Abstract: The resource extent,distribution of layer system,burial depth and type of traps preliminarily prospected after 1995 in Jiyang Depression were discussed.The changes of the preliminary prospected traps in Dongying,Zhanhua,Chezhen and Huimin sags with the increase of prospecting degree were analyzed.The statistical result shows that the layer system,type and depth of prospected traps are unfairly well-distributed.The annual upgrade rate of different type trap has more differences.The traps in four sags have different changing rules.The explorations for the traps in deep and the Palaeogene system are gradually increasing,and the exploration for lithology trap is relatively ripe.It has a great development in burial hills,and the explorations for stratigraphic traps and others are in the primary stage.Although the investment to the preliminary prospecting of reserve traps is in the higher level at all times,the upgrade rates of newly found traps are gradually decreasing.The reserve volume of effective traps is not enough owing to the limitation of geologic knowledge,reservoir prediction and resolution of seismic data.According to the characteristics of non-structural petroleum exploration,the deep formation,paleogene system and non-structural traps have more potential for oil-gas exploration.The general trend of the trap exploration corresponds with the basic rule of spiral raise.

Key words: Jiyang Depression, trap drilling prospect, resource extent, upgrade rate, changing characteristics, exploration potential

摘要： 对济阳坳陷1995年以来预探圈闭的资源量、分布层系、埋藏深度和类型进行了研究,分析了东营、沾化、车镇、惠民4个凹陷预探圈闭随勘探程度提高的变化规律.结果表明,预探圈闭的层系、类型和埋藏深度的勘探分布不均衡,不同类型圈闭年度升级率差异较大,各凹陷预探圈闭呈现不同的变化规律.对深层和前第三系的圈闭勘探逐步增加,对岩性类圈闭勘探相对比较成熟,潜山类圈闭勘探已经有较大发展,地层等其他类圈闭勘探还属于初级阶段.尽管近年来对储备圈闭预探投入一直稳定在较高水平,但是由于受到地质认识、储层预测水平和地震资料分辨率等方面限制,新发现的圈闭升级率不断下滑,有效圈闭储备量明显不足.根据非构造油气藏勘探的特点,济阳坳陷深层、前第三系和非构造圈闭有较大的勘探潜力,通过理论和技术创新,仍然具有较大发展前景,圈闭勘探总的发展趋势符合螺旋式上升的基本规律.

关键词: 济阳坳陷, 圈闭钻探, 资源量, 升级率, 变化特征, 勘探潜力