辽河坳陷大民屯凹陷沙四段页岩油层矿物组分含量反演方法及应用

doi:10.11743/ogg20160106

Abstract

Abstract: Accurate characterization of mineral content is the key to evaluate its fractability for shale oil reservoir.Because of being rich in organic matter and with complex mineral composition,mineral evaluation with traditional volume model method is of low accuracy.This paper took the fourth member of the Shahejie Formation shale-oil reservoir in the Damintun Sag of Liaohe Depression,Bohai Bay Basin as an example.Bulk rock analysis and geochemistry test data were used to analyze lithology,mineral composition and curve response characteristics of the shale-oil reservoir,and then constructed the volume model and logging response equation suitable for the shale-oil reservoir.Genetic algorithm-based optimization method was utilized to calculate mineral composition,porosity and kerogen content.The calculation results showed that the mineral distribution predicted by multi-mineral inversion method was consistent with that of ECS,and its precision was obviously higher than that of linear fitting.The standards of shale-oil sweet spot were built in terms of oil-bearing property and fracability.The multi-mineral interpretation results can effectively guide sweet spot identification of shale oil.

Key words: volume model, mineral component, sweet spot, shale oil, Damintun Sag, Bohai Bay Basin

CLC Number:

TE122.2

Xiao Dianshi, Lu Shuangfang, Lu Zhengyuan, Zhang Luchuan, Guo Siqi, Gu Meiwei. Inversion method of shale oil reservoir mineral component content and its application in the Fourth Member of the Shahejie Formation in the Damintun Sag, Liaohe Depression[J]. Oil & Gas Geology, 2016, 37(1): 37-44.

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Inversion method of shale oil reservoir mineral component content and its application in the Fourth Member of the Shahejie Formation in the Damintun Sag, Liaohe Depression

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