| 辽河坳陷滩海月东油田新近系馆陶组底界研究 |
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| 引用本文： | 崔向东,王仁厚,石敦久,袁清秋,马宏斌.辽河坳陷滩海月东油田新近系馆陶组底界研究[J].地质科学,2007,42(3):455-468. |
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| 作者姓名： | 崔向东 王仁厚 石敦久 袁清秋 马宏斌 |
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| 作者单位： | 1. 南京大学地球科学系, 南京, 210093;2. 中国石油天然气股份有限公司辽河油田公司勘探开发研究院, 辽宁盘锦, 124010 |
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| 摘 要： | 辽河坳陷南部滩海地区馆陶组底界的确定长期以来缺乏划分的依据,因靠近南部中央低凸起及其两侧的馆陶组巨厚块状砂砾岩层与下伏东营组之间发育一套厚50～100m不等的砂砾岩与砂泥岩的正粒序沉积,其时代归属有不同意见。本文首次在这套有争议的地层的岩心中发现了属新近纪的孢粉化石组合以及属于古近纪沙河街组和东营组中-下部的藻类再沉积化石,为本套地层归属新近纪馆陶组提供了可靠的生物化石对比依据。渤海湾盆地的新近系与下伏古近系间普遍为角度不整合接触,因风化侵蚀面起伏不平而馆陶组与下伏东营组的岩性变化可分为突变型、渐变型和“三明治”型3种。正确认识馆陶组底界对合理划分和对比油气层组有重要的勘探意义。
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| 关 键 词： | 新近系馆陶组 化石组合 不整合面 月东油田 辽河坳陷 |
| 文章编号： | 0563-5020（2007）03-455-14 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006-04-102006-06-01 |
BASAL BEDS OF THE NEOGENE GUANTAO FORMATION IN YUEDONG OILFIELD, BEACH AREA OF THE LIAOHE DEPRESSION |
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| Cui Xiangdong,Wang Renhou,Shi Dunjiu,Yuan Qingqiu,Ma Hongbin.BASAL BEDS OF THE NEOGENE GUANTAO FORMATION IN YUEDONG OILFIELD, BEACH AREA OF THE LIAOHE DEPRESSION[J].Chinese Journal of Geology,2007,42(3):455-468. |
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| Authors: | Cui Xiangdong Wang Renhou Shi Dunjiu Yuan Qingqiu Ma Hongbin |
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| Institution: | 1. Department of Earth Sciences, Nanjing University, Nanjing 210093;2. Exploration & Development Research Institute of Liaohe Oilfield Branch Company, China National Petroleum Corp., Panjin, Liaoning 124010 |
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| Abstract: | Three kinds of contact between the Neogene Guantao Formation and the Paleogene Dong-ying Formation could be recognized in the Liaohe Depression:the eruptive,gradual and “sandwiched” types.The latter was discovered in southern part of the Central Rise and its both sides,where the lower sandstone-conglomerate and upper siltstone-mudstone,with thickness being about 50～100 m,sandwiched in between the typical Guantao Formation and the Dongying Formation.Since lack of evidence,there was different opinions on age of the strata for a long time.The authors found in the argumentative strata from the Well Yuedong 603,for the first time,the sporopollen fossil assemblage in age of Neogene as well as redeposited alga fossils from the Paleogene Shahejie Formation and middle-lower Dongying Formation,which was obviously different from that in the underlying Donying Formation.The discovery confirmed that the argumentative strata should be basal beds of the Neogene Guantao Formation.Furthermore,the features of the unconformity between the Paleogene and the Neogene and the exploration implications of the strata were discussed. |
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| Keywords: | The Neogene Guantao Formation Fossil assemblage Unconformity The Yuedong Oilfield The Liaohe Depression |
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