Avaliação da permeabilidade na interface revestimento metálico - bainha de cimento em poços submetidos à injeção de vapor
In order to improve efficiency and increase the production factor of heavy oils or oils from mature fields, oil recovery methods are used, with the thermal method being the most successful. Exposure of the steel coating and the cement sheath to thermal cycling conditions can cause cracks to appear...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/32615 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | In order to improve efficiency and increase the production factor of heavy oils or oils from
mature fields, oil recovery methods are used, with the thermal method being the most successful. Exposure of the steel coating and the cement sheath to thermal cycling conditions can cause
cracks to appear, making it possible for 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. Látex of the
SBR type has been widely used in order to improve the mechanical properties of cementing
materials destined for oil wells. However, few studies have presented new methodologies for
evaluating the performance of these materials, through the physical simulation of certain conditions of a well (cement / coating). Within this context, this work aimed to evaluate the permeability between a steel liner and a cement sheath additive with SBR Látex, simulating thermal cycling conditions in which oil wells are subjected during the recovery of heavy oils by
thermal methods . From an experimental planning for 2 independent variables, defined as concentration of Látex SBR, varying between 0 L / m³ and 267.36 L / m³ (0 gpc and 2 gpc), and
density of cement paste. between 1.75 g / cm³ (14.6 lb / Gal) and 1.89 g / cm³ (15.8 lb / Gal),
the permeability behavior was studied. The results showed that the increase 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 Látex SBR
contributed to a better adherence of the cement matrix to the coating, favoring positively the
results of the samples that were exposed to the steam injection temperature (300 ° C). The
experimental planning helped in the reduction of the number of experiments or repetitions and
in the improvement of the interpretation of the results obtained, consequently, in the determination of the best conditions for the formulation of slurry applicable in cementing operations of
oil wells subject to injection. of steam. |
|---|