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Previous issue date: 2016-02-12 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Misturas secas para cimenta??o de po?os de petr?leo t?m gerado bastante interesse pelo simples fato de colaborar com as opera??es de cimenta??o, j? que ? adicionado somente ?gua na mistura para obten??o da pasta de cimento. Com o intuito de verificar se as propriedades da mistura seca atendem de forma efetiva as necessidades as quais s?o requeridas em campo, esse trabalho tem como objetivo formular misturas ciment?cias secas e avaliar o comportamento da mistura quando submetidas a diferentes tempos de vibra??o, sendo essa aplica??o voltada para po?os de petr?leo onshore. Para isso foi projetada uma coluna em formato cil?ndrico com canos de PVC ? qual a mistura seca foi acondicionada, sendo posteriormente vibrada em tempos de 30, 60 e 120 minutos. Em seguida a coluna foi dividida em 3 se??es, e submetida aos testes API ( American Petrolleum Institute) como reologia, perda de filtrado, tempo de espessamento, balan?a de lama e resist?ncia ? compress?o pelo m?todo ultra-s?nico (UCA) para constatar se houve diferen?a nas propriedades da pasta cimentante ap?s vibra??o. Foram formuladas pastas que atendessem as profundidades de 400, 800 e 1200 metros para po?os onshore. Os resultados demonstraram que a mistura seca teve uma reprodutibilidade satisfat?ria, visto que n?o houve migra??o significativa de aditivos entre as se??es da coluna ap?s vibra??o. Essa poss?vel migra??o foi medida atrav?s dos testes API que comprovaram semelhan?as de propriedades entre a pasta otimizada e as provenientes da coluna. Os resultados da an?lise granulom?trica tamb?m refor?am o exposto acima, j? que todos os componentes introduzidos na mistura seca apresentaram valores m?dios de tamanho de part?cula entre duas e onze vezes maior que o cimento. Fator este que colaborou para obten??o de uma mistura homog?nea ap?s vibra??o, pois o maior tamanho de part?cula dificultou uma poss?vel migra??o de aditivos para se??es inferiores da coluna sob vibra??o. / Dry mixtures for oil wells cementing have generated enough interest by the mere fact of collaborating with the cementing operations, once it is only added water in the mixture for obtain the cement slurry. With the intention of verify if the dry mixture properties attend in an effective way the needs which are required in the field, this work aims to formulate dry cementitious mixtures and evaluate the behavior of the mixture when subjected to different times of vibration, and this application focused on onshore oil wells. For this it was designed a column in a cylindrical shape with PVC pipes which the dry mixture was packed, subsequently being vibrated at times of 30, 60 and 120 minutes. Then the column was divided in three sections, and subjected to API test (American Petrolleum Institute) as rheology, loss of filtrate, thickening time, mud balance and compressive strength by ultrasonic method (UCA) to see if there was a difference in the properties of the cementitious slurry after vibration. Slurries were formulated to attend the depths of 400, 800 and 1200 meters for onshore wells. The results demonstrated that the dry mixture had a satisfactory reproducibility, once that didn?t have significant migration of additives to the sections of the column after vibration. This possible migration was measured by the API tests which proved similarities of properties between the optimized slurry and from the column. The results of the granulometric analysis also reinforce the exposed above, since all the components introduced into the dry mixture showed averages values of particle size between two and eleven times greater than the cement. This factor contributed to obtain a homogeneous mixture after vibration, because the larger particle size difficulted a possible migration of additives to lower sections of the column under vibration.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22554 |
| Date | 12 February 2016 |
| Creators | Pinto, Jorge Daniel Ara?jo |
| Contributors | 15724520800, http://lattes.cnpq.br/0022988322449627, Motta, Fabiana Villela da, 24779953839, http://lattes.cnpq.br/9918299069511517, N?brega, Andreza Kelly Costa, 02293726436, http://lattes.cnpq.br/9418395015529669, Martinelli, Antonio Eduardo |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, 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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