中国含油气盆地形成机制及油气藏类型有很大的特殊性。

In China, the mechanism of oil and gas bearing basins and the type of oil and gas pools are unusual.

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而成盆期后改造又与中国含油气盆地的固有地质特征密切相关。

In turn, the post-reformation is closely related to the inherent geological features of the petroliferous basins of China.

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中国近海海域主要含油气盆地目前找到的原油，依成熟程度可分为未成熟、低成熟、成熟和高成熟原油四大类。

Crude oils found in the major Chinese offshore petroliferous basins can be classified into four categories based on their maturity, I.

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