Name: FABRICIO DIAS DE OLIVEIRA
Publication date: 30/07/2021
Advisor:
Name |
Role |
|---|---|
| RENATO DO NASCIMENTO SIQUEIRA | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANA PAULA MENEGUELO | External Examiner * |
| EDSON JOSE SOARES | Internal Examiner * |
| PATRÍCIO JOSÉ MOREIRA PIRES | Co advisor * |
| RENATO DO NASCIMENTO SIQUEIRA | Advisor * |
Summary: The study of fluid flow in porous media is one of the greatest challenges of engineering, especially in the oil exploration area, WHERE the recovery factor does not exceed 40% through primary and secondary recovery methods. In this work, it is verified, using an experimental methodology, the application of polymer-based solutions to recover newtonian solutions present in a porous medium, aiming to understand the essential parameters related to the recovery factor.
For the newtonian scenario, solutions with different concentrations of PEG, water and alcohol were used to recover oil-based solutions, and it was observed that the reduction in the viscosity ratio resulted in a smaller amount of lost mass, mainly due to the higher shear force that the pores receive and consequently greater pore sweep. For the viscoelastic scenario, several water based solutions, PEO and PEG were prepared, but only two of the viscoelastic solutions were used to recover different oil based solutions, due to the fact that they present the best combinations of viscosity to obtain the analyzed viscosity ratios. It was observed that the increase in PEO concentration increased the elastic effects and consequently the lost mass fraction reduced, when compared to the analogous Newtonian scenario. Properties such as storage modulus, loss modulus, normal force and Deborah number were fundamental in the study of the non-Newtonian scenario.
Keywords: viscosity ratio, porous medium, recovery factor, viscoelastic, Deborah number.
