济阳坳陷盆缘地层目标勘探评价方法

Assessment Method for Exploration of Basin Peripheral Formation Target in Jiyang Depression

在对济阳坳陷盆缘地层油藏分布规律研究和成藏主控因素分析的基础上,采用定性分析和定量评价相结合的思路,建立了基于输导、保存、圈闭、储层等4项地质条件的成藏主控因素的分级评价方法。其中在输导体系条件突出了油源断层对盆缘地层目标成藏控制作用,在保存条件引入了对直接盖层厚度、顶底板条件的评价。同时结合常规勘探目标评价思路和内容,建立了济阳坳陷盆缘地层圈闭综合评价规范,该规范的建立对开展中国东部断陷盆地盆缘地层勘探目标的评价优选具有一定指导意义。

Based on the study of the distribution law of basin peripheral stratigraphic reservoirs in Jiyang Depression and the analysis of main accumulations-controlling factors and with adoption for the mindset for combination of qualitative analysis and quantitative assessment, the method for multi-level assessment of main accumulations-controlling factors was established on the basis of four geological conditions of conducting, storage, trap and reservoir. Of those, the condition of the conducting system highlighted the controlling effect of sourcing faults on accumulations of basin peripheral stratigraphic targets. Assessment of direct cap-rock thickness and top basement condition was introduced into the storage condition. Meanwhile, the standards for integrated assessment of the basin peripheral stratigraphic trap was established on the basis of conventional assessment of exploration targets. Establishment of these standards is of certain guiding significance to assessment and selection of basin peripheral stratigraphic exploration targets in the rift basins in China＇s eastern part.