在盐水层中CO2地下储存期间,孔尺度上的盐沉的动态
Lifei Yan1, Rustam Niftaliyev2, Denis Voskov3
1Delft University of Technology, Department of Geoscience and Engineering, Stevinweg 1, 2628 CN Delft, the Netherlands.
Journal of colloid and interface science
|September 10, 2024
概括
在二氧化碳 (CO2) 注入深层盐水层时,盐的沉降低了注入力. 这项研究揭示了两种结晶类型和影响盐分布的因素,这对于预测二氧化碳储存性能至关重要.
科学领域:
- 地质科学和环境科学 地球科学和环境科学
- 化学工程是化学工程的重要组成部分.
- 石油工程是石油工程中的一个.
背景情况:
- 在深层盐水层中储存二氧化碳 (CO2) 是缓解温室气体排放的关键策略.
- 盐沉,由水蒸发导致干燥注入的二氧化碳,显著降低了注入性,并对长期储存提出了挑战.
- 了解盐沉的孔尺度机制及其对透性的影响,对于有效的二氧化碳储存至关重要.
研究的目的:
- 为了研究二氧化碳注入过程中盐沉和多孔介质之间的孔尺度相互作用.
- 为了阐明由盐结晶引起的孔堵塞机制.
- 建立水和盐和度之间的关系,并确定影响盐分发的因素.
主要方法:
- 进行了一系列微流体实验,模拟二氧化碳注入盐水层.
- 直接观测和详细的图像处理被用来分析盐沉模式.
- 研究了毛细血管驱动的流动和水膜在水的迁移和盐的积累中的作用.
主要成果:
- 确定了两种不同的盐结晶类型:盐水中的光滑边缘晶体和CO2-盐水接口上的粗边缘晶体.
- 在多孔领域和道之间的过渡区域观察到显著的盐积累和盐水回流.
- 证明了局部异质性和表面湿度对盐沉降模式的影响.
结论:
- 本研究提供了 CO2 注入过程中盐干燥动态的全面孔尺度分析.
- 这些发现强调了水转移机制在盐沉和注射性损失中的关键作用.
- 了解这些孔尺度过程对于优化盐水层中二氧化碳储存策略至关重要.
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