Simulação Numérica de Escoamentos Não Isotérmicos em Reservatórios de Shale Gas Considerando Aquecimento
DOI:
https://doi.org/10.63595/vetor.v36i1.20885Palavras-chave:
Adsorção, Escoamento não isotérmico, Simulação de reservatórios, Shale gas, EscorregamentoResumo
Este estudo aplica o Método dos Volumes Finitos para modelar o escoamento não isotérmico em reservatórios de gás de folhelho, considerando os efeitos de adsorção e escorregamento do gás. A análise concentra-se na recuperação avançada por meio do uso de aquecedores estáticos. O modelo proposto incorpora a permeabilidade absoluta dependente da temperatura, bem como a adsorção dependente da pressão e da temperatura. Uma formulação totalmente implícita é adotada, com linearização pelo método de Picard e solução dos sistemas resultantes por meio do método dos Gradientes Conjugados. Os resultados demonstram que a estimulação térmica melhora significativamente a produção de gás de folhelho. Em cenários de longo prazo, o uso de oito aquecedores aumentou a produção acumulada em até 24% em comparação com o caso sem aquecimento. Além disso, a análise de diferentes taxas de aquecimento revelou que o cenário de 80 kW apresenta o desempenho mais favorável, atingindo balanço energético positivo após aproximadamente 1900 dias e superando um ganho de eficiência de 30% ao longo de um período de 40 anos. Esses resultados destacam a importância dos efeitos térmicos, da adsorção e do escorregamento no escoamento não isotérmico de gás de folhelho, fornecendo insights valiosos para a otimização de estratégias de recuperação e para a melhoria da viabilidade econômica de métodos térmicos.
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