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oa Temporal Analysis of CO2 Storage Behavior in the Illinois Basin–Decatur Project
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, World CCUS Conference 2025, Sep 2025, Volume 2025, p.1 - 5
Abstract
Summary
This study analyzes well-log data from the Illinois Basin–Decatur Project to evaluate the long-term dynamics of CO2 trapping in deep saline formations. Focusing on two depth intervals (6000–6100 ft and 6500–6600 ft), it quantifies residual and soluble CO2, assesses porosity–saturation correlations, and investigates spatial heterogeneity using statistical methods. Results show a transition from structural to residual trapping at the shallower interval, low saturation at the deeper one, and near-zero correlation with porosity, contrasting with simulation models. These findings highlight the importance of depth-specific, long-term monitoring to improve the accuracy of CO2 storage assessments.
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