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Previous issue date: 2010-02-26 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / In Brazil and around the world, oil companies are looking for, and expected development of new technologies and processes that can increase the oil recovery factor in mature reservoirs,
in a simple and inexpensive way. So, the latest research has developed a new process called Gas Assisted Gravity Drainage (GAGD) which was classified as a gas injection IOR. The
process, which is undergoing pilot testing in the field, is being extensively studied through physical scale models and core-floods laboratory, due to high oil recoveries in relation to
other gas injection IOR. This process consists of injecting gas at the top of a reservoir through horizontal or vertical injector wells and displacing the oil, taking advantage of natural gravity
segregation of fluids, to a horizontal producer well placed at the bottom of the reservoir. To study this process it was modeled a homogeneous reservoir and a model of multi-component
fluid with characteristics similar to light oil Brazilian fields through a compositional simulator, to optimize the operational parameters. The model of the process was simulated in
GEM (CMG, 2009.10). The operational parameters studied were the gas injection rate, the type of gas injection, the location of the injector and production well. We also studied the
presence of water drive in the process. The results showed that the maximum vertical spacing between the two wells, caused the maximum recovery of oil in GAGD. Also, it was found that the largest flow injection, it obtained the largest recovery factors. This parameter controls the speed of the front of the gas injected and determined if the gravitational force dominates or not the process in the recovery of oil. Natural gas had better performance than CO2 and that the presence of aquifer in the reservoir was less influential in the process. In economic
analysis found that by injecting natural gas is obtained more economically beneficial than CO2 / No Brasil e no mundo, as empresas de petr?leo est?o ? procura, desenvolvimento e ? espera de novas tecnologias e processos que possam elevar o fator de recupera??o de ?leo em seus
reservat?rios, com um equilibrado custo-benef?cio. Na procura de novas tecnologias foi desenvolvido o processo de drenagem gravitacional assistida por g?s (GAGD Gas Assisted Gravity Drainage) que foi classificado dentro dos m?todos de recupera??o avan?ada de ?leo. O processo GAGD, que se encontra em fase de teste piloto em campo, est? sendo muito
estudado atrav?s de modelos f?sicos em escala de laborat?rio e em testemunhos, isto devido ?s altas recupera??es de ?leo em rela??o aos outros processos de inje??o de g?s. Este m?todo
consiste em injetar g?s no topo de um reservat?rio atrav?s de po?os injetores verticais ou horizontais e deslocar o ?leo, aproveitando a segrega??o gravitacional natural dos fluidos,
para um po?o produtor horizontal colocado na base do reservat?rio. Para estudar este processo foi idealizado um reservat?rio homog?neo e um modelo de fluido multicomponente com caracter?sticas parecidas aos campos de ?leo leve do Brasil para que, atrav?s de um simulador composicional, se analisem os par?metros operacionais. O processo foi simulado no programa comercial GEM da CMG (Computer Modelling Group). Os par?metros operacionais estudados foram a vaz?o de inje??o de g?s, o tipo de g?s injetado (g?s natural e CO2), a
localiza??o do po?o injetor e do po?o produtor. Tamb?m foi estudada a presen?a de aq??fero no processo. Os resultados mostraram que o m?ximo espa?amento vertical entre os dois
po?os, provocou a m?xima recupera??o de ?leo no GAGD. Tamb?m, verificou-se que a maiores vaz?es de inje??o, se obtiveram os maiores fatores de recupera??o. Este par?metro
controlou a velocidade da frente do g?s injetado e determinou se a for?a gravitacional domina ou n?o sobre o processo na recupera??o de ?leo. O g?s natural teve melhor desempenho que o CO2 e que, a presen?a de aq??fero no reservat?rio influenciou pouco no processo. Na an?lise econ?mica verificou-se que a inje??o de g?s natural obteve o melhor beneficio econ?mico que com CO2
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12914 |
| Date | 26 February 2010 |
| Creators | Bautista, Ernesto Vargas |
| Contributors | CPF:09453210404, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781404Z6, Barillas, Jennys Lourdes Meneses, CPF:00946709947, http://lattes.cnpq.br/4637897380055777, Dutra J?nior, Tarcilio Viana, CPF:09599576420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706483T3, Rocha, Paulo S?rgio de Melo Vieira, CPF:00627972802, http://lattes.cnpq.br/3605924506319698, 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/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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