It might have in the 70s, but that was a while ago.
Funny enough we don't get any of Iraq's oil, which is managed by a European company and sold to China.
The actual reason was that Dick Cheney felt like it. There really isn't any kind of actual reason beyond that, and we didn't gain a single thing from the invasion.
Petrodollars (the foreign US dollar oil trade) are a leftover 1970s concept; they simply aren't important or a large part of support for the dollar's value. OPEC oil exports are about $300 billion a year, which isn't a lot.
Their publications (including an open letter addressed to Clinton) lay out a case for preventative (as distinct from preemptive—what we in fact did was preventative, with some bullshit to sell it as preemptive) war over concern that Saddam might do some of the stuff we lied about to claim he was already doing it.
Pure realpolitik damn-the-legality chess-playing stuff. He seems risky (to our interests in the region—who cares about his own people?) so we better depose him, that kind of thing.
https://en.m.wikipedia.org/wiki/Project_for_the_New_American...
Deaths in the war were less than you'd think. GWB actually comes out net positive in his presidency because he started PEPFAR (AIDS prevention in Africa) which was really, really good and saved millions of lives.
The Iraqis must be relieved to hear that yes, their country was destroyed but the person who started it did some random good thing in Africa.
Also, see the US President asking the Saudis for some extra pumping of oil last summer (summer of 2022, that is), supposedly that was meant to help with the gasoline prices in the US and hence with said President’s greater chances of electoral success.