Title

DESEMPENHO DE FLUIDOS DE PERFURAÇÃO HIDROARGILOSOS ADITIVADOS COM POLÍMEROS E LUBRIFICANTES

PERFORMANCE OF WATER AND CLAY BASED DRILLING FLUIDS WITH POLYMERS AND LUBRIFICANTS ADDITIVES

Authorship

Medeiros, Renalle Cristina Alves de; Amorim, Luciana Viana

Medeiros, Renalle Cristina Alves de

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Amorim, Luciana Viana

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DOI

10.5151/2594-5327-14728

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Abstract

Com o objetivo estudar o desempenho de fluidos hidroargilosos aditivados com polímeros e lubrificantes visando sua aplicação em operações de sondagem e perfuração de poços artesianos e de petróleo foram estudadas uma amostra de bentonita sódica industrializada, dois aditivos poliméricos e dois lubrificantes comerciais, em diferentes concentrações e determinadas as propriedades reológicas, de filtração e o coeficiente de lubricidade dos fluidos. Os resultados evidenciaram que: i) os fluidos preparados apenas com argila apresentaram comportamento de fluidos Binghamianos e após a adição dos polímeros, passaram a apresentar comportamento pseudoplástico;; ii) a aditivação polimérica adéqua as propriedades reológicas e de filtração de fluidos contendo argila bentonítica em baixa concentração (2,5%); iii) a aditivação dos fluidos com lubrificantes não produz nenhum efeito adverso nos parâmetros reológicos (VA, VP e LE) e de filtração (VF e ER) e iv) a variação do teor de lubrificante não altera de forma significativa as propriedades reológicas, de filtração e lubricidade dos fluidos, sendo portanto o teor mínimo de 1,0% suficiente para adequar a capacidade lubrificante dos fluidos.

This work has the aim to study the performance of water and clay based drilling fluids with polymeric additives and lubricant aiming at its application in sounding and artesian wells and oil perforation operations. A sample of industrialized sodium bentonite, two polymeric additives and two commercial lubricant had been studied, in different concentrations and determined the rheological and filtration properties and the lubricity coefficient of the drillling fluids. The results had evidenced that: i) the fluids prepared only with clay had presented Binghamianos behavior and after the addition of polymers, they had started to present pseudoplastic behavior; ii) the polymeric additives adjusts the rheological and filtration properties of drilling fluids with bentonite clay in low concentration (2.5%); iii) the lubricants additives of fluids don’t produce adverse effect in the rheological (AV, PV and YP) and of filtration parameters (WL and TFC) and iv) the lubricant variation does not modify the rheologic, filtration and lubricity properties of drilling fluids, being the minimum text of 1,0% sufficient to adjust the lubricity of fluids.

Keywords

Fluidos aquosos; Bentonita; Aditivos poliméricos; Lubricidade.

Aqueous fluids; Bentonite; Polymer additives; Lubricity.