Allow me to comment(underscoring what Bob said) the reason water and CO2 is pumped into producing formations is to extract MORE oil from from the formation, not replace it, enhanced recovery they call it. Jeff, I suspect the Texan was telling you a tall tale and later joked with his buddies what he told to nosy person. I don't mean any disrespect, but hell, they don't pass an opportunity's to pull one on their buddies, the rest of the world doesn't stand a chance ;) There have been sinkholes attributed to oil production. Generally the cause is "wash out" of an area closer to the surface than the collapse of an oil formation several thousand feet down. Anyway removing CO2 from the atmosphere and pumping into a producing formation will not sequester it. As Bob mention porosity is a key feature of producing formations. Sooner or later the CO2 will migrate to a well bore and re-enter the atmosphere when the oil it associated with it is processed. As Terry mentions locking the Co2 in played out capped formations can't be totally safe. Natural Gas stored in old salt mines, years old practice, near Hutchison, KS did find a way out and cause some fires. Doug, N0LKK Kansas USA inc.
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