So compaction is not the main mechanism of hydrocarbon expulsion of the Low Tertiary source rocks in the Dongying Depression.
因此，压实排烃不是东营凹陷下第三系烃源岩排烃的主要机制。
In the southern North China, the lower Paleozoic source rocks reached primary maturation at late Triassic and the secondary hydrocarbon generation did not occur at the Cenozoic.
南华北地区下古生界烃源岩在晚三叠世达到早成熟阶段，新生代基本未发生二次生烃作用。
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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