济阳坳陷石炭系—二叠系烃源岩的生烃演化

Hydrocarbon-generation evolution of Permian-Carboniferous source rock in Jiyang Depression

济阳坳陷石炭系——二叠系煤系烃源岩在多期构造运动的影响下发生过多次生烃演化。对石炭系——二叠系煤系烃源岩在不同地质时期生烃过程的动态分析表明，研究区石炭系——二叠系有机质具有阶段性成熟演化特征和多次生烃过程，其中燕山期和喜山期是济阳坳陷石炭系——二叠系煤系烃源岩最重要的生烃期。利用镜质体反射率对济阳坳陷次级凹陷的石炭系——二叠系烃源岩的再次生烃门限进行了划分，确定了再次生烃门限深度约为3900-4500m。按照不同地区的石炭系——二叠系煤系烃源岩的生烃一埋藏历史，将其生烃演化过程分为4种类型，并指出了济阳坳陷石炭系——二叠系煤系烃源岩再次生烃的有利地区。

The Permian-Carboniferous coal-bearing source rocks in Jiyang Depression experienced the complicated tectonic-burial history. The multiple hydrocarbon-generation evolution took place in this area. The dynamic analysis on the hydrocarbon-generation process in different geological times revealed that the maturity of the Permian-Carboniferous coal-bearing source rocks in Jiyang Depression evolved stage by stage, and there existed many times of hydrocarbon-generation. The important hydrocarbon-generation processes of Permian-Carboniferous coal-bearing source rock in Jiyang Depression took place in the Yanshanian and Himalayan periods. The hydrocarbon-regeneration threshold depth of the Permian-Carboniferous coal-bearing source rock in Jiyang Depression compartmentalized by virinite reflectance is about from 3900 meters to 4500 meters. According to the hydrocarbon-generation and burial history of the Permian-Carboniferous coal-bearing source rocks in different area, the hydrocarbon-generation process was classified into four types. The available zone for hydrogen-regeneration of the Permian-Carboniferous coal-bearing source rock in Jiyang Depression was presented.