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Previous issue date: 2016-12-27 / O comportamento reol?gico dos fluidos de perfura??o ? fundamental para se determinar a melhor composi??o e tratamentos a serem aplicados nos fluidos. Este trabalho apresenta um estudo sobre o comportamento reol?gico de sistemas pol?mero - tensoativo para utiliza??o como aditivos viscosificantes em fluidos base ?gua. Os aditivos utilizados foram os pol?meros goma xantana (GX) e poliacrilamida (PAC) e os tensoativos sab?o base (ani?nico) e cetremida (cati?nico). Os sistemas foram submetidos ? caracteriza??o reol?gica em diversas concentra??es de tensoativo a uma concentra??o fixa de pol?mero. A caracteriza??o reol?gica foi realizada atrav?s de ensaios de reologia, utilizando sistema de cilindros coaxiais, onde se obteve as curvas de fluxo e curvas de viscosidade para cada sistema. A partir das curvas geradas foi aplicado o modelo matem?tico que melhor representou cada sistema bem como os par?metros desse modelo. Em todos os sistemas o modelo de Herschel-Bulkley foi o que melhor representou o comportamento, podendo classific?-los como pl?sticos (pseudopl?sticos com limite de escoamento). A partir da caracteriza??o reol?gica, foi poss?vel determinar e utilizar as concentra??es que apresentaram os maiores valores de viscosidades, que foram: poliacrilamida com 400 ppm de sab?o base e poliacrilamida com 400 ppm de cetremida. A partir das concentra??es escolhidas foram formulados 4 (quatro) fluidos modificando apenas do aditivo viscosificante, o Fluido A (GX), Fluido B (PAC), Fluido C (PAC+400 ppm Sab?o Base) e Fluido D (PAC+400 ppm cetremida). Em seguida, foram realizados ensaios reol?gicos com aux?lio de um viscos?metro de campo com os fluidos formulados. Apesar das solu??es pol?mero - tensoativo apresentarem melhores resultados reol?gicos, quando adicionados ao fluido de perfura??o com os outros aditivos da formula??o base, tiveram uma queda substancial do potencial viscosificante, fato que pode ser explicado pela interfer?ncia dos sais NaCl e KCl na na hidrata??o do pol?mero Poliacrilamida. Assim o Fluido A (GX) apresentou os melhores resultados reol?gicos. / The rheological behavior of drilling fluids is essential to determine the best composition and treatments to be applied to fluids. This project presents a study of the rheological behavior of Polymer - Surfactant systems for use such as viscosifying additives in the base fluid water. The additives used were polymers Xanthan Gum (GX) and polyacrylamide (PAC) and the surfactants Soap Base (anionic) and Cetremid (cationic). The systems were subjected to rheological characterization of various surfactant concentrations at fixed polymer concentration. The rheological characterization was performed using rheology testing system using coaxial cylinders, where it obtained the flow curves, viscosity curves for each system. From the generated curves were applied mathematical model best represented the systems as well as the parameters of this model. In all systems the model of Herschel-Bulkley was best represented the behavior and can classify them as Plastics (Pseudoplastic with yield strength). From the rheological characterization, it was possible to determine and use concentrations with the highest viscosity values, which were Polyacrylamide with 400 ppm soap base and polyacrylamide with 400 ppm Cetremide. From the chosen concentrations were made three (3) fluids modifying only the viscosifying additive, the Fluid A (XG), Fluid B (PAC), Fluid C (PAC + 400ppm Soap Base), and Fluid D (PAC + Cetremide 400 ppm). Then rheological test was carried out with the aid of a field viscometer with the formulated fluids. Despite the Polymer - Surfactant solutions deliver better rheological results when added to the drilling fluid with other additives of the base formulation, had a substantial fall of viscosifying potential, which can be explained by the interference of NaCl and KCl salts in the polyacrylamide hidratation. So Fluid A (XG) showed the best results rheology.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23696 |
| Date | 27 December 2016 |
| Creators | C?ndido, Herick de Bulh?es |
| Contributors | 59545844434, http://lattes.cnpq.br/2811639726261017, Ara?jo, Alessandro Alisson de Lemos, 01322289476, http://lattes.cnpq.br/6204950349091367, Oliveira, Humberto Neves Maia de, 22179763468, http://lattes.cnpq.br/7302633941782540, Barros Neto, Eduardo Lins de |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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