Hydromechanical impact of CO2 mineralization in basaltic rock

Greenhouse gases are the cause of global warming which is provocating climate change. Billion of tonnes of GHGs were been emitted and more will be emitted. The carbon cycle of this planet is no longer able to absorb and store the human carbon footprint, actually, we are taking huge amounts of carbon from the underground and spreading it in the atmosphere as never before. To restrict the effect of climate change and to stop the warming of the Earth negative emission technologies are needed. The IPCC states that carbon absorption and storage is how we might avoid further temperature rises. The challenges of the CCS are capturing and storage. The second one is the most delicate aspect because it concerns finding a permanent way to place this large amount of volume of gas present in the atmosphere. The injection in sedimentary rocks has been studied but the long mineral trapping seems to be an unsurmountable obstacle because it needs thousands of years for the injected CO2 to become solid and inert. On the other hand, the new technology of injection of CO2-charged seawater in basaltic rocks is yielding good results due to its fast mineralization time which is less than 2 years. How this mineralization affects the hydromechanical properties as absolute permeability is what has been studied in this report, starting from the pore network extraction and ending with the assessment of porosity reduction due to the mineralization of the CO2.