caprock. However, the influence of shale‐total organic content (TOC) on wettability (and thus
on storage potential) has not been evaluated despite the fact that naturally occurring shale
formations can vary dramatically in TOC, and that even minute TOC strongly affects storage
capacities and containment security. Thus, there is a serious lack of understanding in terms
of how shale, with varying organic content, performs in a CO2 geo‐storage context. We …