A method and apparatus are described for sequestering carbon dioxide underground by mineralizing the carbon dioxide with coinjected fluids and minerals remaining from the extraction shale oil. In one embodiment, the oil shale of an illite-rich oil shale is heated to pyrolyze the shale underground, and carbon dioxide is provided to the remaining depleted oil shale while at an elevated temperature. Conditions are sufficient to mineralize the carbon dioxide.
This invention was made under a CRADA TC02131 between American Shale Oil LLC and Lawrence Livermore National Laboratory operated for the United States Department of Energy. The Government has certain rights in this invention.