Detailed analyses of crude oils and source rock extracts indicate that there are two sets of effective hydrocarbon source rocks in eastern Pearl River Mouth Basin.
详细的原油和烃源岩抽提物分析表明，珠江口盆地东部地区存在两套有效的烃源岩。
Therefore, the presence of abundant 4-methyl steranes is a necessary but not sufficient indicator for the Wenchang Formation source in the eastern Pearl River Mouth Basin.
因此，4-甲基甾烷的存在不能作为判识珠江口盆地东部油源主要是文昌组的唯一证据。
The petroleum system of this area shows that Mesozoic of the eastern part of Pearl River Mouth basin may be an important prospect for oil and gas exploration.
因而可以预测珠江口盆地中生界海相是一个重要的油气勘探前景区。
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