煤系泥岩和煤岩生成原油的地球化学特征

阳霞煤成油系统位于塔里木盆地库车坳陷东部。据碳同位素特征判断，该系统中的提尔根油气田和依奇克里克油气田的原油都是煤系地层的产物。但它们的生物标志物特征有明显差异：提尔根煤成油与煤系泥岩十分相似，依奇克里克煤成油则与煤岩相似。根据对该系统中、下侏罗统煤系地层烃源岩及其原油地球化学特征的研究，首次将源于煤系泥岩的原油与源于煤岩的原油区别开来。肯定了煤系泥岩和煤岩都具有生烃能力，一定类型的煤岩（富氢贫氧煤）能够形成商业性油气藏。图２表１参２（梁大新摘）

Geochemistry of oils from coal and from the shale in coal measure strata.

In the article, the geochemical features of Jurassic source rock and it's crude in Yangxia sag in the eastern part of Kuqa depression is discussed. The oil derived from coal is distinguished, for the first time, from the oil derived from the shale in coal measure strata of Middle Lower Jurassic according to carbon isotopic correlation. But the biomarkers of shale in coal measures strata are very similar to the ones in Tiergen oil, and the biomarkers of coal are very similar to the ones in Yiqikelike oil. From the study we can see the coal with higher hydrogen and lower oxygen also has hydrocarbon generating potential as the shale in Jurassic strata. It is very important to hydrocarbon appraisal and the theory for coal generating hydrocarbon to judge the crude from the coal or from the shale.