Don’t oil and natural gas occur in large underground lakes, or pools?
The terms oil pool and gas pool are a great source of confusion when it comes to understanding how oil and natural gas occur in the ground beneath us. Oil and gas occur in porous rocks, or reservoirs, in the ground beneath us. A complex series of natural geological processes has led to the accumulation of oil and gas in these reservoir rocks. For an introduction to this fascinating subject, please refer to our online introduction to petroleum geology. For more detailed information see our online article in the 2002 Decision Makers volume.