Numerical investigations of foam-assisted CO2 storage in saline aquifers
نویسندگان
چکیده
CO2-foam injection is a promising technology for reducing gas mobility and increasing trapping within the swept region in deep brine aquifers. In this work, consistent thermodynamic model based on combination of Peng-Robinson equation state (PR EOS) components with an activity aqueous phase implemented to accurately describe complex phase-behavior CO2-brine system. The module combined representation foam by implicit-texture (IT) two flow regimes. This can capture complicated dynamics miscible CO2 at various stages sequestration process. Operator-Based Linearization (OBL) approach applied improve efficiency highly nonlinear problem transforming discretized conservation equations into quasi-linear form state-dependent operators. We first validate our simulation results enhanced dissolution small domain without presence capillary transition zone (CTZ). Then 3D unstructured reservoir used examine behavior its effects storage. Simulation studies show good agreement analytical solutions both cases CTZ. Besides, CTZ enhances rate brine. Foam simulations that foams reduce effectively bubbles inhibit from migrating upward gravity, which turn improves sweep opens unswept long run (post-injection), dissolution, mechanism residual trapping, due foam, may not be significant. work suggests possible strategy develop efficient storage technology.
منابع مشابه
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ژورنال
عنوان ژورنال: International Journal of Greenhouse Gas Control
سال: 2021
ISSN: ['1750-5836', '1878-0148']
DOI: https://doi.org/10.1016/j.ijggc.2021.103314