摘要
本文发现在黄县褐煤中分布着高浓度的异海松烷和扁枝烷,作者认为成煤先质(可能是泪柏属)在经历了一定的成岩作用后造成了这种分布。随着模拟温度升高,二萜类浓度大量递减(尤其是在300℃温阶)。降海松烷的相对百分比随成熟度增加而降低。在整个热演化过程(低一中等成熟度)中,异海松烷和4β(H)—19—降异海松烷的百分比变化很小。研究结果表明,16a(H)—扁枝烷/16β(H)—扁枝烷与指标8a(H)—半日花烷/8β(H)—半日花烷具有良好的相关关系,他们均在石油的生成门限附近变化比较灵敏。文中还对二萜类化合物应用于生源分析和成熟度研究进行了初步探讨。
It is found that there is a high concentration of isopimarane and phyllocladane in Huangxian brown coal. It is possible that a certain diagenetic transformation precusor of coal(possibly dacrydium)causes such a distribution. In a lab experiment, as the temperature rises, the simulation concentration of diterpenoid hydrocarbons decrease greatly, especially at a level of 300°c and the relative percentages of norpimarane decreases with maturity. The percentages of isopimarane and 4β(H)-19-norisopimarane change vary little in the whole thermal evolution process(low-medium maturation). This study also shows that index of 16α(H)-phyllocladane/16β(H)-phyllocl adane has a good correlation with index of 8α(H)-labdane/8β(H)-labdane, the two indexs are all very sensitive in the neighbourhood of petroleum generation threshold. The application of diterpenoid hydrocarbon in the areas of material sources of hydrocarbons as well as their maturation have also been analysed herein.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1992年第3期27-35,共9页
Acta Petrolei Sinica
