Saudi Arabia is creating an independent 35,000 strong force specifically to guard oil infrastructure. Here's the link via The Oil Drum.
The kingdom started recruiting and training the industrial security force a year ago, after a failed al Qaeda attack on the world's largest oil processing plant at Abqaiq in February 2006.Look at the trouble in Nigeria (not to mention the stellar production records for Iraq for the last few years.)
...Al Qaeda's Saudi-born leader, Osama bin Laden, has called for it to take aim specifically at oil.
"There is a new threat to oil installations from terrorists that has to be confronted," Interior Ministry spokesman General Mansour al-Turki told Reuters.