The sealing is tight
– CO2 mixed with formation water does not geochemically alter the seals to such an extent that they leak, professor of geology Per Aagaard summarizes.He adds: – Although these results of the SSC Ramore project are promising, we still need more knowledge of the process involved in the sealing caprock above the CO2 reservoir to be certain that the sealing is tight and that CO2 stays in place. Now our research focus has somewhat shifted towards how the geomechanical properties change with diagenetic processes (cementation) and structural deformation processes. 7–8 years ago, when the planning of the SSC RAMORE project started, the IPCC pointed out important knowledge gaps prior to deployment of carbon capture and storage (CCS) to reduce the CO2 emissions to the atmosphere. T
o evaluate potential CO2 leakage from subsurface storage of CO2, SSC RAMORE focused on the geochemical interaction of CO2 in formation water with caprocks and with engineered materials in wells, as well as with the corresponding changes in geo-mechanical properties.Furthermore, the project carried out simulations of injected CO2 in reservoir models to improve monitoring of CO2 reservoirs, and developed a methodology for risk assessments of CO2 storage in the subsurface. Per Aagaard led the project at University of Oslo, establishing good cooperation between the research partners (UiB, IFE, NGI) and making a fundament for FME SUCCESS, where he is now scientifical leader for the Oslo group. SSC RAMORE, one of the many projects associated with SUCCESS, is now ending with its last PhD-dissertations.