Injection of carbon dioxide (CO₂) into saline aquifer for sequestration is a promising approach to mitigate the climate issue. However, reactive interactions between various CO₂–brine–rock parameters have significantly affected the CO₂ sequestration. Factors such as brine type, brine salinity, reactive pore surface area and contact time were found to significantly alter the physical rock properties. Until now, a systematic study on the dominance and degree of influence of each factor has yet to be carried out. To further understand environmental factors that impact dissolution and precipitation mechanisms, we combined the four influencing factors in static batch experiments and observed the physical changes on formation rock and ranked them according to the level of dominance by using Taguchi method. Static batch CO₂–brine–rock experiments were carried out by injecting supercritical CO₂ in an aging cell filled with brines and cubes of rock samples. The results showed that brine salinity is the most notable factor, followed by reactive pore surface area and duration of exposure. Comparison of field emission scanning electron microscope images taken before and after experiments indicated changes among potassium chloride (KCl), sodium chloride (NaCl) and calcium chloride (CaCl₂) brines resulting in dramatic changes of pore spaces because of mineral dissolution, deposited salts, and fines migration.

将二氧化碳 (CO ₂ ) 注入咸水层进行封存是缓解气候问题的一种很有前景的方法。然而，各种 CO _{2 -}卤水 - 岩石参数之间的反应相互作用显着影响了 CO ₂隔离。发现卤水类型、卤水盐度、反应孔隙表面积和接触时间等因素会显着改变岩石的物理性质。迄今为止，尚未对各因素的支配地位和影响程度进行系统研究。为进一步了解影响溶解和沉淀机制的环境因素，我们结合静态批量实验中的四个影响因素，观察地层岩石的物理变化，并采用田口方法根据优势程度对它们进行排序。通过注入超临界 CO ₂进行静态间歇式 CO _{2 -}盐水-岩石实验在充满盐水和岩石样品立方体的老化室中。结果表明，卤水盐度是最显着的因素，其次是反应孔隙表面积和暴露时间。实验前后拍摄的场发射扫描电子显微镜图像的比较表明氯化钾 (KCl)、氯化钠 (NaCl) 和氯化钙 (CaCl ₂ ) 盐水之间的变化导致由于矿物溶解、沉积盐、和罚款迁移。