| 东营凹陷两套优质烃源岩层地质地球化学特征研究 |
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| 引用本文： | 朱光有,金强.东营凹陷两套优质烃源岩层地质地球化学特征研究[J].沉积学报,2003,21(3):506-512. |
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| 作者姓名： | 朱光有 金强 |
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| 作者单位： | 石油大学地球资源与信息学院 山东东营 257061 |
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| 基金项目： | 国家“十五”科技攻关项目 (编号 :2 0 0 1BA60 5A0 9) |
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| 摘 要： | 通过对东营凹陷烃源岩及原油的研究,发现东营凹陷主要油田的原油来自沙河街组沙三段下部 (Es3下)和沙四段上部 (Es4上)的烃源岩。作者利用大量的地质地球化学资料,深入分析了这两套优质烃源岩在沉积特征、地球化学特征等方面的差异性。其中沙三段下部烃源岩是在咸水-半咸水深湖-半深湖环境下沉积形成的,沙四段上部是在盐水-咸水浅湖-半深湖环境下形成的。同时还讨论了这两套优质烃源岩有机质的富集与保存特征,揭示了两套优质烃源岩的形成条件---高的古生产力和缺氧环境,其中咸水沉积环境是沙四段上部优质烃源岩形成的一个重要影响因素,藻类勃发控制了沙四段上部和沙三段下部高有机质丰度烃源岩的形成.
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| 关 键 词： | 优质烃源岩 东营凹陷 沙河街组 缺氧环境 古生产力 |
| 文章编号： | 1000-0550(2003)03-0506-07 |
| 收稿时间： | 2002-08-27 |
| 修稿时间： | 2002年8月27日 |
Geochemical Characteristics of Two Sets of Excellent Source Rocks in Dongying Depression |
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| ZHU Guang-you,JIN Qiang.Geochemical Characteristics of Two Sets of Excellent Source Rocks in Dongying Depression[J].Acta Sedimentologica Sinica,2003,21(3):506-512. |
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| Authors: | ZHU Guang-you JIN Qiang |
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| Institution: | College of Geo-Resource and Information,University of Petroleum,Dongying Shan dong 257061 |
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| Abstract: | The crude oil in Dongying depression mainly came from underlayer of Member 3 and upperlayer of Member 4 source rocks in the Shahejie Formation. On the basis of abundant geochemical data, the authors analyzed the discrepancies in sedimen ta ry and geochemical characteristics of the two sets of source rocks. The underlay er of Member 3 developed in deep lake-semideep lake with saline water-semisal ine water, but the upperlayer of Member 4 formed in shallow lake-semideep lake wi th brine water-saline water. Moreover, the authors discussed the accumulatio n and preservation features of organic matter and pointed out that high paleo-pro duct ivity and anoxic environment controlled the formation of the two sets of excelle nt source rocks. Brine condition has an important effect on upperlayer of Membe r 4 and algal blooms controlled the formation of source rocks with rich organic m atter in upperlayer of Member 4 and underlayer of member 3. |
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| Keywords: | excellent source rock Dongying depression Shahejie Formation anoxic environment paleo-productivity |
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