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The impact of chemical reactions on CO2 storage in geological formations: a brief review

By
C. A. Rochelle
C. A. Rochelle
British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, UKcaro@bgs.ac.uk
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I. Czernichowski-Lauriol
I. Czernichowski-Lauriol
BRGM, Avenue Claude Guillemin, BP 6009, 45060 Orleans cedex 2, France
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A. E. Milodowski
A. E. Milodowski
British Geological Survey, Kingsley Dunham Centre, Keyworth, Nottingham NG12 5GG, UKcaro@bgs.ac.uk
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Published:
January 01, 2004

Abstract

The sequestration of CO2 in the deep geosphere is one potential method for reducing anthropogenic emissions to the atmosphere without a drastic change in our energy-producing technologies. Immediately after injection, the CO2 will be stored as a free phase within the host rock. Over time it will dissolve into the local formation water and initiate a variety of geochemical reactions. Some of these reactions could be beneficial, helping to chemically contain or ‘trap’ the CO2 as dissolved species and by the formation of new carbonate minerals; others may be deleterious, and actually aid the migration of CO2. It will be important to understand the overall impact of these competing processes. However, these processes will also be dependent upon the structure, mineralogy and hydrogeology of the specific lithologies concerned and the chemical stability of the engineered features (principally, the cement and steel components in the well completions). Therefore, individual storage operations will have to take account of local geological, fluid chemical and hydrogeological conditions. The aim of this paper is to review some of the possible chemical reactions that might occur once CO2 is injected underground, and to highlight their possible impacts on long-term CO2 storage.

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Contents

Geological Society, London, Special Publications

Geological Storage of Carbon Dioxide

Shelagh J. Baines
Shelagh J. Baines
BP Exploration and Production Company, Sunbury, UK
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Richard H. Worden
Richard H. Worden
Department of Earth & Ocean Sciences, University of Liverpool, Liverpool, UK
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Geological Society of London
Volume
233
ISBN electronic:
9781862394810
Publication date:
January 01, 2004

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