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oa Long-Term Migration of Line-Drive Injected CO2 in Sloping Aquifers
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, World CCUS Conference 2025, Sep 2025, Volume 2025, p.1 - 6
Abstract
Reasonably accurate estimates of plume migration using analytical approximations are valuable during early stages of storage site assessment. In this study, we consider CO2 injected through a line-drive well array in a sloping aquifer. We present an analytical model for long-term migration that, in an approximate manner, accounts for residual and dissolution trapping mechanisms. The model offers mechanistic insights into the interaction between trapping mechanisms and the relative contribution of each. Simplified expressions are derived to estimate key metrics for initial screening, including ultimate migration distance, its corresponding time, and mean migration distance. A brief discussion on the practical implications and limitations is provided, followed by application to two aquifers.