Geologists go to the same schools everyone else does, and they too are fed what science 'thinks'. However, as with everything else, the schools of thought 'evolve' into a new thought. Of course, it's politically incorrect to say that what science thought was WRONG. It maintains credibility to say, we update as we learn.
It can take years for new findings to make their way into current theory.
I think oil is something that gets squeezed up from deep earth, collects in available spaces and bumps into organic matter along the way in addition to organic matter being shoved in by contamination of drilling equipment. I mean, it's not necessary to sterilize the equipment.
There was a recent development regarding the algae theory..turned out to be minerals.
As an American you have the right to not believe in guns. You also have the right to not believe in God. But if someone is trying to break into your home, or wants to harm you, the first thing you will do is pick up the phone and call someone with a gun. The second thing you will do is pray that they get there in time. ~Don Moore