The transport of components and phases plays a fundamental role in the success of an EOR process. Because many reservoirs have harsh conditions of salinity, temperature and rock heterogeneity, which limit process options, a robust system with flexibility is required. Systematic experimental study of formulations capable to transport surfactant as foam at 94°C, formulated in sea water, is presented. It includes methodology to conduct core floods in sand packs using foaming surfactants and to develop “surfactant blend ratio- salinity ratio maps” using equilibrium phase behavior to determine favorable conditions for oil recovery in such floods. Mathematical model able to reproduce the foam strength behavior observed in sand packs with the formulations studied is presented. Visualization of oil recovery mechanism from matrix is realized using a model system of micro-channels surrounded by glass beads to mimic matrix and fractures respectively. The observations illustrate how components may distribute within the matrix, thereby releasing oil into the fractures. The use of chemicals to minimize adsorption is required when surfactant adsorption is important. The presence of anhydrite may limit the use of sodium carbonate to reduce adsorption of carbonates. A methodology is presented to estimate the amount, if any, of anhydrite present in the reservoir. The method is based on brine software analysis of produced water compositions and inductively coupled plasma (ICP) analysis of core samples. X-ray powder diffraction (XRD) was used to verify the mineralogy of the rock. X-ray photoelectron spectroscopy (XPS) was used to obtain surface composition for comparison with bulk composition of the rock. Adsorption of surfactants was measured using dynamic and static adsorption experiments. Determining the flow properties of the rock samples via tracer analysis permitted the simulation of the dynamic adsorption process using a mathematical model that considers the distribution of adsorbed materials in the three different regions of pore space. Using this method allows one to predict adsorption in a reservoir via simulation.

Le réchauffement de la planète, en partie dû à l'augmentation des teneurs du dioxyde de carbone (CO2) dans l'atmosphère, pousse les scientifiques à trouver des méthodes et des techniques performantes pour limiter les émissions de ce gaz. L'objectif de ce travail est d'améliorer le piégeage du CO2 sur des adsorbants à base de zéolithe et d'optimiser la désorption dans une gamme de température peu élevée (35 – 350°C). Afin d'apprécier l'influence de la méthode de synthèse, des échanges cationiques (K+, Li+, Mg2+, Ca2+ et Ba2+), des mélanges mécaniques (MgO), et des imprégnations (Mg et Ca) ont été réalisés sur la faujasite NaX.L'étude de la désorption en température (-60 à 200°C) du CO2 indique une augmentation des quantités physisorbées entre 35 – 60°C sur les adsorbants préparés. Les proportions sont de l'ordre de 5 à 20% supérieures à celles de la zéolithe de référence NaX. Quelques échantillons à faible teneur en oxyde montrent aussi une augmentation des quantités entre 60 – 120°C, en particulier la zéolithe imprégnée à 5% en acétate de magnésium avec une amélioration de 15%. Ainsi, une augmentation des interactions CO2 / structure zéolithique sur les échantillons est confirmée. En adsorption dynamique à lit fixe, le mélange mécanique à 2% d’oxyde apparaît piéger plus de CO2 que la zéolithe NaX. Des études du piégeage du CO2 ont aussi été menées en absence et en présence d'humidité puis avec des mélanges gazeux (CH4 ou C3H8). En présence d'humidité, les capacités d'adsorption du CO2 sont fortement affectées. En présence de méthane ou de propane, aucune modification des capacités d'adsorption n'est visible sur la zéolithe échangée à 100% au baryum. / Due to increase of the carbon dioxide concentration, the global warning pushes scientists to find the processes to limit these emissions. The aim of this work is to increase the CO2 storage on the materials mainly constituted of zeolite and to optimize the desorption in the temperature range between 35 – 350°C. In order to investigate the synthesis method, various samples were obtained using either the cationic exchanges (K+, Li+, Mg2+, Ca2+ et Ba2+), mechanical mixtures (MgO) or the impregnation process (Mg(CH3COO)2 and Ca(CH3COO)2).CO2 Thermal desorption study (-60 – 600°C) indicates an increase of the physisorbed compounds between 35 – 60°C on the synthesized samples. The amounts are of about 5 to 20% higher compared to the NaX reference zeolite. Few samples with low oxide amount show also an increase between 60 – 120°C, especially the zeolite impregnated (5%) which desorbs 15% more than NaX. Thus, an increase of the CO2 / zeolite interactions is confirmed.In fixed bed dynamic adsorption, the mechanical mixture with 2% of oxide traps more CO2 than the reference zeolite. These studies were also been performed in presence / absence of humidity using gaseous mixture (CH4 or C3H8). With water, the CO2 adsorption capacities are strongly affected. In presence of methane or propane, no change of adsorption capacities is observed with the baryum exchanged zeolite.