郭小文;何生;

• 1:中国地质大学研究生院
• 2:中国地质大学资源学院 武汉430074
• 3:武汉430074

摘要(Abstract)：

珠江口盆地番禺低隆起轻质原油的密度小于0.83 g/cm3,饱和烃质量分数高(71%~93%),不含沥青质等。从原油族组成、轻烃特征、碳同位素、生物标记化合物等方面综合分析了原油的地球化学特征。轻质原油的姥鲛烷/植烷峰面积比值高(6.1~7.4),碳同位素较重(-27.09‰~-26.48‰)、重排甾烷相对含量较高、重排甾烷/规则甾烷峰面积比值为0.65~0.95,C304-甲基甾烷相对含量较低,双环倍半萜烷相对含量较高,双环倍半萜烷/五环三萜烷峰面积比值为3.33~18.09。研究表明轻质原油的成熟度较高(镜质体反射率Ro>1.0%),原油母岩的沉积环境为弱氧化条件,母质以陆源高等植物输入为主,细菌和藻类也有少量贡献;运用轻烃参数,金刚烷化合物、生物标记化合物的相对含量和碳同位素值及系列指标进行的油油和油源对比研究表明,轻质原油具有相同母源和成因,油源可能主要为珠江口盆地白云凹陷渐新统恩平组煤系烃源岩。

关键词(KeyWords)： 珠江口盆地;轻质原油;油油对比;油源对比

Abstract:

Keywords:

基金项目(Foundation): 中国海洋石油有限公司项目“珠江口盆地番禺低隆起-白云凹陷北坡天然气成藏规律研究”

作者(Author): 郭小文;何生;

Email:

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