Dynamics of Salt Precipitation at Pore Scale During CO2 Subsurface Storage in Saline Aquifer

Dynamics of Salt Precipitation at Pore Scale During CO2 Subsurface Storage in Saline Aquifer

Lifei Yan, Rustam Niftaliyev, Denis Voskov, Rouhi Farajzadeh

This study explores the impact of salt precipitation during CO2 injection in deep saline aquifers, focusing on how it reduces injectivity. Using microfluidic experiments and advanced imaging, the research reveals two distinct types of salt crystallization, influenced by local capillary-driven flow and water film dynamics. Key factors such as surface wettability and heterogeneity also shape salt precipitation patterns. The findings provide crucial insights into pore blockage mechanisms and the relationship between water and salt saturation, advancing understanding of the salt dry-out process at the pore scale during CO2 storage.

Journal of Colloid and Interface Science, Volume 678, Part B, (2025), Pages 419-430
Corresponding Author: Lifei Yan

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