Estudo de sistemas de colchões lavadores para aplicação em poços perfurados com fluidos de perfuração não aquosos
Drilling fluids used to assist the operation of drilling perform several functions among them, forming a film of low permeability (filter-cake) in the walls of the borehole preventing damage to the formation. After the descent of the column casing, the annular space to be filled with cement durin...
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| Formato: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/27033 |
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| Resumo: | Drilling fluids used to assist the operation of drilling perform several functions among them,
forming a film of low permeability (filter-cake) in the walls of the borehole preventing
damage to the formation. After the descent of the column casing, the annular space to be filled
with cement during this process are used, often two types of mattresses, "cushion washer" and
"cushion spacer", where the first aims at removing the filter-cake formed by the drilling fluid
and the second avoid contamination of the cement by other fluids. The efficiency of the
mattress scrubber is enhanced by the presence of mixtures of dispersants and surfactants in
the composition. The use of technology is an alternative surfactant in removing the nonaqueous
drilling fluid and has been demonstrated in field operations that these techniques are
successful. Within this context, this work was carried out with two main objectives: to study
the parameters that influence the microemulsion system (nature of the surfactant (T), the
nature of the cosurfactant (C) and the C/T) and evaluating the removal efficiency of a movie
drilling fluid synthetic paraffin base and brine (70:30). From the construction of the diagrams
were chosen those with larger regions of microemulsions. The mattresses washers
microemulsion formed with KMS surfactant, n-butanol and the ratio C/T 0,5 were those with
the best efficiency results, on average 33 seconds according to the "PROCELAB". The results
indicated that the mattresses microemulsion systems are promising vehicles contributing to
the cementing operation of oil wells because they are of great interest and economical
production that mattresses are performing well in their jobs. |
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