Kozuh, here's a simple experiment for you to study the origin of oil.
Experiment to determine the origin of oils:
1.) Take one pound of bacon and boil it.
2.) Observe the formation of a layer of fats, oils, and greases on the surface of the water.
3.) Now take as much of any kind of igneous or metamorphic rock you want and boil it. Report you observations.
"Our houses are such unwieldy property that we are often imprisoned rather than housed in them." - Henry David Thoreau, Walden: Economy, 1854