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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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slide1

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

slide2

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
slide4

What is so specialabout

regionaland transboundary waterresouces?

DRAWDOWN

(http://pubs.usgs.gov)

slide5

Thermalwaterusers

Twellhead > 20°C

slide7

Thermalwaterutilization

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

Bathing and balneology

Heating

slide8

Thermalwaterutilization

P = 180 kWe net T = 110°C

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

slide9

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

slide10

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
slide14

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
slide15

Futuregeothermaldevelopment

Hydrogeological potential

regional and transboundary aquifers

→ interferences → numerical models

slide16

Futuregeothermaldevelopment

  • Legislative potential
  • Applications foror granted water concessions (AT, SI, SK):
      • +30 mio m3 annually
      • Heat extraction:
      • reinjectionwithdoublets
      • Management of resources:
      • benchmarking
slide17

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
slide18

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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