Modelagem matemática do armazenamento geológico de CO2: análise da eficiência da incorporação do efeito da histerese na permeabilidade relativa e pressão capilar
DOI:
https://doi.org/10.21712/lajer.2025.v12.n3.p10-19Palavras-chave:
dióxido de carbono; armazenamento de carbono; aprisionamento capilar; histerese; modelagem numérica.Resumo
O armazenamento geológico de CO₂ é uma das principais estratégias para mitigação das emissões de gases de efeito estufa. Este estudo analisa o efeito da histerese nas curvas de pressão capilar (Pc) e permeabilidade relativa (kr), fundamentais para compreender o comportamento multifásico do CO₂ em meios porosos. Com base nos modelos de Brooks–Corey (1964) e Killough (1976), e em dados recentes da literatura, observou-se que a consideração da histerese altera significativamente as curvas de Pc e kr, aumentando o aprisionamento capilar e residual, reduzindo a mobilidade do CO₂. Os resultados indicam que modelos histeréticos fornecem previsões mais realistas e seguras sobre a eficiência e a estabilidade do armazenamento geológico de carbono, sobretudo em ciclos de injeção do gás.
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