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Aquifer-CO2 leak project. Effect of CO2-rich water percolation in porous limestone cores: Simulation of a leakage in a shallow carbonate freshwater aquifer

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSEGURA, David
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCEREPI, Adrian
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLOISY, Corinne
IDREF: 155424866
dc.date.accessioned2025-04-23T12:56:00Z
dc.date.available2025-04-23T12:56:00Z
dc.date.issued2024-07
dc.identifier.issn0009-2541en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/206371
dc.description.abstractEnCarbon capture and storage (CCS) is a promising technology for reducing greenhouse gas emissions, however, leakage of CO2 constitutes a major concern for aquifers. Despite abundant literature on petrophysical and geochemical changes at storage conditions, few studies address the impact of CO2 leakage on petrophysical and at aquifer-like pressures, flow rates and temperatures. The aim of the paper is to study and quantify at the core scale, the effects of various factors, including flow rates, fluid salinities, CO2 concentrations and limestone carbonate facies, on the petrophysical and geochemical parameters of a carbonate freshwater aquifer during an experimental CO2 leakage. To achieve this, successive CO2-rich water percolation experiments were performed at the core scale, while monitoring changes in petrophysical parameters and water chemistry. During our experiments, initial permeability increments were observed for both rock samples, followed by decreases in later experiments. Evidence of pore clogging and wormholes was also observed. It was found that the transport of particles led to significant porosity creation. The water monitoring sensors were sensible to the experimental leakage conditions, particularly electrical conductivity. The results of this study contribute to the understanding of petrophysical changes in carbonate aquifer systems by anticipating which type of aquifers are more vulnerable to dissolution and to what extent the CO2 leakage conditions modify the petrophysical parameters.
dc.language.isoENen_US
dc.subject.enCO2 leakage
dc.subject.enCarbonate freshwater reservoir
dc.subject.enPetrophysical properties
dc.subject.enWater-rock interactions
dc.subject.enCarbonate dissolution
dc.subject.enCO2 geological storage
dc.title.enAquifer-CO2 leak project. Effect of CO2-rich water percolation in porous limestone cores: Simulation of a leakage in a shallow carbonate freshwater aquifer
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.chemgeo.2024.122105en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalChemical Geologyen_US
bordeaux.page122105en_US
bordeaux.volume657en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamGEOLSEDen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcecrossref
hal.identifierhal-05044219
hal.version1
hal.date.transferred2025-04-23T12:56:02Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcecrossref
dc.rights.ccPas de Licence CCen_US
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