The stratum of main source rock among the Marine facies is the upper Sinian and the Paleozoic group.
其中海相地层中的主力烃源岩层为上震旦统和上古生界石炭—二叠系。
The first spreading cycle resulted in the formation of Wenchang mudstone, Eocene, which is the important and main source rock of the basin.
第一扩张旋回中形成的始新统文昌组泥岩是珠江口盆地的主要烃源岩。
The result shows that dark mudstone of lower Es4 is the main source rock and the gas reservoir belongs to source and reservoir in the same bed.
研究结果表明，沙四段下亚段盐间发育的暗色泥岩为主要烃源岩，属于“自生自储”型气藏。
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