Industrial and applied R&D results in deep geothermal

projects from Alsace, France

GeoEnergi 2019 Bergen, Norway

04th February 2019 Albert Genter

Soultz core

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Geothermal rush in Western Europe

Vidal & Genter, Geothermics 2018

Électricité de Strasbourg Other competitor Électricité de Strasbourg

4 Illkirch rig

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Large fractured reservoir

Magnenet et al., 2014

Fault core:

H=1-30m

Damaged zone:

H=1 -100m

Granite

Sediments

Transition zone:

H=150m

Geothermal fluid

Vidal et Genter, 2018

BRGM, 2018

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Sediments

Granite

GPK2

GPK1 GPK4

GPK3

Pump

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Maurer et al., 2018

Genter et al., 2010

Temperature measured at

shallow depth (<200m) and

extrapolated to the top of the

convection cell (Trias sediments)

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Rittershoffen Plant

Soultz Plant

Exclusive Permit zone

10 to 20 plants

Development Zone

(interference test

between Soultz &

Rittershoffen)

3D Seismic Zone

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Richard et al., 2019

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2D seismic survey Aeromagnetic survey Gravimetric survey

5000 km

Altitude 300 m

Edel et al., 2018

Vibro-seismic trucks

37 km

PSDM processing

Gravimeter

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3D model of the local fault Borehole trajectories

Two geothermal deviated wells, 3300 m MD

Geothermal water @ 150°C

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1 500

1 700

1 900

2 100

2 300

2 500

2 700

150 155 160 165 170 175 180

De

pth

TV

D [

m]

Temperature [°C]

GRT-1 Temperature profile

GRT-2 Temperature profile

Top Basement

Top Buntsandstein

Top Muschelkalk

GRT-1 main flow zone(major fault zone)

GRT-2 main flow zone(assumed)

Casing shoe GRT-1Casing shoe GRT-2

Depths are expressed in TVD

Baujard et al 2017 Geothermics

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Glaas et al, 2018

• Soultz binary plant

• Fractured granite

• Brines, ~100g/L, NaCaCl

• Lithium 160mg/L

• 1.7MWe for electricity production

• Three wells @ 5000 m

• Q>30L/s T>150°C

• Rittershoffen heat plant

• Fractured granite

• Brines, ~100g/L, NaCaCl

• Lithium 180mg/L

• 24MWth for a heat application

• Two wells @ 2 500m

Q>70L/s T>168°C

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Mouchot et al, 2018

Tertiary

Jurassic

Sediments

(clays, marls)

Marls Keuper

Sandstones

Buntsandstein

Granite

Basement

Limestones

Muschelkalk

Improvement by a factor 4 the initial productivity

Naturally fractured reservoir

Baujard et al 2017 Geothermics

Critical threshold (Ml 1.7) never reached

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Maurer et al. 2015, WGC2015

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The presented results received cofundings from the European Union’s Horizon 2020 research and innovation program under grant agreement No 691728 (Destress) and No. 792037 (MEET)