CoachA petroleum system is a body of mature source rock together with all the oil and gas that came from it, and the elements and processes they need: the source rock, the reservoir rock, the seal and the overburden (the rocks above, which bury the source rock), and the formation of traps, the generation, migration and accumulation of oil and gas.
Earth and Space Sciences · Glossary
What is Petroleum system?
Also known as: overburden