东营凹陷输导体系构成特征

Constitution characteristics of the conducting system in Dongying Sag

输导体系是烃源岩与圈闭联系的物质体现,是衡量圈闭有效性的重要标准。本文结合东营凹陷的地质特征及层序地层格架,在盆地输导体系要素研究基础上,建立东营凹陷的输导体系格架,分析盆地输导体系的平面和剖面特征:平面上,油气以生油洼陷为中心向四周放射状运移,形成以生油洼陷为中心的复环带状分布的特点,油气藏的平面分布特征明显地受输导体系构成方式的控制(反演),输导体系平面分布特征又明显受到沉积体系展布与断裂分布的制约(正演);剖面上,东营凹陷在不同的构造时期输导体系存在差异性,在盆地的不同构造部位发育不同类型的输导体系。

Conducting system is a material embodiment in relationship between source rock and trap, and also an im- portant criterion for judging effectiveness of traps. Based on analysis of essential factors of conducting system, combined with geological characteristics and sequence stratigraphic framework, the framework of the conducting system was estab- lished in Dongying Sag, to analyze characteristics of the conducting system in the horizontal and vertical direction. In the horizontal direction, oil and gas centered on source sag and migrated radially to surrounding area, to form complex ring zon- al distribution characteristics focused on source sag. The planar characteristics of reservoir distribution are obviously con- trolled by conducting system structure （inversion）. And the planar distribution feature of conducting system is restricted by depositional system distribution and fracture distribution （forward）. In the vertical direction, there are differences in the conducting system at various tectonic periods and various types in different parts in Dongying Sag.