While the Deepwater Horizon disaster of a year ago remains the main symbol of the hazards of drilling in the Gulf Mexico, another environmental danger looms in the region: some 3,200 abandoned oil and gas wells lacking any cement plugging to stop leaks.
A government list recently obtained by Associated Press reveals the abandoned, unplugged wells, some of which are 60 years old. They come in addition to 27,000 abandoned, unmonitored wells in the Gulf of Mexico previously cited by the AP that are plugged with cement but that still are considered a potentially serious threat for the environment. The uncapped wells could be even more dangerous, however, because there is little to prevent a surge of oil or gas from spilling out into the open water and damaging the surrounding ecosystem.
The roughly 3,200 unplugged wells identified by the AP come from records obtained under the Freedom of Information Act. The records provide details on the federal government’s “Idle Iron” program announced in September to plug, within three years, wells and platforms in the Gulf no longer being used for exploration or production “to substantially reduce risk hazards.”
Neither the uncapped wells nor the 27,000 plugged with cement are subjected to regular monitoring, which means that should a leak spring in any of the wells, authorities are unlikely to know until it becomes a serious problem.
Experts say the cement used to cap and line the walls of oil wells, while providing a measure of protection, are hardly a fail-safe measure. “The one thing we don’t know very much about is how the cement will age,” said Roger N. Anderson, a geophysicist at Columbia University. “Highways only last so long, and the cement starts to degrade.”
Unplugged gas and oil wells is a major problem inland as well. The Interstate Oil and Gas Commission found some 60,000 abandoned oil and gas wells in 2008, and estimated that there may be up to 1 million more around the U.S.
Related Posts:
Abandoned Oil and Gas Wells Endangering Homes, Water Supplies
Feds Direct Gulf Oil Companies to Block Unused Wells
Thousands of Abandoned Wells in the Gulf of Mexico Escape Monitoring


