leaking pen wrote:
lesse... gas, stone. you tell me?
If we are talking about oil wells, then they typically also hold natural gas which has been trapped for millions of years. The salt dome or whatever it is that traps the liquid and gas is punctured by the drill, and when they are under great pressure they come spurting out. But that seldom happens, and most of the gas remains underground. They seal the well when they are finished. I suppose the CO2 would stay down there for millions of years.
Now if you were to pump CO2 under some randomly chosen spot in the ground, I suppose it would quickly percolate out. Also, I suppose a lot of it comes out mixed with the natural gas and oil. Nowadays they force oil out by pumping water into wells, and it takes a lot of energy to separate the water from the oil.
- Jed
