Sleipner

The Sleipner CCS Project, operated by Equinor with partners Vår Energi, LOTOS, and KUFPEC, is located in the Norwegian sector of the North Sea. Since 1996, Sleipner has been injecting about 1 million tonnes of CO₂ per year into the Utsira Formation, a large saline aquifer situated roughly 800–1,000 meters below the seabed. CO₂ is separated from produced natural gas at the Sleipner T platform and then compressed and injected offshore. The Utsira reservoir has an estimated storage capacity of tens of gigatonnes, making it one of the most studied formations in Europe for long-term containment. Sleipner was the world’s first commercial offshore CCS project, and it remains a global benchmark for monitoring and verification. More than 25 years of operational data have demonstrated stable plume migration and no leakage, confirmed through 3D seismic imaging, pressure monitoring, and geochemical analysis. The project has stored over 20 million tonnes of CO₂ to date and continues to provide valuable insights for future large-scale CCS projects worldwide.