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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo param?trico da segrega??o gravitacional na inje??o cont?nua de vapor

Rodrigues, Marcos Allyson Felipe 18 August 2008 (has links)
Made available in DSpace on 2014-12-17T14:08:30Z (GMT). No. of bitstreams: 1 MarcosAFR.pdf: 4078279 bytes, checksum: 366f0859503e4c45e56db94e388e42e4 (MD5) Previous issue date: 2008-08-18 / Steam injection is the most used method of additional recovery for the extraction of heavy oil. In this type procedure is common to happen gravitational segregation and this phenomenon can affect the production of oil and therefore, it shoulds be considered in the projects of continuous steam injection. For many years, the gravitational segregation was not adequately considered in the calculation procedures in Reservoir Engineering. The effect of the gravity causes the segregation of fluids inside the porous media according to their densities. The results of simulation arising from reservoirs could provide the ability to deal with the gravity, and it became apparent that the effects of the gravity could significantly affect the performance of the reservoir. It know that the gravitational segregation can happen in almost every case where there is injection of light fluid, specially the steam, and occurs with greater intensity for viscous oil reservoirs. This work discusses the influence of some parameters of the rock-reservoir in segregation as viscosity, permeability, thickness, cover gas, porosity. From a model that shows the phenomenon with greater intensity, optimized some operational parameters as the rate flow rate steam, distance between the wells injector-producer, and interval of completion which contributed to the reduction in gravity override, thus increasing the oil recovery. It was shown a greater technical-economic viability for the model of distance between the wells 100 m. The analysis was performed using the simulator of CMG (Computer Modeling Group-Stars 2007.11, in which was observed by iterating between studied variables in heavy oil reservoirs with similar characteristics to Brazilian Northeast / A inje??o de vapor ? o m?todo de recupera??o suplementar mais utilizado para a recupera??o de ?leos pesados. Neste tipo de processo ? comum acontecer a segrega??o gravitacional e este fen?meno pode afetar a produ??o de ?leo e, por isso, deve ser considerado nos projetos de inje??o cont?nua de vapor. Por muitos anos, a segrega??o gravitacional n?o era adequadamente considerada em procedimentos de c?lculo em Engenharia de Reservat?rios. O efeito da gravidade faz com que ocorra a segrega??o de fluidos, isto ?, os fluidos tendem a se arranjar dentro do meio poroso de acordo com as suas densidades. Os resultados advindos de simula??o de reservat?rios forneceram a capacidade para lidar com a gravidade, e tornou-se aparente que os efeitos da gravidade poderiam afetar significativamente o desempenho do reservat?rio. Sabe-se que a segrega??o gravitacional pode ocorrer em quase todos os casos onde h? inje??o de fluidos leves, especialmente o vapor, e ocorre com maior intensidade para reservat?rios de ?leos viscosos. Neste trabalho ? abordada a influ?ncia de alguns par?metros da rocha-reservat?rio na segrega??o como viscosidade, permeabilidade, espessura, capa de g?s e porosidade. A partir de um modelo que apresenta o fen?meno com maior intensidade, otimizaram-se alguns par?metros operacionais como vaz?o de inje??o de vapor, dist?ncia entre os po?os injetor-produtor e intervalo de completa??o que contribu?ram para a redu??o do efeito, aumento assim o fator de recupera??o. Foi mostrada uma maior viabilidade t?cnica-econ?mica para o modelo de dist?ncia entre os po?os de 100 m. A an?lise foi realizada utilizando o simulador comercial da CMG (Computer Modelling Group) - Stars 2007.11, onde foi observada a intera??o entre as vari?veis estudadas em reservat?rios com caracter?sticas semelhantes aos encontrados no Nordeste brasileiro

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