在高化物气体储存储库中使用飞增强水泥基材料的耐腐蚀性
Hong Fu1,2,3,4, Defei Chen4,5, Bao Zhang1,2,3,4
1R&D Center for Ultra Deep Complex Reservior Exploration and Development, CNPC, Korla 841000, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
飞灰通过形成弗里德尔盐和稳定的凝来提高密封材料在高盐度环境中的耐用性. 这提高了化物耐受性,降低了地质水库中长期性能的透性.
科学领域:
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 基于波特兰水泥的材料在高盐度环境中降解,影响气体储等应用中的密封性能.
- 密封材料的长期耐用性对于深层地质水库的完整性和安全性至关重要.
- 在恶劣条件下了解材料降解机制对于开发强大的密封解决方案至关重要.
研究的目的:
- 调查飞灰作为添加剂的有效性,以减轻波特兰水泥基密封材料的长期性能退化.
- 阐明飞灰增强化物耐药性和耐久性在高盐度,高温度环境中的协同作用机制.
- 为优化密封材料的理论和实验基础,为具有挑战性的地质应用提供.
主要方法:
- 在不同温度和固化期下对材料性能进行系统评估.
- 综合方法结合机械测试,微结构分析和化物迁移评估.
- 与波特兰水泥系统 (PCS) 相比,在波特兰水泥-飞灰系统 (PFS) 中量化结,孔隙结构演变和透性变化.
主要成果:
- 飞添加显著增强化物耐药性,通过促进弗里德尔盐的形成,减少化学化物结合.
- 与PCS相比,PFS中的化物入率降至26.6%.
- 波佐兰反应消耗波特兰,形成稳定的C-A-S-H凝,细化孔隙结构,并将透率降低近一个数量级.
- 在90天以后,PFS的压力强度为28.2MPa,并且在盐溶液中90°C下90天后保持了较低的内部化物含量 (0.08%).
结论:
- 飞有效地减轻了波特兰水泥基密封材料在高盐度环境中的长期性能退化.
- 这项研究阐明了飞灰修饰的协同机制,包括增强的化物结合和孔隙结构细化.
- 这些发现支持在高温,高盐度的工程环境中使用飞灰,特别是深层地质水库.
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