Formulação de microemulsões para aplicação como colchões lavadores em limpeza de poços de petróleo

• Ano de defesa: 2023
• Autor(a) principal: Caminha, Thaine Taumaturgo
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Rio Grande do Norte; Brasil; UFRN; PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA QUÍMICA
• Palavras-chave em Português: Microemulsão; Colchão lavador; Fluido de perfuração; Reboco; Cimentação; CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA
• Link de acesso: https://repositorio.ufrn.br/handle/123456789/57508

Flushing fluid are fluids used during the well drilling process, which perform the function of cleaning the walls of the well, removing the plaster formed and ensuring that the next stage of cemeting is successful. Flushing fluids can be made up of water or oil, surfactants and dispersants, being able to thin and remove the drilling fluid. In this context, the use of vegetable oils in the composition of flushing fluid and the use of biodegradable surfactantes are important for formulations developed ecologically correct. Thus, this study aims to develop microemulsions which act as potential flushing fluid, to be used for cleaning and inversion wettability of wells, before an operation of cementing oil wells. Two diferente microemulsion systems were prepared using nonionic surfactante, the first one using bio oil as vegetable oil and the second using castor oil. Removal tests, termal stability, rheology, inversion of wettability and compatibility tests were realized to verify the efficiency of the flushing fluids formulated for future application in the oil industry. According to the removal test, using bio oil as vegetable oil, the microemulsions were able to removed completely the drilling fluid in up to 3 minutes (time less than 10 minutes of the test). However, meantime through reversing wettability tests, the sample wasn’t efficient. Castor oil based microemulsions were able to removed the drilling fluid, the removal was greater than 75% in all samples, ans they are all stable in the temperature gradient of the well and they are newtonian fluid. In addition, the system formulated using NP100, water/glycerin and castor oil diluted in a 1:1 showed satisfactory compatibility with drilling fluid.