Reference : Hydromechanical modelling of shaft sealing for CO2 storage
Scientific journals : Article
Engineering, computing & technology : Geological, petroleum & mining engineering
Engineering, computing & technology : Energy
Engineering, computing & technology : Civil engineering
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
Hydromechanical modelling of shaft sealing for CO2 storage
Dieudonné, Anne-Catherine mailto [Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur >]
Cerfontaine, Benjamin [Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur >]
Collin, Frédéric [Université de Liège > Département ArGEnCo > Géotechnique >]
Charlier, Robert [Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur >]
Engineering Geology
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[en] CO2 storage ; abandoned coal mines ; gas migration ; numerical modelling ; interface behaviour
[en] The geological sequestration of CO2 in abandoned coal mines is a promising option to mitigate climate changes while providing sustainable use of the underground cavities. In order to certify the efficiency of the storage, it is essential to understand the behaviour of the shaft sealing system. The paper presents a numerical analysis of CO2 transfer mechanisms through a mine shaft and its sealing system. Different mechanisms for CO2 leakage are considered, namely multiphase flow through the different materials and flow along the interfaces between the lining and the host rock. The study focuses on the abandoned coal mine of Anderlues, Belgium, which was used for seasonal storage of natural gas. A two-dimensional hydromechanical modelling of the storage site is performed and CO2 injection into the coal mine is simulated. Model predictions for a period of 500 years are presented and discussed with attention. The role and influence of the interface between the host rock and the concrete lining are examined. In addition the impact of some uncertain model parameters on the overall performance of the sealing system is analysed through a sensitivity analysis.

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