Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
RHEOLOGICAL CHARACTERIZATION OF POLYMERIC BLEND FOR ENHANCED OIL RECOVERY (EOR)
Submission Author:
Ana de Barros , SP
Co-Authors:
Ana de Barros, Rosangela Moreno
Presenter: Ana de Barros
doi://10.26678/ABCM.COBEM2019.COB2019-1634
Abstract
Polymer injection is used by the petroleum industry to improve the oil sweep efficiency in the reservoir, and among the polymer options, partially hydrolyzed polyacrylamide (HPAM) is one of the most commonly used polymers. Recent studies show that the injection of a polymer solution is also capable of mobilizing the residual oil due to the elastic properties of the polymers, turnning possible to provide an additional increment of the oil recovery factor. Some authors demonstrated that the molecular weight distribution, often represented by the polydispersity index, directly affects the elastic properties of the polymer. Therefore, the objective of the present work was to optimize the elastic modulus of an HPAM solution through the composition of a polymer blend of the same molecular weight. Rheological tests were performed to determine the apparent viscosity and viscous and elastic modules of the polymeric solutions prepared with synthetic seawater. The obtained results showed that the polymeric blend presented a higher elastic modulus when compared to the solution with the same average molecular weight made with a single polymer. Also, the polymer blend showed an elastic modulus equivalent to that obtained for the elastic modulus of a single polymer solution of higher molecular weight.
Keywords
viscoelasticity, polymer blends, EOR, storage modulus, polydispersity index
