在真实岩石中直接数值模拟CO2的反应性溶解:在排水过程中毛细血管数量和湿度的影响
Yongfei Yang1,2, Sining Zhang1,2, Yingwen Li3
1State Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|August 21, 2025
概括
了解地质层中的二氧化碳注入是碳捕获的关键. 这项研究揭示了毛孔结构,毛细血管数量和可湿性如何影响反应溶解和化学变化.
科学领域:
- 地质化学
- 地质工程
- 环境科学
背景情况:
- 地质碳捕获需要了解二氧化碳与岩石之间的相互作用.
- 孔尺度的动态决定了大规模的封存效率.
研究的目的:
- 在二氧化碳注入过程中研究动态反应溶解.
- 分析毛细血管数量和湿度对地化学反应的影响.
- 描述化学物种在复杂毛孔结构中的演变.
主要方法:
- 孔尺度模拟合双相流,多元件运输和地化学反应.
- 分析化学成分的时间和空间演变 (CO2,CO3^2-,HCO3^-,H+).
- 开发平均pH演变的经验公式.
主要成果:
- 孔隙结构异质导致不均的反应溶解和多样化的水化学反应.
- 快速降低pH值导致酸性状况,可变的CO3^2和溶解的CO2分布.
- 毛细血管数量和湿度通过改变双相接口行为显著影响反应溶解.
结论:
- 孔径过程对二氧化碳封存的地球化学产生了重大影响.
- 动态反应溶解由流量条件和可湿度调节.
- 了解这些孔尺度现象对于预测水库行为和优化封存策略至关重要.
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