Geochemical Assessment of Long-Term CO 2 Storage from Core- to Field-Scale Models

Paa Kwesi Ntaako Boison (), William Ampomah (), Jason D. Simmons, Dung Bui, Najmudeen Sibaweihi, Adewale Amosu and Kwamena Opoku Duartey
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Paa Kwesi Ntaako Boison: Petroleum Engineering Department, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
William Ampomah: Petroleum Recovery Research Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Jason D. Simmons: Petroleum Recovery Research Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Dung Bui: Petroleum Recovery Research Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Najmudeen Sibaweihi: Petroleum Recovery Research Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Adewale Amosu: Petroleum Recovery Research Center, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA
Kwamena Opoku Duartey: Petroleum Engineering Department, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA

Energies, 2025, vol. 18, issue 15, 1-29

Abstract: Numerical simulations enable us to couple multiphase flow and geochemical processes to evaluate how sequestration impacts brine chemistry and reservoir properties. This study investigates these impacts during CO 2 storage at the San Juan Basin CarbonSAFE (SJB) site. The hydrodynamic model was calibrated through history-matching, utilizing data from saltwater disposal wells to improve predictive accuracy. Core-scale simulations incorporating mineral interactions and equilibrium reactions validated the model against laboratory flow-through experiments. The calibrated geochemical model was subsequently upscaled into a field-scale 3D model of the SJB site to predict how mineral precipitation and dissolution affect reservoir properties. The results indicate that the majority of the injected CO 2 is trapped structurally, followed by residual trapping and dissolution trapping; mineral trapping was found to be negligible in this study. Although quartz and calcite precipitation occurred, the dissolution of feldspars, phyllosilicates, and clay minerals counteracted these effects, resulting in a minimal reduction in porosity—less than 0.1%. The concentration of the various ions in the brine is directly influenced by dissolution/precipitation trends. This study provides valuable insights into CO 2 sequestration’s effects on reservoir fluid dynamics, mineralogy, and rock properties in the San Juan Basin. It highlights the importance of reservoir simulation in assessing long-term CO 2 storage effectiveness, particularly focusing on geochemical interactions.

Keywords: CO 2 sequestration; mineral precipitation; mineral dissolution; reactive transport modeling; geochemistry; reservoir simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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