Kind of on the same topic, what happens to the stability of the land on top when you pump out all the oil from a reserve? I know that sink holes are often formed when underground reservoirs of water are pumped out. The land on top of the reservoir is not as stable with air underneath it as it was with water underneath it.
I could google it, but just wondering if anyone knew if there are any theories on this.
If it makes the land on top unstable eventually, it could reallly help our war on terrorism if you KWIM.
