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针对泌阳凹陷下第三系核三段的原油和烃源岩,利用地球化学的方法进行生物标志物和碳同位素分析,其结果表明核三上亚段和下亚段的原油和烃源岩的伽马蜡烷和三环萜烷参数、Pr/Ph与Ph/nC18比值及其分布趋势、以及族组分碳同位素值均存在较大的差异,核三上、下亚段的原油分别来源于核三上亚段和下亚段的烃源岩。进一步探讨认为核三上、下亚段油源差异的主要原因为沉积环境的改变。该研究结果为核三段的油源对比和油气藏研究提供了重要的依据。
For the crude oil and source rocks of the third member of the third member of the Miocene Depression, biomarkers and carbon isotope analyzes using geochemical methods show that the crude oil and source rocks in the Upper Triassic and Lower Submember of the Upper Triassic , The ratio of Pr / Ph to Ph / nC18 and their distribution trends, as well as the carbon isotope values of the ethnic components are quite different. The crude oil source of the upper, Source rocks in the Upper Triassic and Lower Submember of the core. To further explore that the main reason for the difference of oil source in the upper and lower subbasins of the Third Triassic is the change of sedimentary environment. The results of this study provide an important basis for oil source correlation and reservoir research in the third member of the core.