Deep geothermal energy is a sustainable energy source. As any activity associated to deep well injections, geothermal projects require to mitigate properly risks of triggered seismicity. Among these, the Geoven project, north of Strasbourg, with two seismic clusters occurring in its vicinity in 2019-2020, one adjacent to the site and the other 5 km to the south. We assess the possible link between these activities and those seismic events. The methodology combines analyzing the fault geometry and tectonic stresses, pressure perturbations due to injection, and slip by using a friction criterium. The fault around the southern cluster is found particularly vulnerable, and minimal pressure perturbations induced could have been sufficient to trigger seismic activity there. By contrast, the zone between the clusters is found much more stable, so that pressure perturbations, even though larger, is not enough to trigger seismicity there: this explains a spatial gap between the two clusters.