A recent study conducted by the University of Leeds shows that porous sandstone could provide a safe storage option for carbon dioxide. The study, which analyzed data from the Miller oilfield in the North Sea, showed that sandstone reacts with injected fluids much quicker than was expected. It gives an indication that the CO2 sequestered deep underground could react quickly with the rocks to become fixed into the deep formation water.
Bruce Yardley, a Leeds professor, supervised the study. He said, "If CO2 is injected underground we hope that it will react with the water and minerals there in order to be stabilized. That way it spreads into its local environment rather than remaining as a giant gas bubble which might ultimately seep to the surface." He also added that based on his belief that the reactions would happen more quickly, it would make it less likely that the CO2 would escape