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利用储层流体包裹体分布特征、均一温度特征、组分特征和储层自生伊利石同位素年代测定,结合烃源岩的热演化史和生烃史,对博湖坳陷的油气成藏期次进行了综合分析,认为博湖坳陷主要发生了3期成藏事件:第1期发生在中晚侏罗世,是低熟油气和成熟油气的生成、运移和聚集的成藏过程;第2期发生在侏罗纪末期至白垩纪,是已聚集成藏的油气遭到破坏,重新调整,再次聚集的成藏过程;第3期发生在古近纪中晚期,是成熟油气或高成熟油气再次充注的成藏过程。第1期和第2期成藏是博湖坳陷的主要成藏事件,第3期成藏是博湖坳陷的次要成藏事件。
Based on the distribution characteristics of fluid inclusions, the homogenization temperature characteristics, the component characteristics and the dating of the volcanic isotopes in the reservoir, combining the thermal evolution history and hydrocarbon generation history of source rocks, the hydrocarbon accumulation stages in the Bohu Depression According to the comprehensive analysis, it is concluded that there are three major hydrocarbon accumulation events in the Bohu Depression: the first occurred in the middle and late Jurassic, which was the process of formation, migration and accumulation of low-mature oil and gas and mature oil and gas; the second Occurred in the end of the Jurassic to the Cretaceous, is the accumulation of hydrocarbon accumulation has been destroyed, readjustment, re-aggregation of the accumulation process; the third occurred in the late Paleogene, is mature or high mature oil and gas again Filling process of accumulation. The first stage and the second stage of accumulation are the major hydrocarbon accumulation events in the Bohu depression, and the third stage of accumulation is the secondary accumulation event in the Bohu depression.