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.

The following resources are included in this collection

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Seismological waveforms - Soultz-sous-Forêts 2000 Stimulation

Dataset

Waveforms from the 2000 GPK2 stimulation were recorded by 5 downhole stations and 18 surface stations

Catalogue with hydraulic data from Drif et al.(2024)- Soultz-sous-Forêts 2000 Stimulation

Dataset

This dataset summarizes hydraulic and seismic‑energy metrics for the 2000 Soultz stimulation, including hourly flowrate, injected volume, hydraulic energy, seismic moment, and derived efficiencies.

Velocity model and static corrections used by B. Dyer to locate seismic events acquired from the downhole network - Soultz-sous-Forêts 2000 Stimulation

Dataset

This dataset provides Dyer’s 2000 velocity model, built from GPK1 check‑shot velocities and sonic‑log gradients, plus refined static station corrections removing P/S traveltime bias. It links to Dyer’s downhole event catalogue

Velocity model and station corrections used by N. Cuenot to locate seismic events recorded by the downhole and the surface network - Soultz-sous-Forêts 2000 Stimulation

Dataset

1‑D velocity model and station corrections from N. Cuenot’s PhD, used to locate microseismic events of his first 2000 Soultz catalogue with a refined HYPOINVERSE workflow (iterative Vp, Vp/Vs adjustments and station corrections).

Velocity model and station corrections used by B. Dyer to locate seismic events recorded by the downhole and the surface network - Soultz-sous-Forêts 2000 Stimulation

Dataset

This dataset provides the velocity model and station corrections used by B. Dyer (2001), combining GPK1 check‑shot velocities with a sonic‑log gradient, and refining corrections to remove traveltime bias. It links to Dyer’s downhole and surface

Source mechanisms - Soultz-sous-Forêts 2000 Stimulation

Dataset

This catalogue provides 193 source mechanisms.

Microseismic surface network - Soultz-sous-Forêts 2000 Stimulation

Dataset

The 2000 surface network combined permanent ReNaSS and a Güralp sensor with 14 temporary stations (continuous and triggered). The temporary network was removed on 11 July, so later events were recorded only by permanent stations. Coordinates come from RESIF now Epos-France and Cuenot’s PhD.

Microseismic downhole network - Soultz-sous-Forêts 2000 Stimulation

Dataset

The 2000 downhole network used 3 accelerometers at ~1500 m and 2 hydrophones at 2000–3500 m.

Microseismic catalogue with moment magnitude and focal mechanisms by N. Cuenot - Soultz-sous-Forêts 2000 Stimulation

Dataset

This catalogue by N. Cuenot lists 265 events from the 2000 stimulation.

Microseismic catalogue of the surface network with local magnitude by B. Dyer - Soultz-sous-Forêts 2000 Stimulation

Dataset

This catalogue lists the 51 largest events of the 2000 episode, located with the surface network and matched to Dyer’s downhole catalogue.

Velocity model used by N. Cuenot to locate seismic events with a tomographic inversion method - Soultz-sous-Forêts 2000 Stimulation

Dataset

1‑D layered velocity model from N. Cuenot’s PhD, used as the input model for the local tomographic inversion that produced his second microseismic catalogue of the 2000 Soultz‑sous‑Forêts episode. It provides the reference velocities required to refine event locations.

Microseismic catalogue of the downhole network by B. Dyer - Soultz-sous-Forêts 2000 Stimulation

Dataset

The 2000 downhole catalogue includes 13 986 located microseismic events recorded between 30/06 and 19/07/2000.

Hydraulic data - Soultz-sous-Forêts 2000 Stimulation

Dataset

Hydraulic data from GPK2, GPK1 and EPS1 document the 2000 stimulation and the post‑stimulation injection test, including GPK2 flowrates, pressures, injection temperature, and GPK1 water level

Velocity model and static corrections used by N. Cuenot to locate seismic events acquired from the downhole and surface network - Soultz-sous-Forêts 2000 Stimulation

Dataset

Velocity models from Cuenot’s thesis were built from GPK1 sonic logs and calibration shots, first as an initial model for preliminary locations, then refined into the final model.

Microseismic catalogue of the surface and the downhole network with moment magnitude by N. Cuenot - Soultz-sous-Forêts 2000 Stimulation

Dataset

This preliminary catalogue by N. Cuenot lists 7 215 events from the 2000 stimulation, located with a modified HYPOINVERSE using both surface and downhole stations.

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

Dataset

This catalogue provides seismic moment and moment magnitude for events of the 2000 Soultz stimulation, derived from Cuenot’s focal‑mechanism catalogue.

Stakeholders

Creator(s)

École & Observatoire des Sciences de la Terre