Hydromechanical modelling of shaft sealing for CO2 storage

Anne-Catherine Dieudonné, Benjamin Cerfontaine, Frédéric Collin, Robert Charlier

Research output: Contribution to journalArticle

7 Citations (Scopus)
190 Downloads (Pure)

Abstract

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.
Original languageEnglish
Pages (from-to)97-105
Number of pages9
JournalEngineering Geology
Volume193
Early online date23 Apr 2015
DOIs
Publication statusPublished - 2 Jul 2015

Keywords

  • CO2 storage
  • abandoned coal mines
  • gas migration
  • numerical modelling
  • interface behaviour

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