[Elsiejay]

“Can you explain more what you are looking for?

You talk about a process for production and for locational concentration of deposits?

Oil and gas are always sourced to sedimentary basins. Does that help?”

---

I wish to have an explanation, admittedly theoretical, from scientists that have studied and pondered this matter, as to how petroleum was/is “formed,” and how it became locationally concentrated. What evidence is there of its derivation from the bodies of once-living creatures, and what were the transformative processes that drove it? No doubt there exists textbooks and journal articles relating the relevant deductions of inquiring scientific minds, and how they reached the conclusions that they did.

[Smokin' Joe]

I haven't had much time to check this site out, but it might get you started petroleumgeology.org

[thackney]

I wish to have an explanation, admittedly theoretical, from scientists that have studied and pondered this matter, as to how petroleum was/is “formed,”

It is only theoretical to those that wish for a magic method of earth pumping out oil without regard to the laws of physics. Those that actually have to produce oil & gas for a living instead of just talk about it usually understand. We don't just drill anywhere and hope; there is plenty of sciences in searching for petroleum.

How detailed do you want to go?

This?
http://www.eia.gov/kids/energy.cfm?page=oil_home-basics

Or this?
http://www.petroleumgeology.org/sedstrat.cfm

Do you understand how sedimentary rock is formed and why it is different from igneous rock? This is a very basic part of understanding the formation of petroleum fields.

[Smokin' Joe]

Exploration and Production Geology (Note the links at the bottom of the home page, too--they will lead you to more than an evening's worth of reading.

Wikipedia