Efeitos De Aditivos Poliméricos Nas Propriedades Reológicas E De Filtração De Fluidos De Perfuração

Abstract

ResumoA influência da carboximetilcelulose, CMC, (redutor de filtrado) e da goma xantana (viscosificante), nas viscosidades aparente e plástica, no limite de escoamento e no volume de filtrado na composição de fluidos de perfuração à base de água foi investigada com base no delineamento estatístico. Cinco formulações compostas por uma faixa de concentração utilizada comercialmente foram utilizadas na concepção da experiência. As formulações foram preparadas de acordo com os padrões da empresa Petrobras. Foram calculados modelos de regressão, correlacionando as propriedades com as composições. A importância e a validação dos modelos foram confirmadas pela análise estatística. O desenho estatístico pode ser aplicado para otimizar as propriedades da lama considerando adição de CMC e da goma xantana, e para obter um melhor entendimento sobre a influência de aditivos sobre as propriedades de polímeros de sistemas de fluidos de base água. A partir do estudo observou-se que os valores das propriedades reológicas variaram com a concentração dos aditivos, aumentando com o aumento da concentração dos mesmos, e que o aumento da concentração dos aditivos promoveu uma diminuição dos valores dos parâmetros de filtração. Palavras-chaves: Fluidos poliméricos; Viscosificante; Redutor de filtrado; Delineamento estatístico. EFFECTS OF PROPERTIES POLYMERIC ADDITIVES IN RHEOLOGIC AND DRILLING FLUIDS AbstractThe influence of carboxymethylcellulose, CMC (filtrate reducer) and xanthan gum (viscosifier) in plastic and apparent viscosity at yield strength and the volume of filtrate in the composition of drilling fluids based on water was investigated based on statistical design. Five formulations consist of a range of concentrations used commercially were utilized in the design of the experiment. The formulations were prepared in accordance with company standards Petrobras. Regression models were calculated and correlated with the properties of the compositions. The relevance and validation of the models were confirmed by statistical analysis. The design can be applied to statistically optimize the mud properties considering the addition of CMC and xanthan gum, and to provide a better understanding of the influence of additives on the properties of polymer-based fluid system water. From the study it was observed that the values of the rheological properties vary with the concentration of additives, increasing with increasing concentration of the same, and that the concentration of the additives caused a decline of parameter values filtration. Keywords: Polymeric fluids; Viscosifier; Filtrate reducer; Statistical design. INTRODUÇÃOA incorporação de polímeros como componentes de fluidos de perfuração figura atualmente como uma das principais alternativas para adequação das propriedades que o fluido deve apresentar na atividade de perfuração de poços de petróleo [1].Os fluidos de perfuração apresentam várias propriedades físico-químicas que devem ser levadas em consideração durante sua aplicação [2]. As soluções poliméricas colocam-se como ...

Rheological assessment of the interaction between hydrophobic nanoclay and xanthan gum in saline environment, for application in drilling nanofluid

“…Abdo & Haneef 2013 In parallel, the use of biopolymers in drilling fluids has been occurring since the second half of the 20th century [Caenn et al, 2014], mainly associated with improved filtrate control, well stability, emulsification, lubrication and improved rheological properties [Caenn et al, 2014;Rossi et al, 2003;Lucena et al, 2014], however, due to limitations for application at high pressure and temperature [Caenn et al, 2014;Sadeghalvaad and Sabbagui, 2015], in the last decade biopolymers have been modified by nanoparticles for the nanofluids development. Jain and Mahto (2015) associated polyacrylamide and nanoclay to control shale stability.…”

“…Considering the physical and chemical properties of XG and its contribution, the properties of drilling fluids [Bland et al, 2006;Caenn et al, 2014;Lucena et al, 2014], and the versatility and availability of nanoclays and the improvement brought to the polymeric nanocomposites of this material [Uddin, 2008;Mélo et al, 2014;Santos et al, 2016;Amari and Sadeguialiabadi, 2014], the improving possibility the XG's characteristics with the nanoclay addition is interesting. In parallel, considering the interaction with shale and the nanometric dimensions of its pores [Khodja et al, 2010;Steiger & Leung, 1992;Chenevert, 1970;Al-Bazali et al, 2005;Cai et al, 2011], its inhibition demands anionic interactions, evaluated with the adoption of nanoparticles associated with polymers [Parizad et al, 2018;Abdo e Haneef, 2013].…”

Evaluation of hydrophylic montmorillonite nanofluids and xantane gum in saline environment

“…Usually associated with clay sludge, polymers accumulate multiple functions in drilling fluids, such as viscosifiers, filtrate tuners, well wall stabilizers, shale swelling inhibitors, etc., but their properties are sensitive to high temperatures (Caenn et al, 2014;Lucena et al, 2014). As an example of polymer-based nanofluids, Ismail et al 2016 xanthan, polyacrylamide and carboxymethylcellulose; Sadeghalvaad and Sabbaghi (2015) applied titanium nano-oxide to polyacrylamide sludge; Fakoya and Shah (2013) used silica nano-oxide and a mixture of surfactant and guar gum.…”

PVT properties study of mixture of methane and glycerin based drilling fluids

“…The ability to prevent the hydration of water-sensitive materials has a huge impact on the well stability. According to Caenn, et al (2014), the reason behind well instability related to the interaction between drilling fluid and formation is hydration. Concern about well stability related to hydration of water-sensitive materials has been studied for years.…”