Well, the only reason to do that is to combust those products to create energy, right? If you want to bury the oil or coal as a means of carbon sequestration,

Well, the only reason to do that is to combust those products to create energy, right? If you want to bury the oil or coal as a means of carbon sequestration, well I suppose you could do that with wood instead, but if people really want to stablilize atmospheric CO2, the first step is to stop using fossil fuels entirely.