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An open-source toolbox for curvature capture in porous media
No full textInternational audienceTomography is a central and essential starting point for Digital Rock Physics (DRP) and more generally, in the study of multiphase flow in porous media. The flow of coexisting fluids in the porous media is highly sensitive to contact angles between phases. Consequently, it is then important to design a tool that is simple to use to enable the extraction of global and localized angles between any pairs of labeled phases
Ifigenia la primera de muchas
No full textInternational audienceEl presente artículo analiza la reinterpretación del mito de Ifigenia desde una perspectiva feminista, destacando cómo ha sido tradicionalmente contado por hombres bajo una óptica patriarcal. Silvia Zarco rescata las voces de Ifigenia, Políxena, Hécuba y Clitemnestra para denunciar la violencia de género y la marginación de las mujeres en la literatura y la sociedad. La puesta en escena de la obra en el Teatro Clásico de Mérida refuerza su mensaje simbólico mediante elementos escenográficos, vestuario e iluminación. La obra busca generar conciencia sobre la violencia contra las mujeres y niñas, vinculando el mito con problemáticas contemporáneas
Introduction au volume 12 "Sciences de l'information géographique et mesures environnementales"
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Le droit disciplinaire pénitentiaire : un respect des droits fondamentaux vraiment effectif ?
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Déséquilibre significatif entre professionnels : des dispositions supplétives de volonté gagnent à le rester !
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Undoing the paradigm of lithofacies control on carbonate reservoir properties through advanced rock typing
No full textInternational audienceCommonly used carbonate rock-typing methods estimate statistical relationships between geological parameters and the core-to-log domain and distribute the resulting petrophysical rock types in reservoirs, with spatial guidance from depositional concepts. This approach is based on the paradigm that there are statistically meaningful relationships between lithofacies and rock properties. We challenge this paradigm by introducing a petrophysical rock-typing method that is unbiased by sedimentological concepts. The advanced rock-typing method presented in this paper combines electrofacies, pore types from core and logs, and statistically relevant depositional attributes to define highly predictable petrophysical rock types. Spatial rules are derived from the determination of petrophysical categories in well domains or via distribution in porosity cubes from seismic data.We present the implementation of this workflow in four case studies representing marine and lacustrine carbonates in green to mature field development settings from the Middle East, Brazil, and Angola. Our results unanimously show late burial diagenesis as the primary process correlating with petrophysical properties relevant to reservoir characterization in both core and log domains; early and shallow diagenesis has a minor correlation, whereas lithofacies show negligible correlation. This indicates that diagenetic modification should be used as a primary driver for populating reservoir quality parameters in space, whereas sedimentary lithofacies and their distribution are virtually irrelevant.Advanced rock-typing provides a systematic approach to defining petrophysical rock categories and the spatial trends that underpin reservoir behaviors and can be applied in exploration, development, and production of reservoirs of both marine and continental carbonate formations
Variational data assimilation for the wave equation in heterogeneous media: Numerical investigation of stability
No full textInternational audienceIn recent years, several numerical methods for solving the unique continuation problem for the wave equation in a homogeneous medium with given data on the lateral boundary of the space-time cylinder have been proposed. This problem enjoys Lipschitz stability if the geometric control condition is fulfilled, which allows devising optimally convergent numerical methods. In this article, we investigate whether these results carry over to the case in which the medium exhibits a jump discontinuity. Our numerical experiments suggest a positive answer. However, we also observe that the presence of discontinuities in the medium renders the computations far more demanding than in the homogeneous case
