Speaker
Description
During geological carbon sequestration, the interaction between CO2-enriched brine and carbonate formations leads to calcite dissolution, driven by the coupled processes of fluid transport, geochemical reactions, and evolving pore structures. Clarifying how these processes influence the transition of dissolution patterns is important for understanding reactive flow behaviour in subsurface environments. This study introduces a pore-scale computational framework that combines the volumetric lattice Boltzmann method with GPU-CUDA parallelization to efficiently simulate reactive transport in both fracture-free and fracture-matrix systems, allowing detailed investigation of how the preferential flow path influences dissolution dynamics. Results indicate that increased injection velocities tend to promote preferential pathways and more spatially uniform dissolution, whereas slower flow encourages more heterogeneous dissolution behaviour. Temperature mainly affects the irregularity of the advancing dissolution front but does not substantially modify the dominant reaction patterns. Three different regimes are identified: uniform dissolution, channel widening, and face dissolution, representing dissolution pattern transitions arising from the interaction between pore morphology and pore-scale reactive transport.
| Country | United Kingdom |
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| Student Awards | I would like to submit this presentation into the Earth Energy Science (EES) and Capillarity Student Poster Awards. |
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