The 2004 stimulation was aimed at improving the hydraulic performances of the well GPK4. This borehole was stimulated twice. The present test corresponds to the first stimulation of GPK4. Included are the data from a pre-stimulation low flow injection test that was performed to evaluate the initial injectivity of GPK4.
The 2005 stimulation is the second stimulation of GPK4, after the previous one, performed in September 2004. The 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 was performed before the chemical stimulation and the second after, in order to observe the efficiency of the chemical stimulation. The program was in the...
Experimental data described in and used to generate the figures of the paper: Jestin, C., Lengliné, O., Schmittbuhl, J. (2019). Energy partitioning during sub-critical mode I crack propagation through a heterogeneous interface. Journal of Geophysical Research: Solid Earth, 124. https://doi.org/10.1029/2018JB016831
The stimulation was performed in 2003 mainly by massive injection into the well GPK3. The stimulation strategy can be divided in five parts: - Injection into GPK3; - Injection into both GPK2 and GPK3 (“dual” or “focused” stimulation, Baria et al., 2004); - Shut in GPK2; - Shut in both GPK2 and GPK3 and production from GPK2; - Circulation test GPK2-GPK3 following stimulation
The EstOF network consists in 288 miniaturized seismic stations (Zland nodes, 1C, 10Hz) installed between August 25th 2014 and September 30th 2014 in the Outre-Forêt region (Alsace, France) around the deep geothermal sites of Soultz-sous-Forêts and Rittershoffen. A regular grid of 260 stations separated by ~1.4km forms the backbone of the network, which was completed by a denser array of 28 stations every ~400m around the Rittershoffen site.
Dataset related to the article "Direct modelling of the mechanical strain influence on CWI and implications for strain monitoring of reservoirs"Jérôme Azzola, Jean Schmittbuhl, Dimitri Zigone, Vincent Magnenet & Frédéric Masson
Data and input parameters used to generate the figures of the paper: J. Azzola, J. Schmittbuhl, D.Zigone, V. Magnenet, and F. Masson (2017). Direct modeling of the mechanical strain influence on coda wave interferometry. Journal of Geophysical Research: Solid Earth, 123, 3160–3177. https://doi.org/10.1002/2017JB015162 This work has been published under the framework of the LABEX ANR-11-LABX-0050-G-EAU-THERMIE-PROFONDE and benefits from a funding from the state managed by the French National Research Agency (ANR) as part of the...
During June/ July 2000 a hydraulic stimulation program was conducted in the well GPK2. The stimulation was performed over the open hole section of GPK2 from 4431 m (measured depth) to the bottom of the well at around 5084 m. A total of 27 800 m3 of water were injected. At the start of the stimulation 700m3 of brine were injected in an effort to encourage downward growth of the stimulated region. The stimulation covered...
In 1993, during the development of the european enhanced geothermal system field of Soultz-sous-Forêts (Alsace), 44000 m3 of water have been injected to create the reservoir by stimulating the natural fracture system of the granitic rock mass. Some 16000 microseismic events have been recorded by a network consisting of a hydrophone and 3 four-component accelerometers, cemented in the granite at the bottom of observation wells.