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埕海断坡区是歧口凹陷滩海区重要的油气勘探区域,多年来受地表、地下复杂地质条件制约,勘探工作起步较晚,基础研究相对薄弱,油气富集规律尚欠缺系统的分析研究.以埕海断坡区古近系沙河街组、东营组为研究重点,对该区油源条件、生储盖组合及储层、圈闭等油气成藏因素的地质特征加以分析,进一步总结出基岩潜山背景,湖盆演化阶段,沉积微相展布是埕海断坡区油气富集的主控因素.
The Qionghai fault zone is an important oil and gas exploration area in the beach area of Qikou depression. It has been restricted by the complex geological conditions on the earth’s surface and underground for many years. The exploration work started relatively late, the basic research was relatively weak, and the laws of oil and gas enrichment lacked systematic analysis and research. Taking the Shahejie formation and the Dongying formation in the Paleogene of the Juheipo area in Panghai for example, this paper analyzes the geological characteristics of oil-gas accumulation factors such as reservoir conditions, reservoir-cap combination and reservoir and trap in the area, and further summarizes The background of bedrock buried hills, the evolution of lake basins and the deposition of microfacies are the main controlling factors of oil and gas accumulation in the Qionghai Slope Area.