)


Thermalwaterutilization

Foto: S.M., K.M., T.F.

Bathing and balneology

Heating


Thermalwaterutilization

P = 180 kWe net T = 110°C

Q = 20 l/s M = 18 g/l


Exploitedgeothermalaquifers

11 different aquifers

0.5 to 2 km depth

Q = 10-35 l/s

high abstraction →

pump failures due to

sand clogghing

Q = 5-10 l/s

lots of H2S,CO2→ carbonates scaling →

inhibitors

Q = 20-30 l/s

lots of CO2→ carbonates scaling →

inhibitors


Monitoring ofgeothermalwells

Groundwater level monitoring

  • Groundwater level (m)

  • Momentary yield (l/s)

  • Cumulative quantity (m3)

  • Water temperature (°C)

  • Chemical monitoring

  • Identify anomalous changes

  • Sustainable management

  • Benchmarking indicators


Thermalwaterproduction


Exploitationcharacteristics


Wastethermalwatermanagement

sewage


Futuregeothermaldevelopment

  • Technical potential

  • 65 inactive users

  • 94 inactive wells

    • +7 mio m3annually:

  • Upper Miocene clasticrocks: +2.8 million m3

  • MZ carbonates: +1.7 million m3

  • Others: app. + 2.8 million m3


  • Futuregeothermaldevelopment

    Hydrogeological potential

    regional and transboundary aquifers

    → interferences → numerical models


    Futuregeothermaldevelopment

    • Legislative potential

    • Applications foror granted water concessions (AT, SI, SK):

      • +30 mio m3 annually

      • Heat extraction:

      • reinjectionwithdoublets

      • Management of resources:

      • benchmarking


    Conclusions

    • Utilization status in 2011 : 148 users with 307 active wells

    • Low temperature resources: direct use and 1 binary electricity power plant

    • 2 most favourable geothermal aquifers: MZ carbonates & Upper Miocene sand

    • Indications of overexploitation

    • Cascade use: improves thermal efficiency and reduces water demand

    • Inactive geothermal wells

    • Low and intermediate temperature potential for new drillings

    • Limited hydrogeological potential can be expanded by reinjection

    • Monitoring system: comparable and systematic, public data

    • Sustainable development: pilot models, benchmarking and strategy paper


    Interactive webmaps and database of users

    Thermal water temperature and

    surface heat flow density

    http://transenergy-eu.geologie.ac.at/

    http://akvamarin.geo-zs.si/users

    Wellbore database

    Geological maps

    Utilization maps

    Geothermal maps

    Combination of layers

    !!! Scale !!!!

    Temperature at 1000 m and thermal water users

    Most tapped geothermal aquifers and

    extent of the Upper Miocene sand


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