Episode: 2005 Stimulation Soultz-sous-Forêts

Description

During February/March 2005 a hydraulic stimulation program was conducted in the well GPK4 at European Hot Dry Rock Project, Soultz-sous-Forêts, France. It is the second stimulation of GPK4, after the previous one, performed in September 2004. The hydraulic stimulation was followed a few days later by a program of chemical stimulation (injection of diluted HCl). This program involved the chemical stimulation itself and two identical step-rate injection tests. The first injection test was performed before the chemical stimulation and the second after, in order to observe the efficiency of the chemical stimulation.

Dates of the 2005 hydraulic programme:
- Second hydraulic stimulation of GPK4: from 18:05 07/02/2005 to 18:00 11/02/2005.
- First step-rate injection test of GPK4: from 15:30 22/02/2005 to 15:30 25/02/2005.
- Chemical stimulation of GPK4 with HCl: from 13:30 02/03/2005 to 06:00 05/03/2005.
- Second step-rate injection test of GPK4: from 10:00 13/03/2005 to 09:55 16/03/2005.

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Microseismic downhole network - Soultz-sous-Forêts 2004 and 2005 Stimulations

Dataset

This summary describes the 2004–2005 downhole microseismic network at Soultz, composed of accelerometers and high‑temperature geophones installed in six boreholes.

Velocity model and static corrections used to locate seismic events from the downhole network during 2004 and 2005 stimulations - by B. Dyer

Dataset

This summary describes the velocity model used by B. Dyer to locate microseismic events during the 2004 and 2005 Soultz stimulations. It is the reference model applied for event locations in the 2004 and 2005 downhole catalogues, both available online.

Catalogue with hydraulic data from Drif et al.(2024)- Soultz-sous-Forêts 2005 Stimulation

Dataset

This catalogue provides hydraulic and seismic‑energy metrics for the 2005 Soultz episode, including hourly flow rate, injected volume, hydraulic energy, seismic moment, radiated energy, and efficiency ratios.

Hydraulic data - Soultz-sous-Forêts 2005 Stimulation

Dataset

This dataset contains hydraulic measurements from GPK1–GPK4 and EPS1 during the 2005 GPK4 stimulation, including injection flowrate, injected volume, injection temperature, tank conditions, and wellhead/annulus pressures.

Microseismic catalogue of the downhole network by B.C. Dyer - Soultz-sous-Forêts 2005 Stimulation

Dataset

This catalogue lists 3709 microseismic events from the 2005 GPK4 hydraulic programme.

Microseismic catalogue with seismic moment and moment magnitude from Drif et al.(2024) - Soultz-sous-Forêts 2005 Stimulation

Dataset

This catalogue provides seismic moment and moment‑magnitude values for the 2005 Soultz episode, derived from Dyer’s downhole catalogue and recalculated following Drif et al. (2024).

Seismological waveforms - Soultz-sous-Forêts 2005 Stimulation

Dataset

This dataset contains seismological waveforms recorded during the 2005 GPK4 stimulation at Soultz‑sous‑Forêts, using both the downhole and surface seismic networks. The full description of the downhole network is available online.

Stakeholders

Creator(s)

École & Observatoire des Sciences de la Terre