Banca de QUALIFICAÇÃO: JORGE DANIEL ARAUJO PINTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : JORGE DANIEL ARAUJO PINTO
DATA : 21/10/2019
HORA: 14:00
LOCAL: Laboratório de Cimentos
TÍTULO:

Evaluation of mechanical behavior in steam injection environments of micronized polyurethane cement blends

PALAVRAS-CHAVES:

Steam Injection, Micronized polyurethane, Mechanical properties.

PÁGINAS: 81
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
RESUMO:

Steam injection is an economically viable alternative and it’s widely used for heavy oil recovery in oil wells. In this technique the temperature of the fluids present there is increased and consequently that of the well. This temperature increase causes the expansion of the casing, which returns to its initial dimensions with the end of the injection cycle, generating stresses and cracks in the cement sheath. For this reason, an appropriate cementation design should be done to avoid future failure of the cement sheath due to thermal stresses. For this goal, this work focused on the addition of a micronized polyurethane powder to the cement mass to increase its mechanical properties such as compressive strength and fracture energy during breakage. For this purpose, were accomplished compressive strength tests and technological tests in fresh state. Slurries with 0, 1 and 4% polyurethane powder were formulated in addition to the cement and cured at temperatures of 38 ° C and 300 ° C for 1 and 7 days respectively and pressure of 2kpsi for slurries cured at 300 ° C. A characterization was also made in SEM, XRD, TG / DTG and DSC. The results showed that the polymer had a good adhesion to the matrix, which provided a good strength gain and absorbed energy before the fracture in the order of 75.48% and 61.99% respectively considering the formulation with 1% of the additive under study, which was the one that got the best results.

MEMBROS DA BANCA:
Presidente - 1298936 - ANTONIO EDUARDO MARTINELLI
Externo ao Programa - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS
Interna - 1755267 - MARIA CAROLINA BURGOS COSTA DO NASCIMENTO