Perspective of CO2 for Storage and Enhanced Oil Recovery (EOR) in Norwegian North Sea

The CO2 Storage Atlas of the Norwegian Continental Shelf has been prepared by the Norwegian Petroleum Directorate. The main objectives have been to identify safe and effective areas for long-term storage of CO2 and to avoid possible negative interference with ongoing and future petroleum activity. CO2 can be used to increase oil recovery to increase value of CO2 sequestration. CO2-EOR is a proven technology to increase oil recovery, and simultaneously store CO2 permanently in the subsurface. Today's experiences is from onshore North America and China. The technology is mature for onshore use, with 40 years of injection in the USA. Implementing CO2-EOR offshore is definitely more challenging and carries operational, commercial and financial risks. Offshore Norway we have 20 years of experience with storing CO2 in geological formations and a lot of work has been done to map and evaluate possible storage sites (CO2 Storage Atlas Norwegian Continental shelf). CO2 EOR screening studies were done to see if it could be a value to use CO2 to increase the recovery in some of the oil fields. Studies showing potentially favorable outcomes for using CO2 EOR, Figure 1 shows studied areal in NCS. Both CO2-EOR with permanent storage in the oilfields as well as CO2 without storage are studied in three cases. CO2 for EOR can create a market for CO2 that improves the economics of CCS and it can be combined with permanent storage of CO2.