| 涠西南凹陷流沙港组烃源岩生产力及发育模式 |
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| 引用本文： | 叶加仁,赵牛斌,杨宝林,徐建永.涠西南凹陷流沙港组烃源岩生产力及发育模式[J].地质科技通报,2020,39(1):105-113. |
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| 作者姓名： | 叶加仁 赵牛斌 杨宝林 徐建永 |
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| 作者单位： | 中国地质大学（武汉）构造与油气资源教育部重点实验室;中海油研究总院 |
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| 基金项目： | 国家科技重大专项2016ZX05024-002-003国家科技重大专项2017ZX05032-001-004 |
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| 摘 要： | 涠西南凹陷是中国近海北部湾盆地已证实的富烃凹陷,始新统流沙港组是该凹陷主要烃源岩层系.为深入认识涠西南凹陷流沙港组烃源岩的生产力和发育特征,采用有机地球化学与地球生物学相结合、定性分析与定量计算相结合的方法正演恢复了涠西南凹陷不同次洼流沙港组不同层段烃源岩的古生产力、有机质埋藏效率和有机碳埋藏生产力,进而建立了研究区流沙港组烃源岩形成的地球生物学模式.结果表明,涠西南凹陷流沙港组烃源岩的古生产力、有机质埋藏效率及有机碳埋藏生产力在横向不同次洼和纵向不同层段上均存在差异,横向上以B次洼最优,纵向上以流二段最高;涠西南凹陷流沙港组烃源岩发育超营养湖高埋藏效率高埋藏生产力、富营养湖中等埋藏效率中等埋藏生产力及富营养湖低埋藏效率低埋藏生产力3种代表性的地球生物学模式.
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| 关 键 词： | 古生产力 埋藏效率 埋藏生产力 地球生物学模式 涠西南凹陷 |
| 收稿时间： | 2019-11-14 |
Productivity and development model of source rock of the Liushagang Formation in the Weixinan Sag |
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| Ye Jiaren,Zhao Niubin,Yang Baolin,Xu Jianyong.Productivity and development model of source rock of the Liushagang Formation in the Weixinan Sag[J].Bulletin of Geological Science and Technology,2020,39(1):105-113. |
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| Authors: | Ye Jiaren Zhao Niubin Yang Baolin Xu Jianyong |
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| Institution: | (Key laboratory of Tectonic and Petroleum Resources of the Ministry of Education,China University of Geosciences(Wuhan),Wuhan 430078,China;CNOOC Research Institute,Beijing 100027,China) |
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| Abstract: | The Weixinan Sag is a proven hydrocarbon-rich sag with the Eocene Liushagang Formation as main source rock system in the Beibuwan Basin, offshore China.In order to deepen the understanding of the productivity and development characteristics of the Liushagang Formation source rock, the paleo-productivity, organic matter burial efficiency and organic carbon burial productivity of each sub-sag in the Weixinan Sag and each member in the Liushagang Formation are restored forward by using the methods of organic geochemistry combined with geobiology and qualitative analysis combined with quantitative calculation, and the geobiological development models of the Liushagang Formation source rock are further established.The results show that there are differences in paleo-productivity, organic matter burial efficiency and organic carbon burial productivity among different sub-sags in lateral and vertical directions.The B sub-sag is the best in plane and the E2L2 is the highest in vertical sequence.Three representative geobiological development models of the Liushagang Formation source rocks can be summarized as the hypertrophic lake with high burial efficiency and burial productivity, the eutrophic lake with medium burial efficiency and burial productivity, and the eutrophic lake with low burial efficiency and burial productivity. |
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| Keywords: | paleo productivity burial efficiency burial productivity geobiological model Weixinan Sag |
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