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PRODUCTION D'HUILES LOURDES PAR DÉPRESSURISATION : ÉTUDE DES INTERFACES HUILE-AIR ET MODÉLISATION DU PROCÉDÉ

Abstract : This thesis is an experimental and theoretical contribution to the modeling of the crude oil production in petroleum reservoirs under depressurization. Oil is produced under the bubble point in order to take advantage of gas expansion to displace the oil phase, a process called « solution gas drive ». So far, existing reservoir simulators are able to simulate such a mechanism only for light oils. For heavy oils, there is a problem due to the high viscosity and the physicochemical properties of the oils. Standard numerical simulators can account neither for out of equilibrium mechanisms, nor flow of a dispersed gas phase. A large number of studies have been published, especially at pore level, but a literature study shows the need for a model described by continuous equations (Darcy's approach). The experimental study of physicochemical properties (dynamic surface tension, surface elasticity) of the crude components show that asphaltenes can act as a surfactant which enhance foam production above a concentration threshold. A continuum model has been developed, based on the physical mechanisms and involving only measurable variables. Gas nucleation and mass transfer are modeled using a volumic transfer function, nucleation being described by preexisting bubbles. Gas can be present either as a continuous phase or as bubbles dispersed in the oil phase. The simulations of several experiments with various rocks and fluids had proven that the model can predict the amount of oil and gas produced during the experiments.
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https://tel.archives-ouvertes.fr/tel-00006787
Contributor : Fabrice Bauget <>
Submitted on : Wednesday, September 1, 2004 - 3:18:49 AM
Last modification on : Wednesday, October 14, 2020 - 3:41:47 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:06:05 PM

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  • HAL Id : tel-00006787, version 1

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Fabrice Bauget. PRODUCTION D'HUILES LOURDES PAR DÉPRESSURISATION : ÉTUDE DES INTERFACES HUILE-AIR ET MODÉLISATION DU PROCÉDÉ. Dynamique des Fluides [physics.flu-dyn]. Université Paris Sud - Paris XI, 2002. Français. ⟨tel-00006787⟩

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