含油气系统流体迁移数值模拟及在辽河陆西凹陷的应用

Modeling of Fluid Migration in Petroleum System and its Application in Luxi Depression

流体迁移和运动的模拟是含油气系统定量研究与分析的核心内容 .在生储盖圈闭等基本成藏要素分析的基础上 ,根据地下深部烃类流体生成、运移的基本物理化学规律 ,文章提出了描述含油气系统流体迁移和运动特征的数学模型 ,介绍了相应的定量模拟软件PSM(PetroleumSystemModeling)的结构和功能 .结合开鲁盆地陆西凹陷的实例 ,利用PSM对凹陷的J3jf1 J3jf(! ) 含油气系统在不同时期的生排烃、运移聚集过程等进行了模拟 .研究认为 ,J3jf1 J3jf(! ) 的关键时刻为阜新期末(J3fx) ,烃源岩的大量生烃、油气的运聚及圈闭演化等成藏作用相互配合 ,有利于油气的运移与聚集 .实例应用表明 ,含油气系统定量模拟不仅为地质家提供了一套更好地理解、评价含油气系统的工具 ,同时结合其他研究方法可以更好预测有利勘探目标 .

It is known that modeling of fluid migration is the key problem of petroleum system's numerical simulation and hydrocarbon resources assessments. Based on the analysis of petroleum geological features and primary fluid flow theories, including heat flow and hydrocarbon generation and migration ones,This paper firstly discussed the the basic formulas of quantitative modeling of fluid migration, and then introduced the modules and functions of PSM (Petroleum System Modeling) software system. As a case study, a petroleum systems in Luxi Depression, the J 3jf1-J 3jf(!) is described and assessed by the PSM system. Study showed that the key period of J 3jf1-J 3jf(!) is late J 3fx,in which main oil-pooling processes matches well, in favor of oil pooling. Practice of research indicates that the numerical simulation of fluid migration of the petroleum system is an effective quantitative way to study and assess the petroleum system.