Capturing and storing CO2

Since June 2008 and for the first time on European soil, CO2 has been pumped into the underground rock strata at the Ketzin pilot site and thus securely and permanently stored. The schematic profile section shows the boreholes for injecting the CO2 (Ktzi 201) and for monitoring the CO2 expansion (Ktzi 200 and Ktzi 202). Up to April 2010, 34,000 tonnes of food-grade CO2 were injected underground via the injection borehole. The CO2 was injected securely and without any problems. The scientific monitoring of the CO2 storage encompasses measurements in the injection borehole and the two monitoring boreholes, monitoring of the CO2 expansion from the surface and analyses of underground rock samples, gases and liquids. ©GFZ-Potsdam