UiO (lead), NGI, UNI Research, Colorado School of Mines, Utah State University, Western State Colorado University
Storage of CO2 is considered an important way of mitigating the global climate challenge, and the Norwegian North Sea areas may give room for a central storage for Northern Europe. In this context, COPASS targets CO2 injected into sandstones in the subsurface that will flow out from the well and into the porous rocks along certain paths. The project will analyse these flow paths. We have started to examine CO2 reservoirs that have been exhumed to the surface in Utah (USA), and combine this information with nearby sites where natural CO2 is currently leaking out. The learnings will improve our understanding of CO2 behaviour in sandstones that are found at depths of 1000–2000 meters in the subsurface. The project started in 2015 and has several US and Norwegian partners. Our goal is to make models that predict how CO2 moves and, only valid for some cases, if and how CO2 could escape the reservoir and drift up in the overlying rock succession. The gained insight will give valuable input to North Sea projects where possible new CO2 storage sites are evaluated.