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The relevance of dawsonite precipitation in CO2 sequestration in the Mihályi-Répcelak area, NW Hungary

By
Csilla Király
Csilla Király
1
Lithosphere Fluid Research Lab, Department of Petrology and Geochemistry, Eötvös University, Budapest, Hungary. H-1117, Budapest, Pázmány Péter sétány 1/c, Hungary
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Eszter Sendula
Eszter Sendula
1
Lithosphere Fluid Research Lab, Department of Petrology and Geochemistry, Eötvös University, Budapest, Hungary. H-1117, Budapest, Pázmány Péter sétány 1/c, Hungary
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Ágnes Szamosfalvi
Ágnes Szamosfalvi
2
Geological and Geophysical Institute of Hungary, H-1143 Budapest, XIV., Stefánia út 14, Hungary
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Réka Káldos
Réka Káldos
1
Lithosphere Fluid Research Lab, Department of Petrology and Geochemistry, Eötvös University, Budapest, Hungary. H-1117, Budapest, Pázmány Péter sétány 1/c, Hungary
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Péter Kónya
Péter Kónya
2
Geological and Geophysical Institute of Hungary, H-1143 Budapest, XIV., Stefánia út 14, Hungary
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István J. Kovács
István J. Kovács
2
Geological and Geophysical Institute of Hungary, H-1143 Budapest, XIV., Stefánia út 14, Hungary
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Judit Füri
Judit Füri
2
Geological and Geophysical Institute of Hungary, H-1143 Budapest, XIV., Stefánia út 14, Hungary
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Zsolt Bendő
Zsolt Bendő
1
Lithosphere Fluid Research Lab, Department of Petrology and Geochemistry, Eötvös University, Budapest, Hungary. H-1117, Budapest, Pázmány Péter sétány 1/c, Hungary
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György Falus
György Falus
2
Geological and Geophysical Institute of Hungary, H-1143 Budapest, XIV., Stefánia út 14, Hungary
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Published:
January 01, 2018

Abstract:

A natural CO2 reservoir system with a sandstone lithology in NW Hungary has been studied due to its similarities to a large saline reservoir formation that is widespread in the the Pannonian Basin (Central Europe) and is suggested to be one of the best candidates for industrial CO2 storage. A range of analytical techniques has been used on core samples from CO2-containing sandstone layers that represent a wide range of pressures (90–155 bar), temperatures (79–95°C) and pore fluid compositions (total dissolved solids between 18 000 and 50 700 mg l−1) to identify the mineralogy and textural characteristics of the natural reservoir.

The only clear CO2-related feature in the studied lithology was the occurrence of dawsonite (NaAlCO3(OH)2) in a close textural relationship with albite. This is in clear agreement with our geochemical modelling results, which also underline the presence of albite as a precondition for the crystallization of dawsonite at the given PTX conditions. Our results suggest that, at least in the Pannonian Basin, dawsonite may be an important mineral for the safe sequestration of industrial CO2 in the subsurface.

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Contents

Geological Society, London, Special Publications

Reservoir Quality of Clastic and Carbonate Rocks: Analysis, Modelling and Prediction

P. J. Armitage
P. J. Armitage
BP Upstream Technology, UK
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A. R. Butcher
A. R. Butcher
Geological Survey of Finland, Finland
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J.M. Churchill
J.M. Churchill
Shell UK Ltd, UK
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A.E. Csoma
A.E. Csoma
MOL Group Exploration, Hungary
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C. Hollis
C. Hollis
University of Manchester, UK
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R. H. Lander
R. H. Lander
Geocosm, USA
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J. E. Omma
J. E. Omma
Rocktype, UK
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R. H. Worden
R. H. Worden
University of Liverpool, UK
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The Geological Society of London
Volume
435
ISBN electronic:
9781786202901
Publication date:
January 01, 2018

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