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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）
Yangxia coal oil formation system is located in the eastern part of the Kuqa depression in the Tarim Basin. According to the carbon isotope characteristics, the Tiering and Iki Creek oil and gas fields in this system are all products of coal-bearing strata. However, their biomarker characteristics are significantly different: Tiergan coal-to-coal mudstone is very similar, according to Kirk Creek coal-oil formation is similar to coal. Based on the study of the geochemical characteristics of source rock and its crude oil in the Lower Jurassic coal measures in this system, for the first time, crude oil from coal-series mudstone is distinguished from crude oil derived from coal and rock. It is affirmed that both coal-bearing mudstone and coal rock have hydrocarbon generating ability. Certain types of coal and rock (hydrogen-rich and oxygen-depleted coal) can form commercial reservoirs. Figure 2 Table 1 Reference 2 (Liang Daxin Abstract)