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Previous issue date: 2014-08-18 / Este trabalho objetiva avaliar a influencia da goma xantana e carboximetilcelulose (CMC) no processo de filtra??o dos fluidos de perfura??o base ?gua, considerando as mudan?as conformacionais sofridas pelos polieletr?litos com a adi??o do sal (NaCl) em diferente concentra??es (0,17; 0,34 e 0,51). Foi tamb?m avaliado o comportamento do fluido com a adi??o do carbonato de c?lcio (CaCO3). Procurando um melhor entendimento entre os pol?meros utilizado e o CaCO3, as analises de adsor??o polim?rica foram realizadas por meio de um m?todo de deple??o. A maior porcentagem de adsor??o da Goma Xantana neste material pode justificar a forma??o de um reboco fino e imperme?vel para fluidos de perfura??o que contenham esse pol?mero. / This study aimed mainly to evaluate the influence of xanthan gum (XG) and
carboxymethylcellulose (CMC) in the filtration process of water-based drilling fluids,
considering the conformational changes suffered by the polyelectrolyte with the addition of
sodium chloride (NaCl) in different concentrations (0.17, 0.34 and 0.51 mol.L-1). It was also
evaluated the behavior of the fluid by the addition of calcium carbonate (CaCO3) in pure
water and in brine. Seeking a better understanding of the interaction between the polymers
used and CaCO3, polymer adsorption analyzes were performed using a depletion method,
which yielded a higher percentage of adsorption of Xanthan Gum in this material (29%),
which can justify the formation of a thin and waterproof filter cake for drilling fluids
containing this polymer. However, the best values of apparent viscosity (20 and 24 mPa.s)
and volume of filtrate (8.0 and 8.1 mL) were obtained for the systems consisting of xanthan
gum, CMC and CaCO3, in NaCl aqueous solutions concentrations of 0.34 and 0.51 mol.L-1,
respectively. The values can be related to the presence of CMC that increases the apparent
viscosity and reduces the volume of filtrate. In addition, the CaCO3 added acts as a bridging
agent, promoting the formation of a less permeable filter cake
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19424 |
| Date | 18 August 2014 |
| Creators | Luz, Railson Carlos Souza da |
| Contributors | 65946499734, http://lattes.cnpq.br/7711521318854102, Borges, Mauricio Rodrigues, 56928807768, http://lattes.cnpq.br/7409076038495589, Vidal, Rosangela Regia Lima, 59622849415, http://lattes.cnpq.br/3249504806789438, Bicudo, Tatiana de Campos, 25935096862, http://lattes.cnpq.br/2712586287719863, Balaban, Rosangela de Carvalho |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM 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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