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Article overview
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Quantifying Multiphase Flow of Aqueous Acid and Gas CO$_2$ in Deforming Porous Media Subject to Dissolution | | Rafid Musabbir Rahman
; Carson Kocmick
; Colin Shaw
; Yaofa Li
; | | Date: |
1 Jan 2023 | | Abstract: | Mineral dissolution in porous media coupled with single- or multi-phase flows
is pervasive in natural and engineering systems including carbon capture and
sequestration (CCS) and acid stimulation in reservoir engineering. Dissolution
of minerals occurs as chemicals in the solid phase is transformed into ions in
the aqueous phase, effectively modifying the physical, hydrological and
geochemical properties of the solid matrix, and thus leading to the strong
coupling between local dissolution rate and pore-scale flow. However, our
fundamental understanding of this coupling effect at the pore level is still
limited. In this work, mineral dissolution is studied using novel calcite-based
porous micromodels under single- and multiphase conditions, with a focus on the
interactions of mineral dissolution with pore flow. The microfluidic devices
used in the experiments were fabricated in calcite using photolithography and
wet etching. These surrogate porous media offer precise control over the
structures and chemical properties and facilitate unobstructed and unaberrated
optical access to the pore flow with micro-PIV methods. The preliminary results
provide a unique view of the flow dynamics during mineral dissolution. Based on
these pore-scale measurements, correlations between pore-scale flow and
dissolution rates can be developed for several representative conditions. | | Source: | arXiv, 2301.00378 | | Services: | Forum | Review | PDF | Favorites | |
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