摘要
苏北下第三系阜宁组的部分原油和生油岩的芳烃馏分中,通过色谱/质谱分析,检测到了一类新的生物标志物——脱羟基维生素E。这类化合物在样品中的分布,与正构烷烃OEP、类异戊二烯Ph/Pr和伽马蜡烷的分布,具有良好的正相关性,反映出这些生物标志物间可能的成因联系。脱羟基维生素E可以作为一种有效的沉积环境标志,指示强还原成水环境的沉积特征。在原油中,β-DeT/γ-DeT和α-DeT/γ-DeT的比值均小于1;而同样比值在生油岩中大于1,这可能是初次运移效应的反映。此外,这类标志物在低熟油的研究中可能具有一定的意义。
One kind of novel biomarkers, dehydroxytocopherol, has been detected and identifiedin the aromatic fraction of some source rocks as well as crude oils from the lower TertiaryFuning Formation, Jinhu Sag, Subei Basin. There is a good positive correlation betweendehydroxytocopherol and OEP, Ph/Pr or gammacerane, implying their similargeochemical Significances, especially on depositional environments. Dehydroxytocopherolcould been used as a useful paleaoenvironment biomarker which indicates a brackish tohypersaline deposition. The distribution of dehydroxytocopherol in crude oils and sourcerocks studied is quite similar. However, the β-/γ-and α-/γ-dehydroxytocopherol ratios are higher than 1 in crude oils, and lower than 1 in source rocks, which may show themigration effect of crude oils. In addition, this biomarker could play certain roles inoil-source correlation.
出处
《江汉石油学院学报》
CSCD
北大核心
1989年第3期11-18,共8页
Journal of Jianghan Petroleum Institute
关键词
维生素E
脱羟基
地球化学
dehydroxytocopherol
gammacerane
sedimentary environment
OEP(odd-even predominance)
