Home > Publications database > Observational evidence confirms modelling of the long-term integrity of CO2-reservoir caprocks > print |
001 | 824282 | ||
005 | 20240619092011.0 | ||
024 | 7 | _ | |a 10.1038/ncomms12268 |2 doi |
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100 | 1 | _ | |a Kampman, N. |0 P:(DE-HGF)0 |b 0 |
245 | _ | _ | |a Observational evidence confirms modelling of the long-term integrity of CO2-reservoir caprocks |
260 | _ | _ | |a London |c 2016 |b Nature Publishing Group |
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520 | _ | _ | |a Storage of anthropogenic CO2 in geological formations relies on a caprock as the primary seal preventing buoyant super-critical CO2 escaping. Although natural CO2 reservoirs demonstrate that CO2 may be stored safely for millions of years, uncertainty remains in predicting how caprocks will react with CO2-bearing brines. This uncertainty poses a significant challenge to the risk assessment of geological carbon storage. Here we describe mineral reaction fronts in a CO2 reservoir-caprock system exposed to CO2 over a timescale comparable with that needed for geological carbon storage. The propagation of the reaction front is retarded by redox-sensitive mineral dissolution reactions and carbonate precipitation, which reduces its penetration into the caprock to ∼7 cm in ∼105 years. This distance is an order-of-magnitude smaller than previous predictions. The results attest to the significance of transport-limited reactions to the long-term integrity of sealing behaviour in caprocks exposed to CO2. |
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700 | 1 | _ | |a Bertier, P. |0 0000-0003-1770-412X |b 2 |
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700 | 1 | _ | |a Evans, J. P. |0 P:(DE-HGF)0 |b 9 |
700 | 1 | _ | |a Maskell, A. |0 P:(DE-HGF)0 |b 10 |
700 | 1 | _ | |a Chapman, H. J. |0 P:(DE-HGF)0 |b 11 |
700 | 1 | _ | |a Bickle, M. J. |0 P:(DE-HGF)0 |b 12 |e Corresponding author |
773 | _ | _ | |a 10.1038/ncomms12268 |g Vol. 7, p. 12268 - |0 PERI:(DE-600)2553671-0 |p 12268 - |t Nature Communications |v 7 |y 2016 |x 2041-1723 |
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