Wow. Our experiment is off to a great start—let's see if we can finish it off sooner than expected.
Two new modeling studies are tackling simulations of long-term CO2 storage. The first examines leakage of stored CO2 from abandoned oil wells. The second attempts to simulate the big picture, starting with capture and leading to injection and storage, evaluating costs and risks of potential sites.
Both papers are published online at Environmental Science & Technology. Both simulate projects that aim to capture CO2 from power plants and store it underground in aquifers or sedimentary deposits. Pilot carbon capture and storage projects are currently underway in Germany, Norway, Canada, Algeria, and the U.S.
The first paper from the U of Bergen, Norway, and Princeton finds that abandoned wells have created a Swiss-cheese pattern of holes across North America. CO2 can escape from these wells. Undersea storage would avoid the Swiss cheese problem, the authors note. But an ocean solution is more expensive.