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三塘湖盆地低熟油的发现及其地球化学特征 总被引：4，自引：2，他引：4
三塘湖盆地目前所发现的原油的C29甾烷 20S/(20S +20R)值大部分小于 0.42,属于低 (未 )熟油的范畴。与国内外报道的低熟油相比,三塘湖盆地物性特征也具有高密度、高粘度及高含蜡量等特征,但其物性偏好。经油源分析,这些低熟油主要来源于上二叠统芦草沟组。该组烃源岩演化程度较低,有机质丰度较高,属较好生油岩。通过有机显微组分分析,发现芦草沟组烃源岩以富含腐泥无定形富氢显微组分而有别于三塘湖盆地其它低熟源岩。经热解分析,腐泥无定形是芦草沟组烃源岩主要生烃贡献者,并且其主生烃期Ro 在 0.35 %～ 0.6 %之间。因此,腐泥无定形低熟生烃是三塘湖盆地低熟油的主要生烃机制。另外,在三塘湖盆地原油以及芦草沟组源岩中都检测到 17α(H) 2 5 降霍烷系列化合物,说明三塘湖盆地的低熟油可能与陆源有机质细菌降解改造作用有关。 相似文献
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腐泥煤变质系列热解色谱和氯仿沥青“A”的特点 总被引：2，自引：0，他引：2
对滕县、淄博两煤田与腐殖煤共生的不同煤级的腐泥煤进行了热解和氯仿沥青“Ａ”的族组份分析,获得如下认识：热解的结果,Ｔｍａｘ、Ｓ１、Ｓ３、Ｉｐ全部高于共生腐殖煤,Ｉｔ全部低于共生腐殖煤,Ｓ２和Ｃｐ在低煤化阶段高于腐殖煤,而中,高煤化阶段则低于腐殖煤;氯仿沥青“Ａ”都随煤级的增高而减少,腐泥煤全部高于腐殖煤,腐泥煤从低煤级到高煤级其族组份的排序从饱和烃＞非烃＞芳烃＞沥青质变化到非烃＞芳烃＞沥青质＞饱和烃;而腐殖煤族组份的排序则从沥青质＞芳烃＞非烃＞饱和烃＞沥青质。 相似文献
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腐泥煤的煤化作用研究 总被引：3，自引：1，他引：2
腐泥煤的煤化作用特征目前了解甚少.对我国产出的不同时代、不同煤化程度腐泥煤,结合热模拟试验,并通过与腐殖煤的对比,较系统地研究了在煤化作用过程中,腐泥煤的宏观和微观岩石学特征、元素组成和化学结构的演变规律。在此基础上,探讨了腐泥煤的煤化作用机理,研究了其煤化程度指标,提出了其煤级划分方案。 相似文献
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Petrographic and megascopic criteria have traditionally been used as the basis for the classification of torbanite and cannel coal. For this study, it was hypothesized that modern analytical organic geochemical and multivariate statistical techniques could provide an alternative approach. Towards this end, the demineralized residues of 14 torbanite (rich in Botryococcus-related alginite) and cannel (essentially, rich in organic groundmass and/or sporinite) coal samples were analyzed by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). Cluster analysis performed on the Py-GC/MS data clearly distinguished the torbanite from the cannel coal, demonstrating a consistency between the chemical properties and the petrographic composition. All the torbanite samples group into one cluster, their pyrolyzates having an overwhelming predominance of straight chain hydrocarbons, a characteristic typical of Botryococcus. The presence of the C9–C26 n-α,ω-alkadiene series is the key feature distinguishing the torbanites from the other samples. The cannel coals exhibit more chemical diversity, reflecting their greater variability in petrographic composition. The Breckinridge cannel, dominated by a highly aliphatic lamalginitic groundmass, chemically fits the torbanite category. The bituminitic groundmass-dominated cannel coals fall into a cannel sub-cluster, their pyrolyzates having a characteristic predominance of n-alk-1-enes and n-alkanes (particularly the long-chain homologues), with no detectable alkadienes. The vitrinitic groundmass-dominated Ohio Linton cannel and the sporinite-rich Canadian Melville Island cannel are readily distinguishable from the other cannels by the relatively abundant aromatic and phenolic compounds in their pyrolyzates. The internal distribution patterns of alkylaromatic and alkylphenolic isomers are shown to be less significant in the classification of this sample set. Multivariate statistical analysis of the pyrolysis data not only successfully discriminated torbanites from cannel coals, but recognized subtler differences between the examples of these two coal types, in substantial agreement with the petrographic characterization. As such, these methods can substitute for or supplement the traditional microscope-based approach. 相似文献
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运用电感耦合等离子质谱（ICP-MS）、冷蒸汽原子吸收光谱（CV-AAS）、显微镜光度计和煤化学等方法,对江苏徐州大屯矿区张双楼12-1号钻孔腐泥煤（太原组17号煤层）和龙固煤矿腐植煤（太原组21号煤层）的煤岩煤质和微量元素特征进行研究。结果显示,徐州大屯矿区腐泥煤中藻类体含量很高,是典型的藻煤,其挥发份产率和氢含量是腐植煤的1.5倍;腐泥煤的Sr/Ba为1.43,腐植煤为0.48,揭示该腐泥煤是在比较开阔的海水中形成的;腐泥煤和腐植煤中的不相容元素在原始地幔标准化曲线上具有一致的Pb显著富集、Ti显著亏损的分布特征,其稀土元素丰度球粒陨石标准化曲线形态相似,均显示轻稀土富集、重稀土相对亏损的特征;腐泥煤中Ce和Eu元素未发生价态变化,腐植煤中Eu显示负异常。 相似文献
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腐泥煤变质系列的核磁共振谱和顺磁共振谱特征 总被引：3，自引：0，他引：3
利用核磁共振和顺磁共振谱对等变质系列的腐泥煤和腐殖煤进行了对比研究,两种谱图清楚地表现出两个变质系列各煤阶的峰形和峰值都有明显的区别。 相似文献
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