Carbonated smart water (CSMW) injection has drawn considerable interest, especially in the last decade. This interest stems from its results in the recovery factor enhancement and the storage of carbon dioxide. This method has been mainly studied for sandstone formations, and less devotion has been given to carbonates, especially in naturally fractured reservoirs. This paper examines the effect of the CSMW on the recovery factor in carbonate homogenous and fractured reservoirs and investigates the most effective mechanisms. Furthermore, the capability of the CSMW to store the CO₂ in the reservoir has been tested. This work has been established based on core flooding experimental data, using a compositional simulator, and extending the core results to a pilot model. The composition and salinity values of the CSMW have been specified using optimization and sensitivity analysis tools. Geochemical reactions and CO₂ solubility in the CSMW have been simulated using the PHREEQC.

中文翻译：

---

碳酸盐岩储层碳酸化智能水机理研究

碳酸智能水 (CSMW) 注入引起了相当大的兴趣，尤其是在过去十年中。这种兴趣源于其在提高回收率和储存二氧化碳方面的结果。该方法主要针对砂岩地层进行研究，对碳酸盐岩的研究较少，尤其是在天然裂缝性储层中。本文研究了 CSMW 对碳酸盐岩均质和裂缝性储层采收率的影响，并研究了最有效的机制。此外，CSMW 储存 CO _{2 的能力}在水库中进行了测试。这项工作是基于岩心驱油实验数据、使用成分模拟器并将岩心结果扩展到试点模型而建立的。CSMW 的组成和盐度值已使用优化和灵敏度分析工具指定。已使用 PHREEQC 模拟了 CSMW 中的地球化学反应和 CO ₂溶解度。