Monitoring Deep Geothermal Reservoirs Using Ambient Noise And Coda Wave Interferometry; A Feasibility Study At Rittershoffen

Abstract

In this study we analyze the feasibility of such noisebased monitoring techniques near the industrial site of rittershoffen installed in early 2012 and which is about to enter its operational phase in december 2016 (EcogI project). During the installation of this site, two boreholes were drilled. During summer 2014, the first borehole (Grt1) Was stimulated to enhance the permeability of the reservoir and to provide acceptable heat productivity. This stimulation was accompanied by a moderate seismicity whose most energetic event reached a magnitude ml=1.6 that could reflect a change of the medium at that time.