Assuring the integrity of offshore carbon dioxide storage

• DOI: 10.1016/j.rser.2022.112670
• Publication Date: 2022-06-11T00:26:06Z
• Authors: D.P. Connelly; J.M. Bull; A. Flohr; A. Schaap; D. Koopmans; J.C. Blackford; P.R. White; R.H. James; C. Pearce; A. Lichtschlag; E.P. Achterberg; D. de Beer; B. Roche; J. Li; K. Saw; G. Alendal; H. Avlesen; R. Brown; S.M. Borisov; C. Böttner; P.W. Cazenave; B. Chen; A.W. Dale; M. Dean; M. Dewar; M. Esposito; J. Gros; R. Hanz; M. Haeckel; B. Hosking; V. Huvenne; J. Karstens; T. Le Bas; T.G. Leighton; P. Linke; S. Loucaides; J.M. Matter; S. Monk; M.C. Mowlem; A. Oleynik; A.M. Omar; K. Peel; G. Provenzano; U. Saleem; M. Schmidt; B. Schramm; S. Sommer; J. Strong; I. Falcon Suarez; B. Ungerboeck; S. Widdicombe; H. Wright; E. Yakushev
• Keywords: Seabed; Baseline (sea)

Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore can provide up to 13% of CO2 reduction required achieve Intergovernmental Panel on Climate Change goals. The public must be assured that potential leakages from reservoirs detected therefore safely contained. We conducted controlled release 675 kg within sediments at 120 m water depth, simulate leak test novel detection, quantification attribution approaches. show even very low rate (6 day−1), in column. Alongside detection we fluxes both dissolved gaseous quantified. source was verified using natural added tracers. experiment demonstrates existing technologies techniques detect, attribute quantify any escape sub-seabed as assurance, regulatory oversight emissions trading schemes.