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用辽河拗陷低熟烃源岩开展无水热模拟实验、有水热模拟实验和抽出沥青热模拟实验, 结果表明脂肪酸随温度增高逐渐减少, 较高温度时有所增加, 减少的原因应与脂肪酸脱羧生烃有关, 其增加的现象则可能是干酪根新生脂肪酸和干酪根中的强干酪根脂肪酸解析下来转变为干酪根脂肪酸和沥青脂肪酸的结果. 抽出沥青热模拟实验中, 干酪根热解新生成的沥青含有脂肪酸, 表明干酪根中结合的脂肪酸受热可转移到沥青中. 低熟烃原岩沥青中, 主要以一元长链脂肪酸占优势, 干酪根相对含较多的二元脂肪酸, 它们均随热演化增高而由以高碳为主变为以低碳为主的分布, 根据模拟实验和低熟原油烷烃以长链为主, 推测脂肪酸对低熟油的贡献主要在低演化阶段(Ro < 0.6%). 实验还表明, 在有水参与下, 有利于新生脂肪酸和二元脂肪酸的生成, 并使脂肪酸脱羧生烃的速度相对变缓.
Hydrothermal simulation experiments were carried out on low-maturity source rocks in Liaohe depression. Hydrothermal experiments and asphaltene thermal simulations were carried out. The results showed that the fatty acids decreased with increasing temperature and increased at higher temperatures, Fatty acid decarboxylation of hydrocarbon generation, the increase of the phenomenon may be kerogen kerogen and kerogen in the strong kerogen converted into kerogen and bitumen fatty acid results.Putting asphalt thermal simulation experiment, kerogen pyrolysis The newly formed bitumen contains fatty acids, indicating that the bound fatty acids in kerogen can be transferred to the bitumen by heat, while in low maturized asphaltic bitumen, predominantly long chain fatty acids predominate and kerogens contain relatively more dibasic fatty acids According to the simulation experiment and the low-mature crude oil alkane with long chain, the contribution of fatty acids to low-mature oil is mainly at the stage of low evolution Ro <0.6%) .Experiments also showed that, with the participation of water, is conducive to the formation of new fatty acids and dibasic fatty acids, and the rate of fatty acid decarboxylation of the hydrocarbon phase Slow.