东营凹陷西部发育太古界、古生界及中生界潜山。受郯庐断裂活动的影响 ,潜山在平面上呈带状分布 ,自东南向北西形成了NW向潜山构造带 ;自西南向北东形成了NE向潜山构造带。新生界的沙河街组、孔店组及中生界和古生界的石炭二叠系的烃源岩为潜山油气藏的主要油源。储集层由太古界变质岩和下古生界碳酸盐岩组成 ,平均孔隙度多在 1 4 ～ 5 0 之间。石炭 -二叠系、第三系及中生界下侏罗统构成潜山油气藏的 3套盖层。根据圈闭类型的差异 ,潜山油气藏分为潜山顶部及内幕两种类型。烃类潜山油气藏多分布于近源的断裂带附近 ,而非烃气往往沿深大断裂、火山通道向上运移 ,在适当的潜山圈闭中形成非烃潜山气藏 Archeozoic, Paleozoic and Mesozoic buried hill in western Dongying Depression. Influenced by the Tanlu fault activity, the buried hills are zonal distributed in the plane, forming NW buried hill structural belt from southeast to north west, and NE buried hill structural belt is formed from southwest to north east. The Cenozoic Shahejie Formation, Kongdian Formation, and Carboniferous Permian source rocks in Mesozoic and Paleozoic are the major oil sources of buried hill reservoirs. The reservoir consists of Archean metamorphic rocks and Lower Paleozoic carbonate rocks with an average porosity of mostly between 14 and 50. Carboniferous - Permian, Tertiary and Mesozoic Lower Jurassic buried hill reservoir composed of three sets of cap rocks. According to the difference of trap types, buried hill reservoirs are divided into two types: buried hill top and inside. Hydrocarbon buried hill reservoirs are distributed in the vicinity of fault zones near the source, whereas non-hydrocarbon gas often migrates along deep faults and volcanic channels to form non-hydrocarbon buried hill gas reservoirs in appropriate buried hill traps