How Does CO2-EOR Work?
By injecting CO2 into already developed oil fields it mixes with and “releases” the oil from the formation, thereby freeing it to move to production wells. CO2 that emerges with the oil is separated in above-ground facilities and re-injected into the formation. CO2-EOR projects resemble a closed-loop system where the CO2 is injected, produces oil, and ultimately remains stored in the formation.
Today, most of the CO2 used in EOR operations comes from natural underground domes. With the natural supply of CO2 limited, man-made CO2 from the captured CO2 emissions of power plants and industrial facilities can be used to boost oil production through EOR. Once CO2 is captured from these facilities, it is compressed and transported by pipeline to oil fields.