Episode: 2000 Stimulation Soultz-sous-Forêts

Description

During June/July 2000 a hydraulic stimulation program was conducted in the well GPK2 at the European Hot Dry Rock project, Soultz-sous-Forêts, France. The stimulation was performed over the openhole section of GPK2 from 4431 m measured depth (MD) to the bottom of the well at around 5084 m MD. A total of 27 800 m3 of water were injected. At the start of the stimulation 700 m3 of brine with a density of approximately 1.2 g/cc were injected in an effort to encourage downward growth of the stimulated region. The stimulation covered a period of 6 days. After a break of 7 days a post-fracturing, injection test was performed. Seismic monitoring continued for a further 11 days after the injection test (Dyer, B., 2001.Soultz GPK2 stimulation June/July 2000. Seismic monitoring report.).

Dates of the different tests of the 2000 hydraulic program:
- Stimulation test at GPK2: from 18:44 30/06/2000 to 16:33 06/07/2000.
- Post-stimulation injection test at GPK2: from 10:09 13/07/2000 to 20:25 15/07/2000.

This collection contains following ressources

Microseismic catalogue with seismic moment and moment magnitude from Drif et al.(2024) - Soultz-sous-Forêts 2000 Stimulation

icroseismic catalogue with seismic moment and moment magnitude from Drif et al.(2024) at Soultz-sous-Forets 2000.
For more details, see the article Induced Seismicity Controlled by Injected Hydraulic Energy: the Case Study of the EGS Soultz-sous-Forets Site by Drif,K., Lengline, O., Kinscher, J., Schmitbuhl, J. (2024) (http://dx.doi.org/10.1029/2023JB028190 )
This catalog is based on the Microseismic catalogue with moment magnitude and focal mechanisms by N. Cuenot - Soultz-sous-Forets 2000 Stimulation (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSFS2000-Catalogue_Cuenot_2).
Columns 1,2,3,4,5,6 come from the catalog M…

Hydraulic data - Soultz-sous-Forêts 2000 Stimulation

Hydraulic data recorded at GPK2 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK2), GPK1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-GPK1) and EPS1 (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/SSF-EPS1).

Two datasets are available:
SSFS2000-Hydraulic_stimulation.csv: hydraulic data from 30/06/2000 to 13/07/2000.
SSFS2000-Hydraulic_injection_test.csv: hydraulic data from 13/07/2000 to 20/07/2000.

The first dataset corresponds to the data collected during the stimulation phase of GPK2. The second dataset corresponds to the data recorded during the post-stimulati…

GNSS data at Soultz-sous-Forêts

GNSS data are recorded near Soultz-sous-Forêts at GPK1 and GPK2 stations and are provided by the operator GEIE EMC.
Data format is Rinex.
The stations are described (https://cdgp.u-strasbg.fr/geonetwork/srv/fre/catalog.search#/metadata/GNSS-Stations).
See : https://cdgp.u-strasbg.fr/Obsnef-Gnss/situation.php for stations location and data availability

GPK2 well

GPK2 was the third well drilled for geothermal purposes at Soultz-sous-Forêts after GPK1 and EPS1. The well has been drilled southern to GPK1. It constitutes the second well of the doublet and obtains a maximum of fluid recovery. GPK2 well reached 3900 m in 1995 by drilling in destructive mode only. Hydraulic tests have been done to characterize the exchanger and to evaluate the potential fluid flow.
In 1999, it was decided to exploit a lower level at 5000 m depth, where the temperature reaches 200°C in order to develop a geothermal resource aiming at electricity production? GPK2 was then extended to 5084 m.

Location GPK2 WGS84: Latitude: 48.9…

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Publisher

École & Observatoire des Sciences de la Terre

Location

Temporal coverage

2000

DOI

https://doi.org/https://doi.org/10.25577/SSFS2000

How to cite

GEIE and EOST (2018). Episode: 2000 stimulation Soultz-sous-Forêts. [Collection]. EOST - CDGP. https://doi.org/10.25577/SSFS2000

License

Except where otherwise noted, content for this ressource is licensed under a Creative Commons Attribution 4.0 International license.

Ressource last modified on Oct. 14, 2025