Analyses of the Macerals Contributing Mainly to Hydrocarbons Derived from Coals of the TurpairHami Basin
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摘要: 吐哈盆地中下侏罗统煤显微组分组成显示了“碎、小、薄”和过渡组分含量高的特点。结合显微和超微层次有机岩石学分析，在显微组分层次生烃组分主要为基质镜质体，碎屑类脂体、薄壁角质体、木栓质体和小孢子体在煤成烃中也有一定的贡献；超微层次生烃组分主要表现为分布于基质镜质体中的超微类脂体。煤中基质镜质体的高含量弥补了其单位生烃潜力低的不足，基质镜质体富氢成因在于生物化学阶段细菌等微生物对其强烈降解改造作用。Abstract: The Turpan-Hami basin is a typical basin in which hydrocarbons are derived from coalg and main source rocks are coalwith coaly organic matters in the Lower-Middle Jurassic.The analysis of organic petrology showed that the composition ofmaceraLs is of characteristic of the high content of groundmass maceraLs(such as desmocnllinite, macrinite),small individu-als of sporinite and alginite and higher contents of transition macerals(such as vitrinite inertinite desmoc;olHnite and bitu-minite).By mean of nucroscopy, laser microscopy and transmitting electronic microscopy(TEM),it was shown that themain oilg-generating maceraLs are desmocollinite under microscopic observation. Liptodetrinite,。utinite, suberinite and spori-nite have important contributions to thehydro carbon from coal; Under TEM the main oil generating mac}ral is the submi-croliptinite attered in desmoconite and macrinite and it is originated from degraded materials of bacteria. The high con-tent of desmoc collinite in coal remedies its lower hydrocarbon generation potential per unit The cause of hydrogen ric;hnessindesmoc;ollinite attributes to strong degradation and reworking of bacteria to it in the biocthemical stage.
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Key words:
- Turpan一ani basin /
- hydrocarbon derived from coal /
- maceral
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