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Previous issue date: 2014-12-15 / A combust?o in situ (CIS) ? o m?todo de recupera??o t?rmico mais antigo. Este
m?todo consiste na queima parcial do ?leo in situ, cujo objetivo ? gerar uma frente de
combust?o que ajude no movimento do ?leo. Essa frente de combust?o aquece as zonas
pr?ximas, logrando a redu??o da viscosidade do ?leo e permitindo o seu deslocamento at? o
po?o produtor. Apesar de parecer um processo f?cil, a combust?o in situ engloba uma s?rie de
mecanismos complexos que mesmo na atualidade a torna dif?cil de representar atrav?s de
modelos anal?ticos, f?sicos e de simula??o num?rica. O objetivo do trabalho ? analisar e
determinar os par?metros que t?m influ?ncia no processo, destacando a cin?tica (energia de
ativa??o, coeficiente de Arrhenius e porcentagem de craqueamento para a produ??o de coque
durante o processo) de tr?s diferentes modelos de rea??es qu?micas e da vaz?o de inje??o do
ar. Para verificar a aplicabilidade do processo no Brasil foi realizado um estudo de simula??o
em reservat?rios de ?leo pesado com caracter?sticas do Nordeste Brasileiro. As simula??es
foram realizadas utilizando o m?dulo ?STARS? da ?Computer Modelling Group?, com o
objetivo de realizar estudos de m?todos de recupera??o avan?ada de ?leo. Dentre todos os
par?metros analisados, a energia de ativa??o-fator pr?-exponencial apresentou a maior
influ?ncia, ou seja, quanto menor o valor da energia de ativa??o-fator pr?-exponencial maior a
fra??o de ?leo recuperada. A porcentagem de craqueamento mostrou uma forte influ?ncia no
processo, devido a que enquanto menor for a quantidade de coque formado maior ? volume de
?leo recuperado. / In situ Combustion (CIS) is the oldest thermal method of oil recovery. This method
consists of partial combustion of in situ oil, its goal is to generate a combustion front that
helps to move the oil. This combustion front will heat the surrounding areas, achieving a
reduction in oil viscosity and allowing its displacement into the production well. It may seem
a simple process, however in situ combustion involves a series of complex mechanisms that
difficult until today its representation through analytical models, physical models and
numerical simulation. The aim of this investigation is to analyze and determine the parameters
that influence the process, highlighting the kinetics of the process (activation energy,
Arrhenius coefficient and percentage of cracking for the production of coke) three different
models of chemical reactions and the air injection rate. To verify the applicability of the
process in Brazil a simulation study was conducted in heavy oil reservoirs with characteristics
of the Brazilian Northeast. The simulations were performed using the "STARS" module from
the "Computer Modelling Group", which objective is to study methods of enhanced oil
recovery. Among all the analyzed parameters, the activation energy-pre-exponential factor
showed the greatest influence, that is, the lower the value of the activation energy-preexponential
factor the higher the fraction of oil recovery. The cracking percentage also
showed a strong influence in the process, the smaller the amount of coke formed the larger
volume of oil recovery.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19734 |
| Date | 15 December 2014 |
| Creators | Tarifa, Jhon Mor?n |
| Contributors | 00946709947, http://lattes.cnpq.br/4637897380055777, Dutra J?nior, Tarcilio Viana, 09599576420, http://lattes.cnpq.br/8753782475740001, Medeiros, Ana Catarina da Rocha, 67215793400, http://lattes.cnpq.br/8013591667991638, Barillas, Jennys Lourdes Meneses |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE PETR?LEO, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| 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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