EOR (CO2 used for oil extraction from depleted reservoirs) is tiny compared with utility-scale CO2 storage from America's coal fleet. The lifetime emissions of a single coal plant would require the pore space of a giant oil field (4.1 billion barrels). So EPA's dream of CCS depends on storage of supercritical CO2 in deep saline formations, which petroleum engineering experts deem "profoundly non feasible." Extrapolating EOR to CCS is a mistake.
Pore space in deep saline formations is full of high pressure brine that is very salty. If indeed it is possible to cram supercritical CO2 into rocks, where does the displaced brine go? Buoyant and fizzy from CO2 injection, eventually brine is going to wind up in the fresh groundwater that American agriculture depends on. And fugitive plumes of CO2 will erupt and kill people.
Coal is worth saving because, until scalable cold fusion is discovered, coal will be the only way to meet baseload power demand in China and India. Non-hydro renewables (wind, solar, biofuels, and geothermal) are midgets that can never scale to supplant coal. But coal can't be saved by chemical capture and underground dumping of CO2. Some other form of CCS might work, if DOE and EPA would look for it.