【摘要】 本文系统讨论了石蜡指数、轻烃比值以及萘、菲指数等一系列成熟度参数。结果表明冀中坳陷北部存在一个明显的凝析油的熟化系列,它与生油岩的不同热演化作用阶段相对应。运用轻烃单体指纹特征及相似系数,不仅定性而且定量地进行了油-油以及油-岩间的直接对比,指出本区凝析油的源岩可能主要为下第三系生油岩。轻烃单体以及芳烃组成(萘、菲系列)具有敏感的热演化效应以及反映母源输入的性质,因此,它们对于高成熟地区(层系)的油气勘探以及油气初次运移等方面的研究,都将具有重要意义。更多还原

【Abstract】 A series of maturity parameters which involve paraffin wax index and light hydrocarbon ratios as well as naphthalene or phenanthrene index have been systemmatically studied in this paper.The results show that the conden- sates with the different levels of maturity exited in the northern Jizhong de- pression.It can be indirectly compared to indices used to characterize thermal maturity stages(e.g.vitrinite reflectance)of source rocks.By a fingerprint of the light hydrocarbon monomers and a similarity coefficient,direct correlatio- ns of oil/oil and /or oil/rock can be made not only qualitatively but also qu- antitatively.It is pointed out that condensates are mainly generated from me- dium and highly matured different types of Lower Tertiary source rock.更多还原