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常规煤岩学分析方法的分辨能力限制了对具有亚显微及超显微结构的镜质组生油潜力的正确评价。对吐哈盆地保罗纪腐植煤富氢镜质体进行电子显微分析,检出3种超微类脂包体(超细纹层,超微渗出体,亚微粒体)和2种超微孔隙结构(贯穿孔结构,坍塌孔结构);发现在电子束持续辐照(6~20min)下,富氢镜质体的超皱纹层和基质都有滴状液态烃析出(前者多于后者),基质表面生成油膜区,分散的坍塌孔扩大而连片,孔壁堆积大量排烃后残余产物微粒体。实验结果为富氢镜质体的生烃热化学行为提供了直接证据,认为富氢镜质体具有生油潜力是因为含有大量超微类脂包体,且某些超微类脂物质与腐殖物质在生物地球化学凝胶化阶段融合后,在煤化阶段与镜质体同化。
The resolving power of conventional coal-rock analytical methods limits the correct assessment of the potential of vitrinite with sub-microscopic and ultra-microscopic structures. The electron microscopic analysis of the hydrogen-rich vitrinite in the Paleoji humus in the Turpan-Hami basin revealed that three kinds of ultramicroscopic liposomes (ultrafine layer, ultrafine exudate, sub-microsome) and two kinds of ultramicrostructure Pore structure (through-pore structure, collapsed pore structure). It was found that ultra-wrinkle layers and matrix of hydrogen-rich vitrinite have droplet-like liquid hydrocarbon precipitation under continuous irradiation of electron beam (6-20min) ). The oil film area was formed on the surface of the matrix, and the scattered collapsed holes were enlarged and contiguous. The large amount of residual product microsomes were accumulated in the pore walls. The experimental results provide direct evidence for the thermochemical behavior of hydrogen-rich vitrinite. It is concluded that the hydrogen-rich vitrinite has the potential of producing oil because it contains a large amount of ultramicro lipoid inclusions, and some ultra- Colony in the biogeochemical gelation phase fusion, in the coalification stage with the vitrinite assimilation.