Hydraulic stimulation is a well-operation that aims at enhancing fluid flow at depth. It is applied to exploit unconventional hydrocarbon reservoirs with low permeability and deep geothermal resources. Induced earthquakes frequently accompany the injection of fluids into boreholes potentially leading to damage to infrastructure at the surface and thus generally raising public concern. Damage caused by such events have already terminated Enhanced Geothermal Energy projects in South Korea and Switzerland. Hence, finding safe stimulation methods is critical for future use and public acceptance of geothermal energy projects and potential other forms of energy extraction from the underground. A range of stimulation techniques have been developed to increase the permeability of low-permeable reservoirs, however, our understanding of the processes involved in the formation of hydrofracs and hydroshears and the effectiveness of these operations regarding flow enhancement are still rather limited. A series of successful mine-back experiments have been performed in a range of underground laboratories in Europe. For this session, we invite presentations covering the full range of rock mechanics experiments, underground laboratory testing, and field-scale operations aiming at improving the fundamental understanding of stimulation operations.

Co-organized as EMRP1.91/NH4.7/SM6.4
Convener: Georg Dresen | Co-conveners: Grzegorz Kwiatek, Joerg Renner
| Thu, 11 Apr, 14:00–15:45
Room L2
| Attendance Thu, 11 Apr, 16:15–18:00
Hall X1

Attendance time: Thursday, 11 April 2019, 16:15–18:00 | Hall X1

Chairperson: Georg Dresen
X1.122 |
| Highlight
Georg Dresen, Joerg Renner, Marco Bohnhoff, Heinz Konietzki, Grzegorz Kwiatek, Katrin Plenkers, Gerd Klee, and Tobias Backers
X1.123 |
Bernard Adero, Jörg Renner, and Gerd Klee
X1.124 |
Katrin Plenkers, Grzegorz Kwiatek, Felix Blümle, Joerg Renner, and Georg Dresen
X1.126 |
Yan Cheng, Victoria Jimenez, and Joerg Renner
X1.127 |
| presentation
Sebastian Rehde, Heinz Konietzky, and Jörg Renner
X1.128 |
Carolin Boese, Felix Blümle, Grzegorz Kwiatek, Juliane Starke, Katrin Plenkers, and Georg Dresen
X1.129 |
SanLinn. I. Kaka, Ardiansyah I. Koeshidayatullah, and Juan M. Reyes-Montes
X1.130 |
Julia Ghergut, Horst Behrens, and Martin Sauter
X1.131 |
Mohammadreza Jalali, Clément Roques, Stéphane Leresche, Bernard Brixel, Peter-Lasse Giertzuch, Joseph Doetsch, Florian Schopper, Nathan Dutler, Linus Villiger, Hannes Krietsch, Valentine Gischig, Benoît Valley, and Florian Amann
X1.132 |
Corentin Noël, François Passelègue, Lucas Pimienta, and Marie Violay
X1.134 |
High and slowly changing injection rates reduce chance to form far-extending pathways for fluid migration by the injection-induced fractures at The Geysers geothermal field
Stanislaw Lasocki and Beata Orlecka-Sikora