Inferring flow pathways between bedrock boreholes using the hydraulic response to borehole liner installation

Fiber Optic Pressure Measurements Open Up New Experimental Possibilities in Hydrogeology

“…Further developments of FO systems should target (1) eliminating the long-term drift to allow longterm pressure-change measurements, and (2) enabling distributed transducer/signal conditioner operation with wireless control that can be deployed at relatively distant locations. Such improvements would not only expand the time and size scales of testing methods noted above, but would enable broader applications to engineering and infrastructure (nuclear waste repositories, mines, dams, tunnels, CO 2 sequestration, fracking, geothermal, ...) such as pressure pulse testing for CO 2 leakage detection and monitoring at CCS sites (e.g., Shakiba and Hosseini 2016;Tran and Zeidouni 2018;Hosseini 2019) or in the context of hydromechanical characterization and including (deep) underground structures such as geological repositories (e.g., Beauheim et al 2014;Bishop et al 2020;Brixel et al 2020), and excavation damaged zones (e.g., Bossart et al 2002;Marschall et al 2017), or geothermal systems (e.g., Borello et al 2019;Fan et al 2020;Kittila et al 2020).…”