东濮凹陷下第三系成藏动力学系统分析

为加强对油气勘探工作的指导，运用成藏动力学系统的理论和方法对东濮凹陷的油气成藏规律进行了研究，分析了形成东濮凹陷成藏动力学系统的构造沉积背景，将东濮凹陷划分为2个大的构造沉积旋回和5个演化阶段，在构造沉积研究的基础上，通过地层压力系统的研究结合油源及成藏动力学系统的封闭程度，将东濮凹陷下第三系划分为3个一级成藏动力学系统，下部自源－它源超高压半封闭系统，中部自源－它源高压半封闭系统，上部它源正常压力半封系统，并认为一级系统内部可以进一步划分出若干个次级子系统，分析了东濮凹陷成藏动力学系统的联络体系，认为东濮凹陷成藏动力学系统的联络体系主要是断层，不整合和岩性岩相变化带，指出了东濮凹陷成藏动力学系统的3种成藏模式及特征。

Analysis of Eogene Reservoir-forming Dynamic System in Dongpu Depression

The oil gas distribution pattern in Dongpu Depression is generalized by means of the theory and the method of the reservoir forming dynamic system. The authors studied structure and deposition setting which formed reservoir forming dynamic system in Dongpu Depression, and classified the depression into two large tectonic sedimentary cycles and five evolutional periods. Based on tectonic research and combined underground pressure, oil source and isolated condition, the authors identified three kinds of first class reservoir forming dynamic systems in Eogene, namely, lower self or else sourced overpressure semi enclosed system, middle self or else sourced high pressure semi enclosed system, upper else sourced normal pressure semi enclosed system, and suggested that each first class system includes many second class systems. The authors analyzed link systems of reservoir forming dynamic system in this area and suggested that the link systems consisted of fault, unconformity and transitional zone of lithology or lithofacies. This paper discussed reservoir forming features of each reservoir forming dynamic system and distinguished three kinds of reservoir forming models of reservoir forming dynamic system in Dongpu Depression.