Phase behavior and rheology of drilling fluid o/a with nonionic surfactant and glycerol
Abstract
The main objective of this work was to formulate drilling fluid obtained from a microemulsified system, using distilled water and water:glycerol solution (40%) in the aqueous phase. The water-in-oil microemulsion regions were precisely determined and the influence of glycerol on the microemulsified area was also examined. All the systems studied showed an isotropic region rich in water (water-in-oil microemulsion area), which was considered highly dependent on the surfactant weight ratio. By means of the integral calculation, the area of the microemulsified region was determined for the studied systems and it was verified that the Water:Glycerol (40%)/TWN 80/Pine oil system presented a larger area of the microemulsion region. In addition to the microemulsified system, the drilling fluids had in their composition the bentonite CMC, HPA and NaCl. The flow curves of both fluids showed a characteristic profile of the Bingham model, corresponding to a fluid with pseudoplastic behavior. This characteristic is very important for drilling fluids, as pseudoplastic fluids show a reduction in viscosity with increasing flow rate (shear rate), thus facilitating flow during drilling.
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Copyright (c) 2023 Ingrid de Carvalho Follone, Anderson Marciel Pereira de Sales, Camila Renata Fernandes Oliveira, Ruza Gabriela Medeiros de Araújo Macedo, Diego Angelo de Araújo Gomes, Geraldine Angélica Silva da NóbregaAuthor(s)
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Ingrid de Carvalho Follone
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Anderson Marciel Pereira de Sales
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Camila Renata Fernandes Oliveira
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Ruza Gabriela Medeiros de Araújo Macedo
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Diego Angelo de Araújo Gomes
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Geraldine Angélica Silva da Nóbrega