辽东湾古近系烃源岩生烃动力学研究  

Kinetic Study on Oil and Gas Generation from Paleogene Source Rocks in Liaodong Bay Area, Northern China

作　　者：牛成民 金强[2] 李培培 张如才 程付启[2] 吴奎 

机构地区：[1]中国海油天津分公司勘探开发研究院 [2]中国石油大学(华东)地球科学与技术学院

出　　处：《海相油气地质》2018年第1期91-96,共6页Marine Origin Petroleum Geology

基　　金：国家油气重大专项"渤海湾盆地深层油气地质与增储方向"(编号:2016ZX05006-007);中海油天津分公司项目"辽东湾探区烃源岩评价"共同资助

摘　　要：辽东湾海域勘探面积超过1.5×104 km2,200余口探井集中在构造高部位,洼陷部位烃源岩样品很少,这给油气资源评价带来很大困难。为了查明不同洼陷、不同层位、不同性质烃源岩的油气生成情况,进行了生烃动力学研究,得到了定量评价油气生成的效果。首先根据地球化学分析,选出不同类型的未成熟烃源岩样品,进行生烃热模拟实验,对实验数据进行了一级平行生烃反应的活化能计算,得到不同母质类型烃源岩活化能分布模型;再根据不同洼陷、不同层位烃源岩热演化历史和生烃动力学特征,计算了它们的油气生成率,再现了各个洼陷和层位烃源岩的油气生成过程。这为辽东湾烃源岩评价和油气资源预测提供了依据。It is very difficult to estimate hydrocarbon-generation potential comprehensively by geochemical analysis only using inadequate source rock samples, among which few distributed in sags and mostly on the structure highs in Liaodong Bay area（more than 15000 km2）. We studied the Paleogene samples in sags with kinetic simulations of hydrocarbon generation. According to the geochemical analysis, 4 samples of immature source rocks with different kerogen types such as Ⅰ,Ⅱ1,Ⅱ2 , and Ⅲ were selected, and a series of thermal simulations of hydrocarbon generation were conducted respectively.The activation energy distributions of different source rocks were calculated from the simulation results by parallel first- order kinetic modeling. Based on the burial history and subsurface thermal gradient at an estimated point, the activation energy values were applied in the calculation of hydrocarbon generation rates from real source rocks with correlative kerogen types, which can restore the hydrocarbon generation evolutions of different source rocks in different sags. This study provides valuable data for the oil and gas potential assessment in Liaodong Bay area.

关 键 词：烃源岩 生烃动力学 活化能 油气生成率 辽东湾探区 古近纪 

分 类 号：TE122.1[石油与天然气工程—油气勘探]