The capture and storage of CO2 represent a technologically viable option to reduce greenhouse gas emissions from the use of fossil fuels. The petrophysical characteristics of the storage, the type of rock, the state of the gas and the conditions of the injection process affect the development of the residual trap mechanism. In the ATAP experimental facility, supercritical CO2 was injected following two methodologies, the steady and unsteady states into three sandstone samples with different porosities and permeabilities in a triaxial cell, which reproduces a rock-brine system. The results were obtained and interpreted based on numerical adjustment models, which were made with the Cydar^™ software in the first drainage process. The results indicate the alteration of the storage wettability, which suggests a greater affinity of the rock to SCCO2. The relative permeability curves obtained by history matching and successive iterations were analyzed with Craig’s rule and compared with the SCAL (Special Core Analysis) measurements. The SCCO2 injection increases the storage capacity because of its higher density, and the reservoir rock shows more affinity to CO2 in this phase. Nevertheless, during the imbibition process, the amount of CO2 retained by capillary trapping is lower than that in a more water-wet storage.

二氧化碳的捕集与封存是减少使用化石燃料所产生的温室气体排放的技术上可行的选择。储层的岩石物理特征，岩石类型，气体状态和注入过程的条件会影响残留捕集机制的发展。在ATAP实验设施中，按照两种方法将超临界CO2（稳态和非稳态）注入到三轴单元中具有不同孔隙率和磁导率的三个砂岩样品中，从而再现了岩石-盐水系统。根据Cydar ^™制作的数值调整模型获得并解释了结果软件在第一个排水过程中。结果表明，储存的润湿性发生了变化，这表明岩石对SCCO2的亲和力更大。通过历史匹配和连续迭代获得的相对渗透率曲线用克雷格法则进行了分析，并与SCAL（特殊岩心分析）测量结果进行了比较。SCCO2注入由于密度较高而增加了存储能力，并且在该阶段储层岩石对CO2的亲和力更高。然而，在吸水过程中，通过毛细管捕集保留的CO2量要比在更水湿的存储中少。