| 大港油田中部滩海新近纪古湖泊发育的证据 |
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| 引用本文： | 廖远涛,王华,卢宗盛,喻建新,曹飞.大港油田中部滩海新近纪古湖泊发育的证据[J].地球科学,2008,33(3):357-364. |
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| 作者姓名： | 廖远涛 王华 卢宗盛 喻建新 曹飞 |
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| 作者单位： | 中国地质大学资源学院 湖北武汉430074(廖远涛，王华，曹飞)，中国地质大学地球科学学院 湖北武汉430074(卢宗盛，喻建新) |
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| 基金项目： | 中国地质大学(武汉)校科研和教改项目
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湖北省杰出青年科学基金 |
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| 摘 要： | 大港中部滩海新近系层系是重要的油气后备勘探领域和战略接替区.前人普遍认为新近系层系发育曲流河和辫状河沉积.借鉴渤海海域浅层油气勘探经验,基于遗迹组构、微古生物、生物有机化合物、碳氧同位素以及地震等地质资料分析,认为中部滩海东部发育开阔的古湖泊,其证据为:发育见于国内外浅湖环境的典型的Palaeophycus遗迹组构;发现丰富的见于正常浅湖环境的浮游绿藻化石;发现较多的仅分布在古代和现代湖泊中的介形类——Candona、Cypris;干酪根类型、生物有机化合物、碳氧同位素以及地震等地质资料也证明了古湖泊的存在.馆陶组中、晚期至明化镇组沉积早期为湖泊逐渐扩张达到鼎盛发育的时期.
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| 关 键 词： | 古湖泊 遗迹组构 新近纪 滩海区 大港油田 |
| 文章编号： | 1000-2383(2008)03-0357-08 |
| 修稿时间： | 2008年1月24日 |
Evidence of Neogene Paleolake in the Central Beach Area of Dagang Oilfield |
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| LIAO Yuan-tao,WANG Hua,LU Zong-sheng,YU Jian-xin,CAO Fei.Evidence of Neogene Paleolake in the Central Beach Area of Dagang Oilfield[J].Earth Science-Journal of China University of Geosciences,2008,33(3):357-364. |
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| Authors: | LIAO Yuan-tao WANG Hua LU Zong-sheng YU Jian-xin CAO Fei |
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| Abstract: | The Neogene strata of central beach area in the Dagang Oilfield are important for reserve exploration and strategic substitution.The main depositional system of Neogene was regarded as meandering rivers and braided rivers.However,based on the analysis of ichnofabric,microfossils,organic compounds,oxygen and carbon isotope,seismic data,as well as the experiences of petroleum exploration in the shallow strata of Bohai Bay,lacustrine environment can be recognized in the east district of central beach,which is supported by the following evidence:typical Palaeophycus ichnofabric is found,which develops particularly in the shallow lake;abundant phytoplanktonic algae fossils are discovered,which live generally in the shallow lake.Moreover,as an indicator of ancient and modern lakes' existence,lots of ostracodas such as Candona and Cypris are discovered.The type of kerogen,organic compounds,oxygen and carbon isotope,and seismic data are also the existent evidences of lacustrine environment.The paleolake expanded till its maximum during the middle and late periods of Guantao Formation and the early period of Minghuazhen Formation. |
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| Keywords: | paleolake ichnofabric Neogene beach district Dagang oilfield |
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