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Previous issue date: 2008-08-18 / Currently a resource more and more used by the petroleum industry to increase the efficiency of steam flood mechanism is the addition of solvents. The process can
be understood as a combination of a thermal method (steam injection) with a miscible method (solvent injection), promoting, thus, the reduction of interfacial tensions and
oil viscosity. The use of solvent alone tends to be limited because of its high cost. When co-injected with steam, the vaporized solvent condenses in the cooler regions of
the reservoir and mixes with the oil, creating a zone of low viscosity between the steam and the heavy oil. The mobility of the displaced fluid is then improved, resulting
in an increase of oil recovery. To better understand this improved oil recovery method, a numerical study of the process was done contemplating the effects of some
operational parameters (distance between wells, injection steam rate, kind of solvent and injected solvent volume)on the accumulated production of oil, recovery factor and
oil-steam rate. Semisynthetic models were used in this study but reservoir data can be extrapolated for practical applications situations on Potiguar Basin. Simulations were
performed in STARS (CMG, 2007.11). It was found that injected solvent volumes increased oil recovery and oil rates. Further the majority of the injected solvent was
produced and can be recycled / Um recurso cada vez mais utilizado pela ind?stria petrol?fera para aumentar a efici?ncia do mecanismo de inje??o de vapor ? a adi??o de solventes. O processo pode ser compreendido como a combina??o de um m?todo t?rmico (inje??o de vapor) com
um m?todo misc?vel (inje??o de solvente), promovendo, dessa forma, a redu??o das tens?es interfaciais e da viscosidade do ?leo. O uso do solvente sozinho tende a ser limitado, em fun??o do seu alto custo. Quando coinjetado com o vapor, o solvente
vaporizado condensa nas regi?es menos quentes do reservat?rio e mistura-se ao ?leo, criando uma zona de baixa viscosidade entre o vapor e o ?leo pesado. A mobilidade do
fluido deslocado ? ent?o melhorada, implicando num aumento do fator de recupera??o. Para melhor compreender esse mecanismo de recupera??o avan?ada, foi realizado um
estudo num?rico, onde se verificou a sensibilidade de alguns par?metros operacionais (dist?ncia entre po?os, vaz?o de inje??o de vapor, tipo de solvente injetado e quantidade de solvente) sobre a produ??o acumulada de ?leo, o fator de recupera??o e a raz?o ?leo-vapor. Neste estudo, foram utilizados modelos semi-sint?ticos, por?m com dados de reservat?rio que podem ser extrapolados para situa??es de aplica??es pr?ticas na Bacia Potiguar. As simula??es foram realizadas no m?dulo STARS (Steam, Thermal, and Advanced Processes Reservoir Simulator) do programa da CMG
(Computer Modelling Group), vers?o 2007.11. Os resultados mostraram que a presen?a do solvente nas quantidades analisadas melhorou os fatores de recupera??o e as vaz?es de ?leo. Al?m disso, a maior parte do solvente injetado foi produzido, podendo ser reciclado
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12883 |
| Date | 18 August 2008 |
| Creators | Galv?o, Edney Rafael Viana Pinheiro |
| Contributors | CPF:09599576420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706483T3, Pires, Adolfo Puime, CPF:08197874859, http://lattes.cnpq.br/2677117019767524, Barillas, Jennys Lourdes Meneses, CPF:00946709947, http://lattes.cnpq.br/4637897380055777, Dutra J?nior, Tarcilio Viana |
| 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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