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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/hess-2020-525
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2020-525
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  12 Nov 2020

12 Nov 2020

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This preprint is currently under review for the journal HESS.

Probabilistic assessment of field-scale CO2 generation by Carbonate/Clay Reactions in sedimentary basins

Giulia Ceriotti1, Claudio Geloni2, Matilde Dalla Rosa2, Alberto Guadagnini1,3, and Giovanni Porta1 Giulia Ceriotti et al.
  • 1Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza L. Da Vinci 32, 20133 Milano, Italy
  • 2Eni S.p.A.-Upstream and Technical Services, via Emilia, 1 20097 San Donato Milanese (MI), Italy
  • 3Department of Hydrology and Atmospheric Sciences, University of Arizona, Tucson, Arizona, USA

Abstract. This work explores the probabilistic assessment of CO2 generation rate and CO2 source location by occurrence of Carbonate/Clay Reactions (CCRs) in three-dimensional realistic sedimentary basins. We ground our assessment on the methodology proposed for a mono-dimensional case study and a single CCR formulation by Ceriotti et al. (2017) which includes a framework to account for thermodynamic parameter uncertainties. This methodology is here extended to a realistic three-dimensional sedimentary basin case study and transferred to encompass different types of CCRs, including two newly formulated CCRs which accounts for minerals typically observed in sedimentary environments. While testing the ability of the chosen procedure to model diverse CCRs in three-dimensional realistic subsurface sedimentary systems, we quantitatively compare the impact of CCR formulation on the spatial distribution of CO2 source location, temperature and pressure compatible to CO2 gaseous generation, and CO2 generation rate in three-dimensional environments characterized by complex and non-uniform stratigraphy. Application of the procedure to different types of CCRs enables us to provide an insight on the impact of mineralogical composition on the mechanism of activation temperature and pressure and the amount of CO2 released by the different CCR mechanisms. Finally, we show the implementation of the proposed probabilistic framework to define scenarios associated with different levels of probability to be used as the input and boundary conditions for CO2 migration and transport models in the subsurface.

Giulia Ceriotti et al.

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Probabilistic assessment of field-scale CO2 generation by Carbonate/Clay Reactions in sedimentary basins Ceriotti Giulia, Geloni Claudio, Dalla Rosa Matilde, Guadagnini Alberto, and Porta Giovanni https://data.mendeley.com/datasets/nmbzst46jm/draft?a=0c3d3bc7-4d9b-4a7d-911b-e5dcfdb31b86

Giulia Ceriotti et al.

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