BP Oil Leak - Ruptured disk allows oil to seep into sea bed?

If this report turns out to be correct then there are even more serious ramifications for this oil leak in that capping the top of it won't make any difference to it leaking....

"BP PLC has concluded that its "top-kill" attempt last week to seal its broken well in the Gulf of Mexico may have failed due to a ruptured disk inside the well about 1,000 feet below the ocean floor.

The disk, part of the subsea safety infrastructure, may have ruptured during the surge of oil and gas up the well on April 20 that led to the explosion aboard the Deepwater Horizon rig,

The ruptured disk may have allowed much of the heavy drilling mud being injected into the well last week to escape into the rock formation outside of the wellbore, people familiar with BP's findings said. As a result, BP was not able to get sufficient pressure to keep the oil and gas at bay."