Seal characterization for containment integrity in saline aquifer as potential storage site for CCS

Porosity and permeability values are determined based on readings obtained through He-Pycnometry. Based on the core description, three lithofacies mudstone groups identified, which are massive mudstone, heterolithic/laminated mudstone, and bioturbated mudstone. These covers the EOD ranging from LCP, LCST, TDL, ESTR, DLT and MN. A total of 35 sample measurements are taken, each representing distinct lithofacies types, EOD, and stratigraphic sequences within the entire basin. The porosity values exhibit a depth-related trend, with deeper samples generally having lower porosity. Conversely, permeability values may not be influenced by depth, with potential impacts from factors such as pore throat distribution, mineral composition, clay content, and overall connectivity. This initial screening of the shale samples serves as an assessment of containment integrity and overall quality. Typically, deeper intervals tend to exhibit lower porosity, although there may be variations in permeability (Figure 3).