中文摘要：

在烃源岩生烃史模拟、烃源岩和原油地球化学特征精细剖析和对比的基础上，对渤海湾盆地南堡凹陷油气成藏关键时刻主力烃源岩生烃演化及油气来源进行了研究。结果表明：在东营末期（距今24．6Ma），位于洼陷中心的滩海地区沙三段底部烃源岩处于大量生油阶段。在明化镇末期（距今2Ma），位于洼陷中心的滩海地区沙三段底部烃源岩处于生凝析气一干气阶段，沙一段底部烃源岩处于大量生油一生凝析油阶段，滩海地区东三段和拾场洼陷沙三段底部烃源岩处于大量生油阶段。原油划分为5类，其中高柳构造带沙河街组原油（I类）来自拾场洼陷沙三段烃源岩；高柳构造带浅层、庙北背斜构造带原油（Ⅱ类）来自滩海地区沙一段和东三段烃源岩；庙南斜坡构造带、南堡2号和5号构造带浅层原油（Ⅲ类）来自滩海地区沙三段、沙一段和东三段烃源岩；南堡1号构造带浅层原油（Ⅳ类）来自滩海地区沙三段和沙一段烃源岩；滩海地区奥陶系和沙河街组原油（V类）主要来自滩海地区沙三段烃源岩，油气来源与油源断层切割烃源岩层系有关。

英文摘要：

Hydrocarbon-generation evolution of source rock at key hydrocarbon accumulation moments and oilgas source in Nanpu Depression of Bohai Bay Basin were studied by using techniques of basin modeling and dehcate geochemical analysis and correlation of source rock and crude oil. The results showed that near the center of Sag, in late Dongying Formation （24.6 Ma before present） source rock of bottom Sha3 Member in beach area was in the peak. In the phase of late Minghuazhen Formation （2 Ma before present） , near the center of Sag, source rock of bottom Sha3 Member in beach area was in the condensate gas to dry gas stage, source rock of bottom Shal Member in beach area was in the peak to condensate oil stage, source rock of bottom Dong3 Member in beach area and Sha3 Member in Shichang Sag was in the peak. The crude oil was divided into 5 types. The crude oil of Shahejie Formation in Gaoliu tectonic belt （ Type I ） was come from source rock of Sha3 Member in Shichang Sag ; The crude oil of shallow Gaoliu tectonic belt and Miaobei anticline belt （Type II ） was come from source rock of Dong3 and Shal Member in beach area ; The crude oil of Miaonan slope belt, shallow tectonic beh of Number 2 and 5 （ Type m ） was come from source rock of Dong3, Shal, and Sha3 Member in beach area ; The crude oil of shallow tectonic belt of Number 1 （ Type IV ） was come from source rock of Shal and Sha3 Member in beach area ; The crude oil of Ordo-vician and Shahejie Formation in beach area（Type V ） was mainly come from source rock of Sha3 Member in beach area. Oil-gas source was controlled by source faults cutting formation where source rocks were matured.