Interesting! So the Saudi's, at enormous expense, are getting deep water rigs to go do exploration with in very challenging conditions. Is this how people behave when they have 460 billion barrels in proven reserves in their existing fields already?
Here! Here!
Yeah, that was my first thought, too.  

Some people suspect what the Saudis want to do is exploit a known deepwater field that lies mostly in Iraqi territory.  Obviously, if you're going to do it, the time is now...when the U.S. military is there to protect your operations.  

But this field is not that big, so even if this theory is true, it suggests the Saudi reserves are not what they claim.