渤海湾盆地渤中坳陷东营组烃源岩的烃源前景
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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。
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.
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.
引文
1)黄正吉.渤海海域天然气成因类型及气源分析.1999
1)曹文贤,黄正吉等.我国近海最大油田———蓬莱193油田油气地球化学特征及烃源分析.第八届全国地化会议论文.2000
1)黄正吉,李友川.渤中凹陷油源分析及新探井烃源岩生烃潜力评价.1998
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3 辽河油田石油地质志编辑委员会.中国石油地质志(卷三).北京:石油工业出版社,1993,7:140～141
4 PetersKE ,MoldowanJM .生物标记化合指南.古代沉积物和石油分子化石的解释.姜乃煌等译.北京:石油工业出版社,1995:114～115
5 戴金星,李先奇等.中亚煤成气聚集域东部煤成气的地球化学特征.石油勘探与开发,1995,22(4):1～5
6 黄第藩,熊传斌等.鄂尔多斯盆地中部气田气源判识和天然气成因类型.天然气工业,1996,16(6):1～5
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8 陈建渝,何炳俊.辽东湾北部原油的类型及成因.见:第四届全国有机地球化学会议论文集.武汉:中国地质大学出版社,1990:89～103
1)曹文贤,黄正吉等.我国近海最大油田———蓬莱193油田油气地球化学特征及烃源分析.第八届全国地化会议论文.2000
1)黄正吉,李友川.渤中凹陷油源分析及新探井烃源岩生烃潜力评价.1998
1 胜利油田石油地质编写组.中国石油地质志(卷六).北京:石油工业出版社,1993,6:177～199
2 大港油田石油地质志编辑委员会.中国石油地质志(卷四).北京:石油工业出版社,1991,1:41～114
3 辽河油田石油地质志编辑委员会.中国石油地质志(卷三).北京:石油工业出版社,1993,7:140～141
4 PetersKE ,MoldowanJM .生物标记化合指南.古代沉积物和石油分子化石的解释.姜乃煌等译.北京:石油工业出版社,1995:114～115
5 戴金星,李先奇等.中亚煤成气聚集域东部煤成气的地球化学特征.石油勘探与开发,1995,22(4):1～5
6 黄第藩,熊传斌等.鄂尔多斯盆地中部气田气源判识和天然气成因类型.天然气工业,1996,16(6):1～5
7 戴金星,宋岩等.中国含油气盆地有机烷烃气碳同位素特征.石油学报,1993,14(2):23～31
8 陈建渝,何炳俊.辽东湾北部原油的类型及成因.见:第四届全国有机地球化学会议论文集.武汉:中国地质大学出版社,1990:89～103
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