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铁岭灰岩模拟产物的残留烃中,甾萜烷的含量很高,伽马蜡烷含量较高,三环萜烷和四环萜烷含量较低,几乎不含脱甲基藿烷系列。残余晶包有机质仍保持着模拟实验前晶包有机质的甾萜烷分布特征,即三环萜烷和四环萜烷含量较高,脱甲基藿烷系列高于正常藿烷,甾烷仍保持着降解前原貌。残留烃、残余晶包有机质和原岩晶包有机质的甾萜烷特征对比表明,实验过程中残留烃的甾萜烷是由干酪根和晶包有机质共同产生的,但以干酪根为主。同时也说明,干酪根热降解形成的甾萜烷没有加入到残余的晶包有机质中去,晶包有机质保持着独特的热演化进程。压力影响甾烷的异构化程度,高压下的C29ααα甾烷20S/(20R+20S)和ββ/(αα+ββ)比值较低压同温度下的低,压力对萜烷异构体参数影响不明显。
Among the residual hydrocarbons in the simulation products of Tieling limestone, the content of the steroidal alkanes is high, the content of gamma-alkanes is relatively high, the content of tricyclic terpinene and tetracyclic terpane is relatively low, and there is almost no demethylohophane series. The residual crystalline organic matter still retains the distribution characteristics of the organic matter of the former crystalline organic matter before the simulation experiment, that is, the content of tricyclic terpinene and tetracyclic terpenoid is higher than that of normal hopane in the demethyl-hopane series and the sterane remains Before the degradation of the original appearance. The comparison of residual hydrocarbon, residual crystalline organic matter and original crystalline inclusion of steroidal terpanes showed that the residual hydrocarbon of steroidal alkanes was co-produced by kerogen and crystalline organic matter, but was mainly kerogen. At the same time, it also shows that the sterol-terpane formed by the thermal degradation of kerogen is not added to the residual crystalline organic matter, and the crystalline organic matter maintains a unique thermal evolution process. The effect of pressure on the degree of isomerization of steranes was not obvious at lower pressures and pressures at lower pressures and pressures of C29ααα sterane 20S / (20R + 20S) and ββ / (αα + ββ) under high pressure .