OH Yeah! That black stuff that comes out of the ground... Seriously though, I thought you were implying an analogous connection between Saudi-Iran as there is an important one related to the nuclear issue between Venez-Iran. No sense looking for complexity where there is none... But to your point about oil, I agree, some do have it and selling it can be very lucrative. Case in point:
...Come 'n listen to my story 'bout a man named Jed A poor mountaineer, barely kept his family fed And then one day, he was shootin' at some fooood And up through the ground come a bubblin' crude... Oil, that is, black gold, Texas tea.
Jed's family story is nearly identical to the Saudi's, just more fun to sing.
It was tongue in cheek. Both SA and Venezuela have no need for Iran's oil.