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Previous issue date: 2013-11-06 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Nowadays, most of the hydrocarbon reserves in the world are in the form of heavy oil,
ultra - heavy or bitumen. For the extraction and production of this resource is required to
implement new technologies. One of the promising processes for the recovery of this oil is the
Expanding Solvent Steam Assisted Gravity Drainage (ES-SAGD) which uses two parallel
horizontal wells, where the injection well is situated vertically above the production well. The
completion of the process occurs upon injection of a hydrocarbon additive at low
concentration in conjunction with steam. The steam adds heat to reduce the viscosity of the oil
and solvent aids in reducing the interfacial tension between oil/ solvent. The main force acting
in this process is the gravitational and the heat transfer takes place by conduction, convection
and latent heat of steam. In this study was used the discretized wellbore model, where the well
is discretized in the same way that the reservoir and each section of the well treated as a block
of grid, with interblock connection with the reservoir. This study aims to analyze the
influence of the pressure drop and heat along the injection well in the ES-SAGD process. The
model used for the study is a homogeneous reservoir, semi synthetic with characteristics of
the Brazilian Northeast and numerical simulations were performed using the STARS thermal
simulator from CMG (Computer Modelling Group). The operational parameters analyzed
were: percentage of solvent injected, the flow of steam injection, vertical distance between the
wells and steam quality. All of them were significant in oil recovery factor positively
influencing this. The results showed that, for all cases analyzed, the model considers the
pressure drop has cumulative production of oil below its respective model that disregards such
loss. This difference is more pronounced the lower the value of the flow of steam injection / Atualmente, a maior parte das reservas de hidrocarbonetos no mundo se encontram na
forma de ?leo pesado, ultra-pesado ou betume. Para a extra??o e produ??o desse recurso ?
necess?ria a implanta??o de novas tecnologias. Um dos processos promissores para a
recupera??o desse ?leo ? a drenagem gravitacional assistida com vapor e solvente (ESSAGD)
que utiliza dois po?os horizontais paralelos, onde o injetor ? disposto acima do
produtor. A realiza??o do processo se d? mediante a inje??o de um aditivo de hidrocarboneto
em baixa concentra??o em conjunto com vapor. O vapor contribui com calor para redu??o da
viscosidade do ?leo e o solvente ajuda na miscibilidade, reduzindo a tens?o interfacial entre
?leo/solvente. A principal for?a atuante neste processo ? a gravitacional e a transfer?ncia de
calor ocorre por meio da condu??o, convec??o e pelo calor latente do vapor. Neste estudo foi
utilizado o modelo discretizado, onde o po?o ? discretizado da mesma forma que o
reservat?rio, sendo cada se??o do po?o tratada como um bloco da grade, com conex?o
interblocos com o reservat?rio. O presente trabalho tem como objetivo analisar a influ?ncia da
perda de carga e calor ao longo do po?o injetor no processo ES-SAGD. O modelo utilizado
para estudo trata-se de um reservat?rio homog?neo, semissint?tico com caracter?sticas do
Nordeste Brasileiro e as simula??es num?ricas foram realizadas atrav?s do simulador t?rmico
STARS da CMG (Computer Modelling Group). Os par?metros operacionais analisados
foram: porcentagem de solvente injetado, vaz?o de inje??o de vapor, dist?ncia vertical entre
os po?os e qualidade de vapor. Todos eles foram significativos no Fator de Recupera??o de
?leo. Os resultados demonstraram que, para todos os casos analisados, o modelo que
considera a perda de carga apresenta produ??o acumulada de ?leo inferior ao seu respectivo
modelo que desconsidera tal perda. Essa diferen?a ? mais acentuada quanto menor o valor da
vaz?o de inje??o de vapor
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12991 |
| Date | 06 November 2013 |
| Creators | Praxedes, Tayllandya Suelly |
| Contributors | CPF:00946709947, http://lattes.cnpq.br/4637897380055777, Dutra J?nior, Tarcilio Viana, CPF:09599576420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706483T3, Mata, Wilson da, CPF:09453210404, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781404Z6, Souza J?nior, Jos? Cleodon de, CPF:32197462334, Barillas, Jennys Lourdes Meneses |
| 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/masterThesis |
| 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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