【摘要】 渤中坳陷是渤海湾盆地海域的重要组成部分 ,其东营组烃源岩远比周围陆域各坳陷发育。有机地化分析结果表明 ,渤中坳陷东营组下段烃源岩自上而下依次属中等、好和很好级别的烃源岩 ,尤其是东下段下部烃源岩 ,有机质十分富集、母质类型好、成熟条件具备。钻井揭示东下段泥岩最大厚度在坳陷西南部超过 70 0m ,在东南部超过 10 0 0m ;地震资料揭示东营组在坳陷中广泛分布 ,沉积巨厚。油气源对比研究表明 ,东下段烃源岩所生成的油气已聚集成藏 ,并具有一定的产能。东下段烃源岩是渤中坳陷重要的油源岩 ,也是重要的气源岩 ,具有良好的烃源前景。更多还原

【Abstract】 Bozhong depression is an important part of Bohai Bay basin, where much better source rocks developed in Dongying Formation than those in the surrounding onshore depressions. Organic geochemical analyses indicate that fair, good and excellent source rocks occur downwards in Lower Dongying Formation with its lower source rock being very rich in organic matter, good in kerogen type and sufficient for thermal maturity. The thickest mudstone in Lower Dongying Formation in wells is over 700 meters in the southwestern depression, and over 1000 meters in the southeastern depression. The seismic data also shows that Dongying Formation is widely spread and very thick in Bozhong depression. Based on oil_source correlation, it can be identified that oil generated from the source rocks in Lower Dongying Formation has accumulated in oil pools with some production capability. Therefore these source rocks are the most important oil and gas generator and have a good hydrocarbon source potential in Bozhong depression.更多还原