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

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