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Previous issue date: 2010-12-17 / Oil production and exploration techniques have evolved in the last decades in order to
increase fluid flows and optimize how the required equipment are used. The base functioning
of Electric Submersible Pumping (ESP) lift method is the use of an electric downhole motor
to move a centrifugal pump and transport the fluids to the surface. The Electric Submersible
Pumping is an option that has been gaining ground among the methods of Artificial Lift due
to the ability to handle a large flow of liquid in onshore and offshore environments. The
performance of a well equipped with ESP systems is intrinsically related to the centrifugal
pump operation. It is the pump that has the function to turn the motor power into Head. In this
present work, a computer model to analyze the three-dimensional flow in a centrifugal pump
used in Electric Submersible Pumping has been developed. Through the commercial program,
ANSYS? CFX?, initially using water as fluid flow, the geometry and simulation parameters
have been defined in order to obtain an approximation of what occurs inside the channels of
the impeller and diffuser pump in terms of flow. Three different geometry conditions were
initially tested to determine which is most suitable to solving the problem. After choosing the
most appropriate geometry, three mesh conditions were analyzed and the obtained values
were compared to the experimental characteristic curve of Head provided by the
manufacturer. The results have approached the experimental curve, the simulation time and
the model convergence were satisfactory if it is considered that the studied problem involves
numerical analysis. After the tests with water, oil was used in the simulations. The results
were compared to a methodology used in the petroleum industry to correct viscosity. In
general, for models with water and oil, the results with single-phase fluids were coherent with
the experimental curves and, through three-dimensional computer models, they are a
preliminary evaluation for the analysis of the two-phase flow inside the channels of
centrifugal pump used in ESP systems / As t?cnicas de explora??o e produ??o de petr?leo t?m evolu?do nas ?ltimas d?cadas no
sentido de incrementar as vaz?es de fluido e otimizar a utiliza??o dos equipamentos
empregados. A base do funcionamento do m?todo de eleva??o por Bombeio Centr?fugo
Submerso (BCS) ? a utiliza??o de um motor el?trico de fundo para movimentar uma bomba
centr?fuga e transportar os fluidos at? a superf?cie. O Bombeio Centr?fugo Submerso ? uma
op??o que vem ganhando espa?o entre os m?todos de Eleva??o Artificial em fun??o da
capacidade de trabalhar com grandes vaz?es de l?quido em ambientes terrestres ou mar?timos.
O desempenho de um po?o equipado com eleva??o por BCS est? intrinsecamente relacionado
ao funcionamento da bomba centr?fuga que faz parte do sistema. ? ela que tem a fun??o de
transformar a pot?ncia cedida pelo motor em altura de eleva??o ou Head. Neste trabalho foi
desenvolvido um modelo computacional para analisar o escoamento tridimensional em uma
bomba centr?fuga utilizada em Bombeio Centr?fugo Submerso. Atrav?s do programa
comercial, o CFX? ANSYS?, inicialmente utilizando a ?gua como fluido, foram definidos a
geometria e os par?metros de simula??o de forma que, fosse obtida, uma aproxima??o do que
ocorre no interior dos canais do impelidor e do difusor da bomba em termos de escoamento.
Tr?s diferentes condi??es de geometria foram inicialmente testadas para verificar qual a mais
adequada ? resolu??o do problema. Ap?s a escolha da geometria mais adequada, tr?s
condi??es de malha foram analisadas e os valores obtidos foram comparados ? curva
caracter?stica experimental de altura de eleva??o fornecida pelo fabricante. Os resultados se
aproximaram da curva experimental, o tempo de simula??o e a converg?ncia do modelo foram
satisfat?rios se for considerado que o problema estudado envolve an?lise num?rica. Ap?s os
testes com a ?gua, um ?leo, foi utilizado nas simula??es. Os resultados foram comparados a
uma metodologia utilizada na ind?stria do petr?leo para corre??o da viscosidade. De uma
forma geral, para os modelos com ?gua e com o ?leo, os resultados com os fluidos
monof?sicos se mostraram coerentes com as curvas experimentais e s?o uma avalia??o
preliminar para a an?lise, atrav?s de modelos computacionais tridimensionais, do escoamento
bif?sico no interior dos canais da bomba centr?fuga utilizada em sistemas de BCS
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13009 |
| Date | 17 December 2010 |
| Creators | Maitelli, Carla Wilza Souza de Paula |
| Contributors | CPF:09453210404, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781404Z6, Bezerra, Vanja Maria de Fran?a, CPF:41227883404, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785344U5, Lima, Ant?nio Gilson Barbosa de, CPF:43667660430, http://lattes.cnpq.br/4527387699298544, Assmann, Benno Waldemar, CPF:75841312715, Estevam, Valdir, CPF:00000000007, http://lattes.cnpq.br/9264004380006248, Mata, Wilson da |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia do Petr?leo, UFRN, BR, Pesquisa e Desenvolvimento em Ci?ncia e Engenharia de Petr?leo |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| 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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