FIB-SEM and X-ray micro-tomographic images of carbonate rock dissolution during reactive CO2-saturated brine injection under reservoir conditions

The datasets contain FIB-SEM and X-ray micro-tomographic images of a wettability-altered carbonate rock sample before and after dissolution with reactive CO2-saturated brine at reservoir pressure and temperature conditions. The data were acquired with the aim of investigating CO2 storage in depleted oil fields that have oil-wet or mixed-wet conditions. Our novel procedure of injecting oil after reactive transport has revealed previously unidentified (ghost) regions of partially-dissolved rock grains that were difficult to identify in X-ray tomographic images after dissolution from single fluid phase experiments. The details of image files and imaging parameters are described in readme file.本数据集包含润湿性改变的碳酸盐岩样品，在储层温压条件下经反应性CO₂饱和盐水溶蚀前后的聚焦离子束扫描电子显微镜（FIB-SEM）与X射线显微断层扫描图像。本数据集的采集旨在探究油湿或混合润湿型枯竭油田中的CO₂封存问题。我们提出的反应性运移后注油新型实验流程，揭示了此前未被识别的部分溶蚀岩石颗粒"幽灵"(ghost)区域——这类区域在单相流体实验溶蚀后的X射线断层扫描图像中难以辨识。图像文件及成像参数的详细信息详见readme文档。