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Estudo de sistemas multicomponentes no processo de inje??o c?clica de vaporCarvalho, Tiago Pinheiro de 18 September 2010 (has links)
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Previous issue date: 2010-09-18 / In Brazilian Northeast there are reservoirs with heavy oil, which use steam flooding as a
recovery method. This process allows to reduce oil viscosity, increasing its mobility and
consequently its oil recovery. Steam injection is a thermal method and can occurs in
continues or cyclic form. Cyclic steam stimulation (CSS) can be repeated several times.
Each cycle consisting of three stages: steam injection, soaking time and production
phase. CSS becomes less efficient with an increase of number of cycles. Thus, this work
aims to study the influence of compositional models in cyclic steam injection and the
effects of some parameters, such like: flow injection, steam quality and temperature of
steam injected, analyzing the influence of pseudocomponents numbers on oil rate,
cumulative oil, oil recovery and simulation time. In the situations analyzed was
compared the model of fluid of three phases and three components known as Blackoil .
Simulations were done using commercial software (CMG), it was analyzed a
homogeneous reservoir with characteristics similar to those found in Brazilian
Northeast. It was observed that an increase of components number, increase the time
spent in simulation. As for analyzed parameters, it appears that the steam rate, and
steam quality has influence on cumulative oil and oil recovery. The number of
components did not a lot influenced on oil recovery, however it has influenced on gas
production / No Nordeste brasileiro existem reservat?rios de ?leos pesados, nos quais se utiliza a inje??o
de vapor como m?todo de recupera??o. Este processo permite diminuir a viscosidade do ?leo,
aumentando a sua mobilidade e melhorando o volume de ?leo a ser recuperado. A inje??o de
vapor ? um m?todo t?rmico e ocorre na forma cont?nua ou c?clica. A inje??o c?clica de vapor
pode ser repetida diversas vezes. Cada ciclo consiste de tr?s etapas distintas: a fase de inje??o,
fase de fechamento (soaking) e fase de produ??o. A inje??o c?clica se torna menos eficiente ?
medida que o n?mero de ciclos aumenta. Neste sentido, este trabalho visa estudar a influ?ncia
de modelos composicionais na inje??o c?clica de vapor e os efeitos de alguns par?metros, tais
como: vaz?o de inje??o, qualidade do vapor e temperatura do vapor injetado; analisando a
influ?ncia do n?mero de pseudocomponentes, no que diz respeito ? vaz?o de ?leo, produ??o
acumulada de ?leo, fator de recupera??o e tempo de simula??o. Nas situa??es analisadas foi
comparado o modelo de fluido de tr?s fases e tr?s componentes conhecido como Black-oil .
Foram realizadas simula??es, utilizando um simulador comercial a partir de um modelo de
reservat?rio homog?neo com caracter?sticas similares ?s encontradas no Nordeste brasileiro.
Observou-se que quanto maior o n?mero de componentes, maior ? o tempo gasto na
simula??o. J? para os par?metros analisados, verifica-se que a vaz?o de inje??o de vapor e a
qualidade do vapor influenciam na produ??o acumulada de ?leo e no fator de recupera??o. O
n?mero de componentes n?o exerceu muita influ?ncia na produ??o acumulada, nem no fator
de recupera??o de ?leo, por?m foi significativa na produ??o de g?s do sistema
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Estudo de modelos composicionais de ?leo na inje??o cont?nua de vaporCavalcante, Liara Tavares 22 December 2011 (has links)
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Previous issue date: 2011-12-22 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The objective of the thermal recovery is to heat the resevoir and the oil in it to increase its recovery. In the Potiguar river basin there are located several heavy oil reservoirs whose
primary recovery energy provides us with a little oil flow, which makes these reservoirs great candidates for application of a method of recovery advanced of the oil, especially the
thermal. The steam injection can occur on a cyclical or continuous manner. The continuous steam injection occurs through injection wells, which in its vicinity form a zone of steam that expands itself, having as a consequence the displace of the oil with viscosity and mobility improved towards the producing wells. Another possible mechanism of displacement of oil in
reservoirs subjected to continuous injection of steam is the distillation of oil by steam, which at high temperatures; their lighter fractions can be vaporized by changing the composition of
the oil produced, of the oil residual or to shatter in the amount of oil produced. In this context, this paper aims to study the influence of compositional models in the continuous injection of
steam through in the analysis of some parameters such as flow injection steam and temperature of injection. Were made various leading comparative analysis taking the various models of fluid, varying from a good elementary, with 03 pseudocomponents to a modeling of fluids with increasing numbers of pseudocomponents. A commercial numerical simulator was used for the study from a homogeneous reservoir model with similar features to those found
in northeastern Brazil. Some conclusions as the increasing of the simulation time with increasing number of pseudocomponents, the significant influence of flow injection on cumulative production of oil and little influence of the number of pseudocomponents in the flows and cumulative production of oil were found / O objetivo da recupera??o t?rmica ? aquecer o reservat?rio e o ?leo nele existente para aumentar a sua recupera??o. Na Bacia Potiguar existem v?rios reservat?rios de ?leos pesados cuja energia de recupera??o prim?ria nos fornece uma vaz?o de ?leo pequena, o que torna tais reservat?rios ?timos candidatos para aplica??o de um m?todo de recupera??o avan?ada de
petr?leo, especialmente o t?rmico. A inje??o de vapor pode ocorrer de forma c?clica ou cont?nua. A inje??o de vapor cont?nua ocorre atrav?s de po?os injetores, pr?ximos aos quais
se forma uma zona de vapor que se expande, tendo como conseq??ncia o deslocamento do ?leo com viscosidade e mobilidade melhoradas na dire??o dos po?os produtores. Outro
mecanismo poss?vel de deslocamento do ?leo em reservat?rios submetidos ? inje??o cont?nua de vapor ? a destila??o do ?leo por vapor, o qual quando alcan?am altas temperaturas, suas
fra??es mais leves podem ser vaporizadas alterando a composi??o do ?leo produzido, do ?leo residual ou impactar na quantidade de ?leo produzida. Nesse contexto, este trabalho objetiva estudar a influ?ncia de modelos composicionais na inje??o cont?nua de vapor atrav?s de uma an?lise de par?metros como vaz?o de inje??o de vapor e temperatura de inje??o. Foram
realizadas diversas an?lises comparativas levando os diversos modelos de fluidos, variando de um bem elementar, com 03 pseudocomponentes at? modelagens de fluidos com n?meros
crescentes de pseudocomponentes. Foi utilizado um simulador num?rico comercial para o estudo a partir de um modelo de reservat?rio homog?neo com caracter?sticas similares ?s
encontradas no Nordeste brasileiro. Algumas conclus?es como o aumento do tempo de simula??o com o aumento do n?mero de pseudocomponentes, a influ?ncia significativa da vaz?o de inje??o na produ??o acumulada de ?leo e a pouca influ?ncia do n?mero de pseudocomponentes nas vaz?es e produ??o acumulada de ?leo foram constatadas
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