| 渤海湾盆地渤南洼陷古近系沙河街组三段沉积相的GIS辨析 |
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| 引用本文： | 佟彦明,韩飞,何幼斌,彭德堂.渤海湾盆地渤南洼陷古近系沙河街组三段沉积相的GIS辨析[J].古地理学报,2008,10(2):215-220. |
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| 作者姓名： | 佟彦明 韩飞 何幼斌 彭德堂 |
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| 作者单位： | 1.斯伦贝谢（中国）DCS 北京100004;2.长江大学地球科学学院 湖北荆州434023;3.中海石油基地集团有限责任公司通讯网络分公司 广东深圳518067 |
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| 摘 要： | 渤海湾盆地济阳坳陷渤南洼陷的主要含油层系为古近系沙河街组三段，目前关于该段沉积相类型的认识分歧很大。应用地理信息系统ArcView GIS 3.2 a的空间分析功能，求取了沙三段各砂层组的沉积表面坡度。9砂层组沉积时的坡度多为1.5°～3.5°，紧邻孤岛凸起处坡度可达3.5°～5°；而5砂层组沉积时的坡度则几乎全部小于1.8°。综合考虑5砂层组、9砂层组的代表性和盆地沉积构造背景、储集层砂体外围泥岩的沉积特征、纵向上的沉积组合关系、储集层砂体平面展布形态及其自身的沉积学特征，认为渤南洼陷沙三段主要的储集层砂体应为辫状河三角洲沉积，仅最下部9砂层组的储集层砂体为深水湖泊重力流沉积。
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| 关 键 词： | 渤海湾盆地 渤南洼陷 古近系 沙三段 地理信息系统 坡度分析 沉积相 |
| 文章编号： | 1671-1505(2008)02-0215-06 |
| 修稿时间： | 2007年8月12日 |
Analysis based on GIS of sedimentary facies of the Member 3 of Paleogene Shahejie Formation in Bonan Sag,Bohai Bay Basin |
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| Tong Yanming,Han Fei,He Youbin,Peng Detang.Analysis based on GIS of sedimentary facies of the Member 3 of Paleogene Shahejie Formation in Bonan Sag,Bohai Bay Basin[J].Journal of Palaeogeography,2008,10(2):215-220. |
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| Authors: | Tong Yanming Han Fei He Youbin Peng Detang |
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| Institution: | 1.Schlumberger(China)DCS，Beijing100004;2.Faculty of Geosciences，Yangtze University，Jingzhou434023，Hubei;3.Communication & IT Company, CNOOC Oil Base Group, Shenzhen518067，Guangdong |
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| Abstract: | The Member 3 of Paleogene Shahejie Formation is the main petroliferous interval in the Bonan Sag of Jiyang Depression in Bohai Bay BasinCurrently the viewpoints about the sedimentary facies types are quite different. The sedimentary gradients of each sandy interval of the Member 3 of Shahejie Formation were calculated by applying the spatial analysis module of geographic information system ArcView GIS 3.2 aThe sedimentary gradient of the 9th sandy interval is mainly between 1.5°～3.5° and the gradient where it is adjacent to the Gudao Uplift can reach 3.5°～5°，while the sedimentary gradient of the 5th sandy interval is generally less than 1.8°According to the representative features of these two sandy intervals，the depositional and tectonic setting of the basin，the sedimentary characteristics of the mudstones surrounding the reservoir sandbodies，the vertical sedimentary assemblages，the planar distribution of the reservoir sandbodies and their own sedimentary characteristics，it is concluded that the main reservoir sandbodies of the Member 3 of Shahejie Formation in the Bonan Sag is dominated by braided fluvial deltaic deposits and only the 9th sandy interval at the basal part of the Member 3 is of deep water turbidite origin. |
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| Keywords: | Bohai Bay Basin Bonan Sag Paleogene the Member 3 of Shahejie Formation GIS gradient analysis sedimentary facies |
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