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- W2604766730 abstract "When reactive fluids flow through a dissolving porous medium, conductive channels form, leading to fluid breakthrough. This phenomenon is important in geologic carbon storage, where the dissolution of CO2 in water increases the acidity and produce microstructures significantly different from those in an intact reservoir. We demonstrate the controlling mechanism for the dissolution patterns in natural porous materials. This was done using numerical simulations based on high resolution digital models of North Sea chalk. We tested three model scenarios, and found that aqueous CO2 dissolve porous media homogeneously, leading to large breakthrough porosity. In contrast, CO2-free solution develops elongated convective channels in porous media, known as wormholes, and resulting in small breakthrough porosity. We further show that a homogeneous dissolution pattern appears because the sample size is smaller than the theoretical size of a developing wormhole. The result indicates that the presence of dissolved CO2 expands the reactive subvolume of a porous medium, and thus enhances the geochemical alteration of reservoir structures and might undermine the sealing integrity of caprocks when minerals dissolve." @default.
- W2604766730 created "2017-04-14" @default.
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- W2604766730 creator A5033294068 @default.
- W2604766730 creator A5063514619 @default.
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- W2604766730 date "2017-07-06" @default.
- W2604766730 modified "2023-09-27" @default.
- W2604766730 title "Dissolved CO<sub>2</sub> Increases Breakthrough Porosity in Natural Porous Materials" @default.
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- W2604766730 doi "https://doi.org/10.1021/acs.est.7b02157" @default.
- W2604766730 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28622466" @default.
- W2604766730 hasPublicationYear "2017" @default.
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