A Known Risk: How Carbon Stored Underground Could Find Its Way Back Into the Atmosphere
Generous federal tax credits are driving the onrush of carbon capture and storage projects being proposed in the U.S. But like a game of whack-a-mole, there’s a chance the planet-warming emissions could seep back up into the atmosphere after they are injected underground.
How? Through any one of the thousands of abandoned oil and gas wells throughout the country. Louisiana alone has 4,500 abandoned wells and more than 21,000 inactive wells. Nationwide, there could be as many as 3 million such wells. Despite the numerous “holes” in the ground, companies including Occidental Petroleum, Denbury and Blue Sky are rushing to purchase the underground spaces, generally deep underground, and sometimes in the spaces that once held oil and gas.
Related Knowledge Center: Carbon capture
The federal government is investing heavily in the development of carbon capture and storage (or sequestration), which offers the enticing prospect of preventing carbon dioxide emissions produced during combustion from entering the atmosphere and contributing to climate change. But the technologies involved, while proven, remain expensive, an obstacle to widespread adoption.