Kinetic Reactive Transport Modelling of CCS Disaster Scenarios: CO2 or Brine Leakage from a CO2 Reservoir into a Freshwater Aquifer

3 Pages Posted: 4 Apr 2019 Last revised: 27 Oct 2020

See all articles by Zsuzsanna Szabó

Zsuzsanna Szabó

Eötvös Loránd University

Nóra Edit Gál

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

Éva Kun

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

Csilla Király

Eötvös Loránd University

Teodóra Szőcs

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

György Falus

Eötvös Loránd University

Abstract

Potential disaster scenarios of CO2 geological storage (CGS) are CO2 escape and brine displacement to protected freshwater aquifers via unexpected pathways. Present study evaluates the geochemical aspects of such events in the vicinity of potential CGS sites in Hungary. This is primarily possible by reactive transport modelling using the open source PHREEQC. Solution and mineral compositions, electrical conductivity and porosity are simulated in time and space. Main results predict an increase of ion-concentrations in the freshwater; some ions may even exceed drinking water limit values either in the case of CO2 and brine leakage. Finally, electrical conductivity of water is suggested to record for a cost-effective, early detection of both scenarios.

Keywords: Geochemical modelling, GHGT-14

Suggested Citation

Szabó, Zsuzsanna and Gál, Nóra Edit and Kun, Éva and Király, Csilla and Szőcs, Teodóra and Falus, György, Kinetic Reactive Transport Modelling of CCS Disaster Scenarios: CO2 or Brine Leakage from a CO2 Reservoir into a Freshwater Aquifer. 14th Greenhouse Gas Control Technologies Conference Melbourne 21-26 October 2018 (GHGT-14) , Available at SSRN: https://ssrn.com/abstract=3366417 or http://dx.doi.org/10.2139/ssrn.3366417

Zsuzsanna Szabó (Contact Author)

Eötvös Loránd University ( email )

Pazmany Peter setany 1A
Budapest, -- H1117
Hungary

Nóra Edit Gál

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

1145 Budapest, Columbus street 17-23
Budapest, 1590
Hungary

Éva Kun

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

1145 Budapest, Columbus street 17-23
Budapest, 1590
Hungary

Csilla Király

Eötvös Loránd University

Pazmany Peter setany 1A
Budapest, -- H1117
Hungary

Teodóra Szőcs

Mining and Geological Survey of Hungary - Department of Hydrogeology and Geochemistry

1145 Budapest, Columbus street 17-23
Budapest, 1590
Hungary

György Falus

Eötvös Loránd University

Pazmany Peter setany 1A
Budapest, -- H1117
Hungary

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