re: C02 Storage Under Lake Maurepas

I work for a company that has the largest CO2 source fields and pipelines in the US. We actually drill for naturally occurring CO2 in SW Colorado, clean it, put it in a 30" pipeline and send it down to our west texas oil fields for enhanced oil recovery. Co2 injection down hole is pretty straight forward. Yes the CO2 is harsher but you just have to use the correct materials for the application such as stainless valves etc. and chrome alloy's for your casing/tubing. CO2 pipelines and injection wells for EOR are nothing new and nothing to be scared of.

However, I will say that I'm not familiar with CO2 injection into caverns for disposal/storage. I'd assume the cavern would have to have appropriate geology to ensure no seepage.

But injection wells for disposal are used for all sorts of things. For example, a lot of oil wells see naturally occurring radio activity downhole which impregnates itself into the casing. So when casing is old and pulled out of hole it cannot be used again. So there are companies that take the casing, cut it up, melt it down into a slurry and then inject the radio active material down disposal wells.