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September 17, 2025

Geochemical Interpretation of In-Situ Carbonated Brine-Sandstone Interaction: Implications for CO2 Geo-Sequestration

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Authors

DADuraid Al-BayatiUniversity of KirkukADAli H. DohanRNRyan NobleCommonwealth Scientific and Industrial Research Organisation

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Overview

Experimental analysis reveals mineral dissolution impact on petrophysical properties in Berea sandstone, highlighting the importance of geochemical modeling.

Key Points

  • Measurable decrease in permeability (~5%) due to mineral dissolution during CO2 geo-sequestration in sandstone.
  • Geochemical modeling indicated calcite and albite dissolution, with pH dropping from 8.5 to ~4.5 as CO2 concentration increased.
  • A slight increase in porosity (~0.29%) was observed, resulting from the breakdown of clay and carbonate minerals.
  • Proper input parameter selection in geochemical models is crucial for accurate predictions of mineral dissolution effects.

Cite This Study

Al-Bayati et al. (2025) studied this question.

synapsesocial.com/papers/68d4567431b076d99fa5be86https://doi.org/10.2118/227037-ms
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