在盐洞穴中描述和评估泄漏机制
Mojtaba Ghaedi1, Raoof Gholami2
1Department of Energy Resources, University of Stavanger, Stavanger, Norway. mojtaba.ghaedi@uis.no.
Scientific reports
|January 2, 2025
概括
从盐洞中泄漏的是最小的,在30年内损失的仅为0.36%. 了解气体流动机制是安全地下储存和防止大量损失的关键.
科学领域:
- 地质技术工程 地质技术工程
- 储能 储能 储能 储能 储能 储能
- 材料科学 材料科学 材料科学
背景情况:
- 盐洞穴对地下储存气有很大的希望.
- 对泄漏的准确评估对于安全性和效率至关重要.
- 盐岩的多孔结构影响了气体迁移.
研究的目的:
- 开发一个模型来评估通过盐洞壁的气泄漏.
- 为了分析考虑各种气体运输机制的气流.
- 在现实的储存条件下量化潜在的气损失.
主要方法:
- 模拟盐岩作为曲的纳米毛细管.
- 使用一个统一的气体流量模型,适用于所有Knudsen数.
- 应用有限差异近似来解决流量公式.
- 对模型与实验数据进行验证.
主要成果:
- 在各种条件下,滑流量是显著的.
- 超过30年的累积气泄漏率估计为0.36%.
- 泄漏的可以在低压期间流回洞穴.
- 在低压/紧密岩石时,扩散占主导地位;在高压时,粘性流动.
- 间层和工作压力增加显著影响气损失.
结论:
- 拟议的模型准确地预测了盐洞穴中的泄漏.
- 气泄漏率一般较低,但对工作压力和盐岩特性敏感.
- 了解流量模式对于优化储存安全性和容量至关重要.
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