Aplicação do Índice de Fragilidade em um intervalo de rocha geradora de lutito do Jurássico, Estudo de caso: Poço Poseidon 2, Bacia Browse, Austrália
DOI:
https://doi.org/10.22456/1807-9806.137321Palavras-chave:
Gás de folhelhos, registros de poço, carbono orgânico total, geomecânica de poços, mineralogia, regressão linear múltiplaResumo
Na exploração de petróleo/gás de lutito o uso do Índice de Fragilidade para identificar pontos-ideais tornou-se padrão. Esta prática pode ser imprecisa feita inapropriadamente. Este trabalho usou estatísticas básicas e gráficos de dispersão para identificar tendências e desempenho de quatro índices de fragilidade. Nos resultados, os índices pareceram similares nos registros e com valores mais altos em litologias de arenitos. A sensibilidade para parâmetros como o Carbono Orgânico Total, Porosidade, Mineralogia e fluido, variou entre os índices. A relação da fragilidade com as propriedades da rocha está principalmente ligada às características de desenho dos índices. A seleção do índice de fragilidade deveria ser feita considerando que algumas propriedades podem afetar de maneira positiva ou negativa. Desde este trabalho, a aplicação do índice de fragilidade é entendida em uma forma mais prática com respeito às considerações básicas a incluir na avaliação de Plays de lutitos.
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