Five advection schemes are compared and evaluated in the context of biogeochemical modeling. Using three schemes of comparable quality that have been used in recent biogeochemical models, we found that new production estimates vary by as much as 30%. Test experiments are presented that explain the large discrepancies in terms of the different types of numerical errors inherent to each scheme. One scheme is suggested for eddy‐resolving models and another one for coarse resolution models.

-The Southern Adriatic Sea is one of the five prospective areas for CO 2 storage being evaluated under the FP7 European Sitechar project. The potential reservoir identified in the investigated area is represented by a carbonate formation (Scaglia Formation -Late Cretaceous). This paper shows the site characterization applied to one of the structures identified in the carbonate storage system of the South Adriatic offshore. The interpretation and analysis of seismic and borehole data allowed the construction of a 3D geological static model on both regional and local scales. Dynamic modeling was applied, adopting a sensitivity approach ( i.e. fault transmissivity, petrophysical properties of the caprock and reservoir, and different stress regimes). Coupled fluid flow and geomechanical simulation was applied to investigate the potential risk of leakage induced by mechanical solicitation on the faults occurring in the investigated area.Résumé -Évaluation et caractérisation d'un site de stockage potentiel de CO 2 au sud de la Mer Adriatique -Le sud de la Mer Adriatique est l'une des cinq zones potentielles pour le stockage du CO 2 évaluées dans le cadre du projet FP7 européen SiteChar. Le réservoir potentiel identifié dans la zone étudiée est constitué d'une formation de carbonate (Formation Scaglia -Crétacé supérieur). Cet article présente la caractérisation de site de stockage de CO 2 appliquée à l'une des structures identifiées dans les formations carbonatées du sud de la Mer Adriatique. L'interprétation et l'analyse des données sismiques et des données de forage ont permis la construction d'un modèle statique géologique 3D à des échelles régionale et locale. Une modélisation dynamique a été effectuée, intégrant une analyse de sensibilité (sur la transmittivité des failles, les propriétés pétro-physiques des roches couverture et réservoir, et différents régimes de contraintes). Une simulation couplée géomécanique et d'écoulement de fluide a été menée pour étudier le risque potentiel de fuite provoqué par les contraintes mécaniques sur les failles de la zone étudiée.

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International audienceA short term performance assessment methodology under development and validation at the In Salah CO2 storage site is presented. The progressive approach first concludes of the necessity to consider a dual media reservoir system at Krechba to fit with gas reservoir production, CO2 injection and CO2 breakthrough at an old appraisal well (Kb-5). To improve gas migration prediction while also considering the geomechanical behavior of the site, an extended geomodel has been developed. Fluid pressure simulation results representative of the dual media reservoir model and of the simple medium upper layer ones (up to the water table) are used to initiate the geomechanical modeling. Comparison of the preliminary geomechanical simulation results assuming a poro-elastic behavior and InSAR satellite surface displacement data are coherent and in the same order of magnitude (∼20 millimeters at maximum displacement)

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