Passive Seismic Monitoring of Fluid Injection at the Longyearbyen CO2-Lab, Svalbard

yen is considered physically open, and, therefore, will likely experience drift of the injected CO2 towards the Northeast, through gradual mixing and expulsion of saline groundwater. This offers a unique opportunity for studying the behavior of CO2 in subsurface saline aquifers. Six slim-hole wells have been drilled so far and several new monitoring wells are planned in what becomes a “well park”. In this study, we try to use induced seismicity to monitor the injection fluid in the test site. A precise estimation of the location and magnitude of the microearthquake will be important to investigate the link between the injection and the sudden stress release as a microearthquake. In addition, the spatial and temporal patterns of the occurrences of microearthquakes might help us better constrain the migration pattern of the injected fluid.