How does geological carbon sequestration work?
Geological sequestration involves injecting CO2 into appropriate rock units in the deep subsurface, generally greater than 2,500 feet deep, where it is securely stored or trapped. Our division has been researching Ohio’s CO2 sequestration capabilities since 2000 as part of the Midwest Regional Carbon Sequestration Partnership funded by the federal government. The primary attraction of geologic sequestration is the potential for direct and long-term storage of captured CO2 emissions in close proximity to large CO2 generators, such as ethanol plants and power plants. This process is illustrated in the diagram. How do you identify appropriate reservoirs for sequestration? Three primary types of rock formations can serve as reservoirs for storing CO2 underground: deep saline formations, oil and gas fields and unmineable coal seams. Deep saline formations are natural salt-water bearing intervals of porous and permeable rocks that occur beneath the level of potable groundwater. Oil and gas f
