In-situ experiment reveals CO₂ enriched fluid migration in faulted caprock.

ABSTRACT: The sealing characteristics of the geological formation located above a CO₂ storage reservoir, the so-called caprock, are essential to ensure efficient geological carbon storage. If CO₂ were to leak through the caprock, temporal changes in fluid geochemistry can reveal fundamental information on migration mechanisms and induced fluid-rock interactions. Here, we present the results from a unique in-situ injection experiment, where CO₂-enriched fluid was continuously injected in a faulted caprock analogue. Our results show that the CO₂ migration follows complex pathways within the fault structure. The joint analysis of noble gases, ion concentrations and carbon isotopes allow us to quantify mixing between injected CO₂-enriched fluid and

SUBMITTER: Weber UW 

PROVIDER: S-EPMC10562487 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature