Banca de QUALIFICAÇÃO: FABRICIO PEREIRA FEITOZA DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : FABRICIO PEREIRA FEITOZA DA SILVA
DATE: 25/08/2020
TIME: 15:00
LOCAL: Sala virtual
TITLE:

DEVELOPMENT OF METHODOLOGY FOR ASSESSMENT OF CEMENT SLURRY INTENDED FOR WELLS SUBMITTED TO STEAM INJECTION

KEY WORDS:

Cement, metallic casing, Latex SBR, experimental design, permeability.

PAGES: 103
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
SPECIALTY: Cerâmicos
SUMMARY:

To improve efficiency in the production of hydrocarbons in fields containing heavy oil, currently, the methods with the highest rate of recovery success are thermal ones, mainly steam injection. Exposure of the metallic coating and the cement sheath to thermal cycling conditions can cause cracks to appear, allowing fluids to pass through the cement sheath due to the difference in the expansion coefficient between the two materials. This causes serious socioeconomic and environmental risks, compromising the productive life of the well. Latex of the SBR type has been widely used in order to improve the mechanical properties of cementing materials for oil wells. However, few studies have presented new methodologies for assessing the performance of these materials by physically simulating the condition of a well (cement / casing). Within this context, this work aimed to develop a test methodology to assess the permeability between a steel casing and a cement sheath, added with Latex SBR, simulating thermal cycling conditions in which oil wells are subjected during the recovery of heavy oils by thermal methods. From an experimental design for 2 independent variables, defined as SBR Latex concentration, varying between 0 L / m³ and 267.36 L / m³ (0 gpc and 2 gpc) and, cement paste density between 1.75 g / cm³ (14.6 lb / Gal) and 1.89 g / cm³ (15.8 lb / Gal), the permeability behavior was studied. Images were captured, using an optical microscope, to assess the adhesion of the cement matrix to the metallic casing. The results showed that the variation in density, had greater significance in the samples that were submitted to the static temperature conditions of the well (68 ° C). It was also observed that the increase in the concentration of Latex SBR favored a better result in the samples that were exposed to steam injection temperature (300° C). The experimental planning helped to reduce the number of experiments or repetitions and improves the quality of the information obtained through the results, consequently, to determine the best conditions for the formulation of slurry applicable in cementing operations of oil wells subject to steam injection. The methodology developed in this work showed satisfactory results and demonstrated that the increase in the latex concentration favors the adherence of the cement matrix to the coating, according to permeability results and images obtained from an optical microscope.

BANKING MEMBERS:
Externo ao Programa - 1804366 - JÚLIO CÉZAR DE OLIVEIRA FREITAS
Presidente - 6347420 - MARCUS ANTONIO DE FREITAS MELO
Externo à Instituição - RODRIGO CÉSAR SANTIAGO - UFERSA