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|Title:||Modeling and simulation of laboratory-scale polymer flooding|
|Author:||Ferreira, V. H. S|
Moreno, R. B. Z. L.
|Abstract:||Polymer flooding enhanced oil recovery is distinct from the other recovery methods for its ability of oil production anticipation and water circulation reduction. These enhancements are due to changes in the viscosity of the injected fluid and the permeability of the porous media. Polymer flow through porous media, however, is subject to complex phenomena such as non-Newtonian viscosity, retention mechanisms, and inaccessible pore volume. These phenomena must be addressed in laboratory experiments which often use salt tracers, although specific instrumentation and planning are required to properly quantify them. The objective of this work is the development of a cheap and easy to use computational tool to assist experimentalists. This work develops a mathematical modeling to one-phase flow of polymeric solutions in onedimensional porous media. The transport of fluid and components (polymer and tracer) are modeled through three coupled partial differential equations. Constitutive equations are also present to model the coupled phenomena. A dimensionless numerical solution is achieved through the finite differences method and a fully implicit solution for pressure and concentration behavior is proposed. The complete model is presented and discussed to allow reproduction of the results. One experiment aimed to estimate inaccessible pore volume, retention, resistance factor and residual resistance factor is selected from the literature for a history matching. The input parameters directly taken from the experiment’s data were: fluid rheology; fluid-rock interactions; rock sample geometry and properties; and initial and boundary conditions. The only parameter up for adjustment is the moment for injection startstop. The simulation results fitted the experimental measurements nicely. The differences are discussed in terms of validity and an enhanced analysis of the results is made possible by the model. As of this work’s novelty, the presented model proves itself as a simple and low-cost aiding tool for experimental planning and analysis in single-phase one-dimensional polymer flooding experiments in the presence of salt tracers|
|Appears in Collections:||FEF - Artigos e Outros Documentos|
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