Synthesis, characterization and hydration analysis of a novel epoxy/superplasticizer oilwell cement slurry - Some mechanistic features by solution microcalorimetry

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:392

Article

Cestari, Antonio R.¹  Vieira, Eunice F. S.¹  Silva, Ellen C. S.¹  Alves, Fernanda J.¹  Andrade, Marcos A. S., Jr.¹ 

[1] Univ Fed Sergipe, Dept Chem, CCET, Lab Mat & Calorimetry, BR-49100000 Sao Cristovao, Sergipe, Brazil

关键词: Oilwell cement slurries;    Epoxy resins;    Polyacrylates;    Solution microcalorimetry;    Eco-friendly materials;    Superplasticizers;    Solution calorimetry;    Kinetic modeling;   

DOI  :  10.1016/j.jcis.2012.04.037

来源: Elsevier

【 摘 要 】

A new epoxy/polyacrylate-modified oilwell cement slurry was synthesized. The features of the new slurry were evaluated in relation to a standard cement slurry (w/c = 0.5). The characterization of the slurries was performed by Raman, XRD, TG/DTG and solid-state diffuse reflectance spectroscopy. The main morphological features of the new slurry were preserved, even after long-term contact with HCl in aqueous solution. The hydration of the slurries was studied by heat-conduction microcalorimetry. The exothermic microcalorimetric outputs were well fitted to a three-parameter kinetic model. The analysis of both thermodynamic and kinetic results from microcalorimetry have pointed out that diffusional growth from non-stoichiometric mixtures is the main mechanistic feature of the hydration of the cement slurries. The results of this study underline the excellent features of the new epoxy/superplasticizer-modified cement slurry for using in severe acidic environments of oilwells. (c) 2012 Elsevier Inc. All rights reserved.

【 授权许可】

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