东海盆地台北坳陷有机包裹体与油气生成

研究了有机包裹体及其均一温度的特征，分析了镜质组反射率（R。）与地质演化史的关系。结果认为：台北坳陷自第三纪以来有两次油气生成过程，第一次发生在E1末T4^0构造层形成之前，即古新世末，有机质成熟度处于未成熟－低成熟阶段，因此，这一期尽管有油气的生成，但运移规模有限，形成的有机包裹体极少。第二次发生在E2末T3^0构造层形成之前，即始新世末，此时区内主要烃源岩都已进入生烃高峰，是区内主要的油气生成、运移期。伴随油气的生成和运移，形成了大量以液相及气、液二相为主的有机包裹体。晚第三纪的沉积厚度近似于E2末剥蚀厚度，对油气生成和运移的影响不大。

Relationship Between Organic Inclusions and Hydrocarbon Generation in Taibei Depression in Donghai Basin

Characteristics of organic inclusions and their homogenization temperature were studied. The relationship between vitrinite reflectance ( R o) and history of geological evolution was analyzed. The result indicates that two times of oil and gas generation process has taken place in Taibei depression since Tertiary. The first time occurred in the end of E 1 (end of Paleocene), in which the scale of hydrocarbon generation and migration was small because of the immaturity of organic matter, and only a few organic inclusions were formed in this time. The second time occurred in the end of E 2 (end of Eocene), a period during which the main source rock generated hydrocarbon in its maximum amount. So, it was also the period of formation and migration of hydrocarbon, accompanied by the formation of a large number of organic inclusions. The sedimentary thickness of Neogene is similar to that of denudation in the end of E 2, which has only little influence on the formation and migration of oil and gas.