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This is a Experimental Study study.

October 16, 2025Water Resources ResearchOpen Access

Mechanistic Investigation of Salt Precipitation Induced by Supercritical CO2 in Saline Aquifers

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Static high-temperature experiments reveal how supercritical CO2 alters pore structure and wettability, indicating potential mitigation strategies.

Supercritical CO2 significantly enhances salt crystallization in saline aquifers, reducing pore volume by 15%-20%.
The study reveals a coupled mechanism involving interfacial dehydration and acid-driven water-rock interactions.
NMR and other methods indicated a dramatic wettability shift from hydrophilic to hydrophobic during salt precipitation.
The findings suggest multi-dimensional strategies for improving CO2 injection stability and long-term storage security.

Wang et al. (2025) studied this question.

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Static high-temperature experiments reveal how supercritical CO2 alters pore structure and wettability, indicating potential mitigation strategies.