Influ?ncia da adi??o de gres porcelanato no comportamento mec?nico e microestrutural em pastas de cimento portland para cimenta??o de po?os de petr?leo

• Main Author: Santos, Tiago Renovato dos
• Other Authors: CPF:06117988320
• Format: Others
• Language: Portuguese
• Published: Universidade Federal do Rio Grande do Norte 2014
• Subjects: Cimento; Difra??o de raios X; Pozolana; Po?os de petr?leo; Resist?ncia; Cement; Oil Wells; Pozolane; Resistance; X-ray Diffraction; CNPQ::ENGENHARIAS::ENGENHARIA QUIMICA::TECNOLOGIA QUIMICA::PETROLEO E PETROQUIMICA
• Online Access: http://repositorio.ufrn.br:8080/jspui/handle/123456789/12898

Made available in DSpace on 2014-12-17T14:08:34Z (GMT). No. of bitstreams: 1 TiagoRS.pdf: 224853 bytes, checksum: a7ecf3c3cba57ff6b3ea1ac7c4fb7f05 (MD5) Previous issue date: 2009-06-02 === Petr?leo Brasileiro SA - PETROBRAS === Cementation operation consists in an extremely important work for the phases of perforation and completion of oil wells, causing a great impact on the well productivity. Several problems can occur with the cement during the primary cementation, as well as throughout the productive period. The corrective operations are frequent, but they are expensive and demands production time. Besides the direct cost, prejudices from the interruption of oil and gas production till the implementation of a corrective operation must be also taken into account. The purpose of this work is the development of an alternative cement paste constituted of Portland cement and porcelainized stoneware residue produced by ceramic industry in order to achieve characteristics as low permeability, high tenacity, and high mechanical resistance, capable of supporting various operations as production or oil wells recuperation. Four different concentration measures of hydrated paste were evaluated: a reference paste, and three additional ones with ceramic residue in concentrations of the order of 10%, 20% and 30% in relation to cement dough. High resistance and low permeability were found in high concentration of residues, as well as it was proved the pozolanic reactivity of the residue in relation to Portland cement, which was characterized through x-ray and thermogravimetry assays. It was evident the decrease of calcium hydroxide content, once it was substituted by formation of new hydrated products as it was added ceramic residue === A opera??o de cimenta??o consiste em um trabalho de extrema import?ncia para as fases de perfura??o e completa??o de po?os de petr?leo e tem grande impacto sobre a produtividade do po?o. Muitos problemas podem ocorrer com o cimento, tanto durante a cimenta??o prim?ria do po?o como tamb?m durante seu per?odo produtivo. As opera??es para corre??o destes problemas s?o freq?entes, por?m onerosas e demandam tempo de produ??o. Al?m do custo direto da opera??o corretiva, deve m ser ontabilizados, ainda, preju?zos devidos ? interrup??o da produ??o de ?leo e g?s at? que uma opera??o de corre??o seja realizada. Este trabalho tem como objetivo o desenvolvimento de pastas cimentantes alternativas, constitu?das por cimento Portland e um res?duo de porcelanato produzido pela ind?stria cer?mica, a fim de obter caracter?sticas como baixa permeabilidade, alta tenacidade e alta resist?ncia mec?nica, capazes de suportar as diversas opera??es, tanto de produ??o como de recupera??o de po?os de petr?leo. Foram avaliadas quatro concentra??es diferentes de pastas hidratadas: uma pasta de refer?ncia e tr?s pastas contendo res?duo cer?mico nas concentra??es de 10%, 20% e 30%, em rela??o ? massa do cimento. Foram encontradas, para as maiores concentra??es de res?duo, maior resist?ncia mec?nica e menor permeabilidade, al?m de ser comprovada a reatividade pozol?nica do res?duo com o cimento Portland. Esta foi caracterizada atrav?s dos ensaios de Difra??o de Raios X e Termogravimetria, ficando clara a diminui??o do teor de hidr?xido de c?lcio, substitu?do pela forma??o de novos produtos hidratados ? medida que se adicionava o res?duo cer?mico