碳酸盐岩中的反应性CO2流动的时间动力学:4D同步成像的洞察力
Azibayam J Amabogha1, Amin Taghavinejad1, Waleed Dokhon2
1James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
概括
这项研究可视化了碳酸盐岩中的活性二氧化碳 (CO2) 运输,揭示了碳酸如何导致形成损伤. 溶解增加了多孔性和毛孔连接性,略微降低了二氧化碳捕获效率.
科学领域:
- 地质化学 地质化学
- 石油工程是石油工程中的一个.
- 材料科学 材料科学 材料科学
背景情况:
- 碳酸盐储库对于石油和天然气储存至关重要.
- 了解活性二氧化碳运输对于碳捕获和储存 (CCS) 和增强石油回收 (EOR) 至关重要.
- 在二氧化碳注入过程中形成的碳酸可以改变岩石的特性,并影响水库的性能.
研究的目的:
- 为了可视化和量化碳酸盐岩中反应性二氧化碳传输的孔尺度动态.
- 研究碳酸诱导溶解对孔隙结构和透性的影响.
- 评估溶解对二氧化碳捕获效率的影响.
主要方法:
- 四维 (4D) 高分辨率同步成像用于实时可视化.
- 在碳酸盐岩样本中注入了CO2和盐水,并进行了现场扫描.
- 在细分图像上进行孔网建模,以模拟流体流动.
主要成果:
- 观察到一种道化溶解模式,导致孔隙性增加和孔隙结构改变.
- 孔连接在溶解后显著增加.
- 模拟显示毛细血管进入压力降低,并且由于更宽,更连接的毛孔,二氧化碳捕获效率略有下降.
结论:
- 反应性CO2运输显著改变碳酸盐岩的孔隙结构.
- 增加孔隙连接性提高了透性,但降低了二氧化碳捕获效率.
- 这些发现对于优化碳酸盐储库中CCS和EOR操作至关重要.
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