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Previous issue date: 2012-09-03 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Many of hydrocarbon reserves existing in the world are formed by heavy oils (?API
between 10 and 20). Moreover, several heavy oil fields are mature and, thus, offer great
challenges for oil industry. Among the thermal methods used to recover these resources,
steamflooding has been the main economically viable alternative. Latent heat carried by steam
heats the reservoir, reducing oil viscosity and facilitating the production. This method has many
variations and has been studied both theoretically and experimentally (in pilot projects and in full
field applications). In order to increase oil recovery and reduce steam injection costs, the
injection of alternative fluid has been used on three main ways: alternately, co-injected with
steam and after steam injection interruption. The main objective of these injection systems is to
reduce the amount of heat supplied to the reservoir, using cheaper fluids and maintaining the
same oil production levels. This works discusses the use of carbon dioxide, nitrogen, methane
and water as an alternative fluid to the steam. The analyzed parameters were oil recoveries and
net cumulative oil productions. The reservoir simulation model corresponds to an oil reservoir of
100 m x 100 m x 28 m size, on a Cartesian coordinates system (x, y and z directions). It is a semi
synthetic model with some reservoir data similar to those found in Brazilian Potiguar Basin. All
studied cases were done using the simulator STARS from CMG (Computer Modelling Group,
version 2009.10). It was found that waterflood after steam injection interruption achieved the
highest net cumulative oil compared to other fluids injection. Moreover, it was observed that
steam and alternative fluids, co-injected and alternately, did not present increase on profitability
project compared with steamflooding / Muitas das reservas de hidrocarbonetos existentes em todo o mundo s?o formadas por
?leos pesados (?API entre 10 e 20). Al?m disso, v?rios campos de ?leo pesado est?o maduros e,
portanto, oferecem grandes desafios para a ind?stria do petr?leo. Entre os m?todos t?rmicos
utilizados para recuperar estes recursos, a inje??o de vapor tem sido a principal alternativa
economicamente vi?vel. O calor latente transportado por meio de vapor aquece o reservat?rio,
reduzindo a viscosidade do ?leo, facilitando a produ??o. A fim de aumentar a recupera??o de
?leo e reduzir os custos inerentes ? inje??o de vapor, a inje??o de fluidos alternativos tem sido
utilizado em combina??o com o vapor das seguintes formas: alternadamente, coinjetados e ap?s a
interrup??o da inje??o de vapor. O objetivo principal destes sistemas de inje??o combinada ?
reduzir a quantidade de calor fornecida ao reservat?rio utilizando fluidos de menor valor
comercial, buscando manter os n?veis de produ??o de ?leo. Este trabalho analisa o uso do di?xido
de carbono, nitrog?nio, metano e ?gua como fluido alternativo ao vapor. Os par?metros
analisados foram a recupera??o de ?leo e a produ??o acumulada l?quida. O modelo de
reservat?rio analisado corresponde a um reservat?rio de dimens?es 100 m x 100 m x 28 m, num
sistema de coordenadas cartesianas ( dire??es x, y e z). ? um modelo semissint?tico com alguns
dados de reservat?rio semelhantes aos encontrados na Bacia Potiguar, Brasil. Todos os casos
estudados foram simulados utilizando o simulador STARS da CMG (Computer Group,
Modelagem vers?o 2009.10). Verificou-se que a inje??o de ?gua ap?s a interrup??o de inje??o de
vapor alcan?ou melhores resultados em termos de produ??o acumulada l?quida de ?leo em
rela??o a inje??o de outros fluidos. Al?m disso, foi observado que o vapor e os fluidos
alternativos, coinjetados e alternados, n?o apresentou aumento na rentabilidade do projeto em
compara??o com a inje??o cont?nua de vapor
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13019 |
| Date | 03 September 2012 |
| Creators | Rodrigues, Marcos Allyson Felipe |
| Contributors | CPF:09453210404, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781404Z6, Lins J?nior, Abel Gomes, CPF:14334968449, http://lattes.cnpq.br/1051102659037756, Lima, Ant?nio Gilson Barbosa de, CPF:43667660430, http://lattes.cnpq.br/4527387699298544, Barillas, Jennys Lourdes Meneses, CPF:00946709947, http://lattes.cnpq.br/4637897380055777, 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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