Avaliação da técnica de recuperação microbiológica de hidrocarbonetos como alternativa para recuperação avançada de óleo
Data
2022-02-25
Autores
Pio, Yasmin Coelho 
Orientadores
Komesu, Andrea
Tipo
Dissertação de mestrado
Título da Revista
ISSN da Revista
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Resumo
O aumento na demanda por petróleo e o crescente número de campos maduros, com pouca produtividade tem incentivado a busca por melhores técnicas para maximizar a recuperação de óleo. Existem diversas técnicas avançadas de recuperação de óleo na literatura, entretanto, a recuperação microbiológica de hidrocarbonetos (Microbial Enhanced Oil Recovery - MEOR), que consiste em utilizar atividade bacteriana para aumentar a produção de óleo, se mostra como uma opção economicamente e ambientalmente viável que não é tão explorada pelas empresas petrolíferas. Porém, em alguns casos, essa técnica tem limitações e requer estudos para a aplicação de seus diversos efeitos. Assim, esse trabalho avaliou o comportamento desse processo através de simulações numéricas da mudança da molhabilidade, causada por produção bacteriana de biossurfactantes, um de seus principais efeitos em um modelo de reservatório simplificado. Foi observado um aumento no fator de recuperação do óleo para tal efeito quando comparado com injeção individual de água para todos os modelos de fluido analisados. O aumento de recuperação foi relacionado com a mudança da molhabilidade, constatada através da mudança nas curvas de permeabilidade relativa. Nessas curvas, foi analisado uma redução da saturação de óleo residual, em que o valor da máxima quantidade de óleo no reservatório que pode ser extraída aumentou de 78% para 90%. É esperado que este estudo seja utilizado como base para futuras aplicações de simulações numéricas de reservatórios para este método de EOR, tendo em vista que este método não é amplamente citado na literatura, além disso, os modelos simulados no software comercial estão sujeitos a diversas simplificações e premissas.
The increase in demand for oil and the growing number of mature fields with low productivity has encouraged the search for better techniques to maximize oil recovery. There are several advanced oil recovery techniques in the literature, however, the microbiological recovery of hydrocarbons (Microbial Enhanced Oil Recovery - MEOR), which consists of using bacterial activity to increase oil production, has been shown economically and environmentally viable and it is not as exploited by the oil companies. However, in some cases, this technique has limitations and requires studies to analyze the possibility of application of its various effects. Thus, this work evaluated the behavior of this process through numerical simulations of the change in wettability, caused by bacterial production of biosurfactants, one of its main effects, in a simplified reservoir model. For this effect, it was observed an increase in the oil recovery, when compared to individual injection of water for all fluid models analyzed. The increase in oil recovery was related to the change in wettability, verified through the change in the relative permeability curves. In these curves, a reduction in residual oil saturation was analyzed, in which the value of the maximum amount of oil in the reservoir that can be extracted increased from 78% to 90%. It is expected that this study can be used as a basis for future applications of numerical simulations of reservoirs for this EOR method, given that this method is not widely cited in the literature, in addition, the models simulated in commercial software are subject to several simplifications. and premises.
The increase in demand for oil and the growing number of mature fields with low productivity has encouraged the search for better techniques to maximize oil recovery. There are several advanced oil recovery techniques in the literature, however, the microbiological recovery of hydrocarbons (Microbial Enhanced Oil Recovery - MEOR), which consists of using bacterial activity to increase oil production, has been shown economically and environmentally viable and it is not as exploited by the oil companies. However, in some cases, this technique has limitations and requires studies to analyze the possibility of application of its various effects. Thus, this work evaluated the behavior of this process through numerical simulations of the change in wettability, caused by bacterial production of biosurfactants, one of its main effects, in a simplified reservoir model. For this effect, it was observed an increase in the oil recovery, when compared to individual injection of water for all fluid models analyzed. The increase in oil recovery was related to the change in wettability, verified through the change in the relative permeability curves. In these curves, a reduction in residual oil saturation was analyzed, in which the value of the maximum amount of oil in the reservoir that can be extracted increased from 78% to 90%. It is expected that this study can be used as a basis for future applications of numerical simulations of reservoirs for this EOR method, given that this method is not widely cited in the literature, in addition, the models simulated in commercial software are subject to several simplifications. and premises.
Descrição
Citação
PIO, Yasmin Coelho. Avaliação da técnica de recuperação microbiológica de hidrocarbonetos como alternativa para recuperação avançada de óleo. 2022. 110 f. Dissertação (Mestrado em Bioprodutos e Bioprocessos) - Instituto de Saúde e Sociedade, Universidade Federal de São Paulo, Santos, 2022.