本文通过运用IES盆地模拟的方法,采用Easy%Ro模型,以单井的热史和生烃史为基础,从剖面和平面两方面研究了莱州湾凹陷两套主力烃源岩沙三段和沙四段在不同时期不同区域生烃状态。研究表明,在明化镇组下段沉积末期(5.1Ma)北洼沙三段烃源岩已广泛进入生烃门限,沙四段烃源岩大范围生排烃;现今北洼沙三段烃源岩大量排烃,沙四段烃源岩排烃范围进一步扩大,北洼中心处已进入生烃高峰。 Based on the thermal history and hydrocarbon generation history of single well by using the model of Easy% Ro and the simplified model of IES basin, this paper studied the effects of sand three-and-sand sections of two main source rocks in the Laizhou Bay Sag from two aspects of section and plane. Hydrocarbon generation status in different regions during the period. The results show that the source rocks of the third member of Beiwa Formation have entered the hydrocarbon generation threshold at the end of the sedimentary stage of the lower Minghuazhen Formation (5.1Ma), and the hydrocarbon source rocks of the fourth member of the Shahejie Formation have a wide range of hydrocarbon generation and expulsion. Nowadays, Large amount of hydrocarbon expulsion and the hydrocarbon expulsion range of the fourth member of Shahejie formation further widened, and the peak of hydrocarbon generation has been entered into at the center of Beiwa.