We consider that the oil source bed in the east of Junggar Basin is mainly of the upper Permian series.
本文认为盆地东部地区的油源层主要是上二叠统。
But no organic reefs were developed in the Upper Permian and the Feixianguan Formation is lack of oolite.
但在海槽相区上二叠统不发育生物礁，飞仙关组缺乏鲕粒岩。
In the Eastern Sichuan Basin the study of hydrocarbon-generating history of the Upper Permian source rocks has not well done up to now.
现今川东上二叠统烃源岩生烃史研究具有局限性。
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