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Hydromechanical modelling of shaft sealing for CO2 storage

Hydromechanical modelling of shaft sealing for CO2 storage
Hydromechanical modelling of shaft sealing for CO2 storage
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.
CO2 storage, abandoned coal mines, gas migration, numerical modelling, interface behaviour
0013-7952
97-105
Dieudonné, Anne-Catherine
8cdf85bd-11ef-4dd7-b955-145c0d3efc83
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8
Dieudonné, Anne-Catherine
8cdf85bd-11ef-4dd7-b955-145c0d3efc83
Cerfontaine, Benjamin
0730daf4-9d6b-4f2d-a848-a3fc54505a02
Collin, Frédéric
27fa6a2d-f8e2-473f-a3b2-070eca6a9c3a
Charlier, Robert
3bba8221-b05d-431a-8a41-40f1b5dcc7e8

Dieudonné, Anne-Catherine, Cerfontaine, Benjamin, Collin, Frédéric and Charlier, Robert (2015) Hydromechanical modelling of shaft sealing for CO2 storage. Engineering Geology, 193, 97-105. (doi:10.1016/j.enggeo.2015.04.016).

Record type: Article

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.

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More information

Accepted/In Press date: 20 April 2015
e-pub ahead of print date: 23 April 2015
Published date: 2 July 2015
Keywords: CO2 storage, abandoned coal mines, gas migration, numerical modelling, interface behaviour

Identifiers

Local EPrints ID: 444202
URI: http://eprints.soton.ac.uk/id/eprint/444202
ISSN: 0013-7952
PURE UUID: 779562a6-81c2-4234-8787-c74c3853c058
ORCID for Benjamin Cerfontaine: ORCID iD orcid.org/0000-0002-4833-9412

Catalogue record

Date deposited: 01 Oct 2020 16:34
Last modified: 02 Oct 2020 01:53

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Contributors

Author: Anne-Catherine Dieudonné
Author: Frédéric Collin
Author: Robert Charlier

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