I don't know about many others, I think Texas also has some, maybe some small reserves in New Mexico, but I don't know. I hear Alaska has allot, but they haven't really tapped that cause its in places where drilling might hurt the environment. =/
Tulsa was the Oil Capitol of the world (so I heard) at some point, like back in the early 1900s I think. Supposedly we're really looking into containing and using Natural Gas as that's what remains in the oil wells after the oil's been drained out, so there's allot of that still left. Of course, I've been seeing allot of solar panels while traveling from city to city and there's rumors of investing more into wind power in the western part of the state, but I don't go there much.
......I kind of thought everyone was taught this stuff, but I guess its a midwest thing? ^w^;;