Gulf of Mexico oil spill 2010: The worst-case scenario

The worst-case scenario for the broken and leaking well gushing oil into the Gulf of Mexico would be the loss of the wellhead currently restricting the flow to 5,000 barrels -- or 210,000 gallons per day.

Share If the wellhead is lost, oil could leave the well at a much greater rate, perhaps up to 150,000 barrels -- or more than 6 million gallons per day -- based on government data showing daily production at another deepwater Gulf well.
By comparison, the Exxon Valdez spill was 11 million gallons total. The Gulf spill could end up dumping the equivalent of 4 Exxon Valdez spills per week.
"Typically, a very good well in the Gulf can produce 30,000 barrels a day, but that's under control. I have no idea what an uncontrolled release could be," said Stephen Sears, chairman of the petroleum engineering department at Louisiana State University.
Thursday, federal officials said they were preparing for the worst-case scenario but didn't elaborate.

Kinks in the piping created as the rig sank to the seafloor may be all that is preventing the Deepwater Horizon well from releasing its maximum flow. BP is now drilling a relief well as the ultimate fix. The company said Thursday that process would take up to 3 months.

"I'm not sure what's happening down there right now. I have heard there is a kink in what's called the riser. The riser is a long pipe that connects the wellhead to the rig. I really don't know if that kink is a big restriction. Is that really a big restriction? There could be another restriction further down," said LSU's Sears.
"The loss of a wellhead, this is totally unprecedented," said Gouguet. "How bad it could get from that, you will have a tremendous volume of oil that is going to be offgassing on the coast. Depending on how much wind is there, and how those gases build up, that's a significant health concern."