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The - and Prometheus-Project:

The - and Prometheus-Project: Concepts for the Extraction of Heat from Deep and Tight Sedimentary Rock Jens Orzol (1), F. Rummel (2), R. Jung (1) (1): GGA-Institute, (2): Ruhr-University Bochum/MeSy GmbH. „Classically:“ Geothermal energy use of

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The - and Prometheus-Project:

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  1. The - and Prometheus-Project: Concepts for the Extraction of Heat from Deep and Tight Sedimentary Rock Jens Orzol (1), F. Rummel (2), R. Jung (1) (1): GGA-Institute, (2): Ruhr-University Bochum/MeSy GmbH

  2. „Classically:“ Geothermal energy use of Hydrothermal Resources and by HDR/EGS-technology in crystalline rocks One step further: Extend geothermal energy extraction to deep and tight sedimentary rocks

  3. sedimentary rocks low porosity & permeability create artificial geothermal systems (EGS) transfer waterfrac technology to sediments Is there a self propping mechanism for sediments? fracture propagation in layered sediments? …. GeneSys & Prometheus

  4. stimulated heat exchanger

  5. carboniferous rocks in a quarry south of well site • faults and fractures from variscan orogeny

  6. extrapolated to 4000 m: • 101°C – 115°C– 128°C • conservative estimate • status: • detailed feasibility study • finished • currently: planning of an • exploratory well

  7. develop and test one well concepts • direct use: range of few MWthermal • potentially economically attractive for numerous consumers

  8. F. Böker, 1994 Research well Horstberg Z1 (4100 m) for in-situ testing and concept development Hannover site: pilot project for geothermal supply of GeoCenter

  9. Stimulation operations • Injection of 20.000 m³ fresh water • Creation of a large fracture with high conductivity ≈ 330 bar 50 l/s

  10. Cyclic operation sheme 1) Injection of cold water into frac 2) shut-in, where water heats up 3) production of hot water from frac 4) energy extraction by heat-exchanger

  11. deep vertical circulation concept

  12. deep vertical circulation concept

  13. deep vertical circulation concept

  14. F. Böker, 1994 Challenges at Hannover site (GeoCenter) • deep drilling close to residential area • water supply for stimulation • frac-monitoring

  15. projects aim to transfer EGS concepts to sediments one well concepts and „classical“ HDR Water frac technology applicable to sediments fracture: large area, high conductivity one well concepts proven Preparatory work for Hannover and Bochum site started drilling 2006/2007 Conclusions/Outlook Thank you!

  16. Cyclic operation sheme 1) Injection of cold water into frac

  17. Cyclic operation sheme 2) Heating up of water in frac

  18. Cyclic operation sheme 3) Production of hot water from frac

  19. ≈ 200 m ! Fracture height Solling-Sdst. • fracture propagates through claystone! Detfurth-Sdst.

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