Journal
HEAT AND MASS TRANSFER
Volume 53, Issue 8, Pages 2637-2649Publisher
SPRINGER
DOI: 10.1007/s00231-017-2007-6
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Funding
- Engineering and Physical Science Research Council of the UK [EP/I010971/1]
- National Natural Science Foundation of China [51506110]
- China Postdoctoral Science Foundation [2015M581090]
- Shanghai Pujiang Programme [14PJ1401600]
- Fudan University Initiative Scientific Research Programme [EZH2126504]
- EPSRC [EP/I010971/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I010971/1] Funding Source: researchfish
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In this paper, the migration of supercritical carbon dioxide () in realistic sandstone rocks under conditions of saline aquifers, with applications to the carbon geological storage, has been investigated by a two-phase lattice Boltzmann method (LBM). Firstly the digital images of sandstone rocks were reproduced utilizing the X-ray computed microtomography (micro-CT), and high resolutions (up to 2.5 mu m) were applied to the pore-scale LBM simulations. For the sake of numerical stability, the digital images were cleaned by closing the dead holes and removing the suspended particles in sandstone rocks. In addition, the effect of chemical reactions occurred in the carbonation process on the permeability was taken into account. For the wetting brine and non-wetting supercritical flows, they were treated as the immiscible fluids and were driven by pressure gradients in sandstone rocks. Relative permeabilities of brine and supercritical in sandstone rocks were estimated. Particularly the dynamic saturation was applied to improve the reliability of the calculations of the relative permeabilities. Moreover, the effects of the viscosity ratio of the two immiscible fluids and the resolution of digital images on the relative permeability were systematically investigated.
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