Comprehensive Parametric Study of CO2 Sequestration in Deep Saline Aquifers
Comprehensive Parametric Study of CO2 Sequestration in Deep Saline Aquifers
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DOI：
10.1016/j.ces.2024.119734
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发表时间：
2024-01
影响因子：
4.7
通讯作者：
Aaditya Khanal;Md Irfan Khan;Md Fahim Shahriar
中科院分区：
文献类型：
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作者：
Aaditya Khanal;Md Irfan Khan;Md Fahim Shahriar
在深层咸水层中注入二氧化碳是永久封存人为二氧化碳的关键方法。本研究采用反应输运模型来探索矿物沉淀/溶解及其对深层咸水层储层性质的影响。我们还评估了各种二氧化碳捕集机制的毛细管压力和相对渗透率滞后。这项研究的结果揭示了初始盐水成分对矿物沉淀/溶解的显着影响。与整个储层相比，井筒周围矿物的溶解和沉淀具有不同的影响。此外，盐浓度（Ca++ 和 Mg++）和石英表面积影响 CO2 矿化，而 Na+ 影响石盐沉淀，改变储层流动特性。毛细管压力的影响是显着的，因为在模拟情况下考虑毛细管压力会显着改善二氧化碳捕集，在大约 300 年内实现注入的二氧化碳几乎完全溶解。这项研究为储层矿物、盐水性质和注入的二氧化碳之间的相互作用提供了新的见解。
Carbon dioxide injection in deep saline aquifers is a key method for permanently sequestering anthropogenic CO2. This study employs a reactive transport model to explore mineral precipitation/dissolution and its impact on reservoir properties in deep saline aquifers. We also assess capillary pressure and relative permeability hysteresis on various CO2trapping mechanisms. Results from this study reveal the significant influence of initial brine composition on mineral precipitation/dissolution. The dissolution and precipitation of minerals have different effects around the wellbores compared to the overall reservoir. Additionally, salt concentration (Ca++and Mg++) and quartz surface area affect CO2mineralization, while Na+impacts halite precipitation, altering reservoir flow properties. The effect of capillary pressure is significant, as including the capillary pressure in the simulation case resulted in significantly improved CO2trapping, achieving almost total dissolution of the injected CO2in around 300 years. This study offers novel insights into the interactions of reservoir minerals, brine properties, and the injected CO2.