渤海湾盆地青东凹陷古近系原油地球化学特征及油源分析

发布时间：2018-06-04 14:33

  本文选题：生物降解油 + 生物标志物　； 参考：《石油实验地质》2017年03期

【摘要】：渤海湾盆地济阳坳陷青东凹陷存在常规原油和生物降解油。选取新参数β-胡萝卜烷/(2×C_(29)藿烷)、伽马蜡烷/(2×C_(29)藿烷),三环萜烷系列参数(2×C_(24)四环萜烷)/(C_(26)三环萜烷)、(2×C_(19))/(C_(28)+C_(29))三环萜烷以及?/菲,结合C_(29) 4-甲基甾烷及碳同位素特征等,将该区原油划分为Ⅰ、Ⅱ、Ⅲ和Ⅳ等4类,烃源岩划分为A、B_1和B_2等3类。Ⅰ类原油来自青东凹陷中北部深洼的沙三下亚段成熟烃源岩,Ⅱ类原油来自凹陷南部沙四上亚段烃源岩,Ⅲ类原油来自中北部洼陷的沙四上亚段烃源岩,Ⅳ类原油来自青南洼陷沙四上亚段烃源岩,而青东8井原油应有青东凹陷南部烃源岩的贡献。
[Abstract]:Conventional crude oil and biodegradable oil exist in Qingdong Sag, Jiyang Depression, Bohai Bay Basin. A new parameter, 尾 -carrodane / 2 脳 Che / C _ (29) cariane, gamma-paraffin / _ 2 脳 C ~ (29) hopane, tricyclic terpene, tricyclic terpene (2 脳 C ~ (+) C ~ (+) ~ (24) ~ (2 脳 C ~ (19) P / C ~ (28) C ~ (29) C ~ (29) C ~ (29), etc.) trichloroterpene and its / phenanthrene, combined with C _ (29) _ (4) -methylsterane and carbon isotopic characteristics, are selected. The crude oil in this area is divided into four types, I. e., 鈪，

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