Quote:
Originally Posted by Fuzz
Injecting into depleted gas reservoirs seems to make sense to me. We know what the original reservoir pressures are, so logically(and I'm not a reservoir engineer) you should be able to safely inject and "refill" those reservoirs staying below the original pressures as long as you do it at a safe rate. Given the natural gas was stored for millions of years, the CO2 should also be safe.
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You’re more likely to inject CO2 into a Precambrian reservoir. Old gas reservoirs aren’t good “storage” candidates.