Static kill, which began Tuesday, will attempt to force the oil back into its reservoir. But BP won't know if static kill worked – and the Gulf oil spill is over – until it finishes its relief well.
BP launched its “static kill” operation Tuesday as part of its two-pronged effort to kill the runaway Macondo well. The goal is to push the oil back down into the reservoir below the sea floor, setting the stage for a relief well to permanently cement the well in mid-August.
BP began static kill at 4 p.m. ET. During the process, engineers will pump heavy drilling mud weighing 13 pounds a gallon into the well via a valve on the blowout preventer. That should force the lighter oil downward.
But retired Coast Guard Adm. Thad Allen, who is shepherding the federal response, said the relief well is the only way to make sure the well will no longer produce oil.
“The relief wells are the answer,” Allen said Tuesday morning in a teleconference with reporters. “This thing won’t truly be sealed until the relief wells are done.”
Static kill will help engineers glean information about the well that might help the relief-well effort. Engineers want to determine whether any oil is escaping the pipe that carries the oil from the reservoir – and if so, how. To do this, BP will slowly pump in the drilling mud and see what happens. The operation is expected to take as long as three days.