Integration of diagenesis in basin-scale, stratigraphic forward models using reactive transport modeling: Input and scaling issues

This article presents an integrated approach based on stratigraphic forward modeling and reactive transport to adequately represent the development of a mixed siliciclastic-carbonate sedimentary system its diagenesis. work was realized realistic case study, Oligo-Miocene series Carry-le-Rouet, South-East France, characterized by complex pattern bioclastic, bioconstructed siliciclastic deposits, affected several exposure surfaces associated meteoric A first phase consisted in building model (SFM), using software DionisosFlow. The construction sensitivity tests two main parameters controlling basin sedimentation: 1) competition between carbonate production supply; 2) subsidence. results simulations, especially facies distribution, thickness deposits architectures were compared with observed data validate model. second focusing specific event performing (RTM) 2D section extracted from DionisosFlow evaluate mineralogical transformations resulting petrophysical evolutions created early calculation show occurrence domains salinity, that distinct diagenetic environments: marine phreatic. Globally, simulated trends are qualitatively consistent petrographic observations, except for replacement aragonite calcite cement, systematically occurred is not always thin sections. preliminary study emphasizes issues application RTM phenomena, linked uncertainties inherent parameters, such as minerals kinetic properties, mismatch space time scales modeled processes upscaled description each SFM cell. These argue favor alternative solution, could conciliate different processes. combination various output properties simplified chemical reactions whose rates have been tuned interest provide risk maps would constitute useful guides exploration at scale.