Viscoélasticité et récupération améliorée du pétrole

Abstract : Conditions of oil displacement in simple geometries are studied according to clearly identifiable characteristics of viscoelastic fluids. In these immiscible displacement experiments, a lower viscosity oil will be displaced using a reference Newtonian fluid and viscoelastic fluids that we will select, develop and characterize. The displacement experiments in a Hele-Shaw cell show that the elastic nature of formulations alters displacement conditions, especially at high velocities. Similarly we can observe a series of experiments in which the interfacial tension of the system fluid-oil was decreased to show that the effect of the elasticity appears under these conditions. We can also observe how the trends remain at the microscopic level, where the penetration of viscoelastic fluids in a model pore is more pronounced compared to a Newtonian fluid. Finally we propose a simple model which takes into account the elastic properties of fluids in deformation of the fluid-oil interface that results in a difference for immiscible displacement when compared to Newtonian fluids
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Jorge Avendano. Viscoélasticité et récupération améliorée du pétrole. Autre. Université Paris-Est, 2012. Français. ⟨NNT : 2012PEST1020⟩. ⟨pastel-00695896⟩

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