而源于前第三系碳酸盐岩的可能性较小。

There is less possibility that COi originated from pre-Tertiary carbonate rocks.

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南黄海盆地前第三系是中国近海潜在的油气勘探领域之一。

The Per-Tertiary in South Yellow Sea Basin is one of the potential petroleum exploration domains in the offshore of China.

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QHD3 0 1气藏的天然气属多源混合气，主气源为前第三系的煤成气。

The gas of QHD30 1 is mixed gas and mainly from the coal derived gas from pre Tertiary source rocks.

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