| 济阳坳陷渤南洼陷古近系沙河街组沉积相 |
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| 引用本文： | 康仁华,刘魁元,赵翠霞,金平信,彭德堂,罗顺社,李维锋,高振中.济阳坳陷渤南洼陷古近系沙河街组沉积相[J].古地理学报,2002,4(4):19-29. |
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| 作者姓名： | 康仁华 刘魁元 赵翠霞 金平信 彭德堂 罗顺社 李维锋 高振中 |
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| 作者单位： | 1.胜利油田公司河口采油厂 山东东营257200;2.江汉石油学院 湖北荆州 434023 |
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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的沙河街组。沙河街期各时段沉积相的展布各具特征，并具清晰的演化序列。沙四早期以发育扇三角洲相为特征，分布于洼陷南部；北部边缘则发育近岸水下扇沉积；东部及西部均存在辫状河三角洲相；中部有盐湖沉积。沙四晚期以盐湖相发育为特征，主要占据湖泊深水部位，其周围依次分布半深湖、浅湖及滨湖亚相。此外，局部见及小型辫状河三角洲沉积。沙三期是辫状河三角洲发育的全盛时期，主要分布于洼陷东南部，物源来自孤岛凸起。这些沉积长期来被认为是浊积岩，近期研究表明它们属辫状河三角洲沉积。辫状河三角洲前缘砂体构成了渤南洼陷最主要的储层成因类型，渤南洼陷绝大部分油气均储存在该类砂体中。沙三期湖泊相沉积也始终发育，且深湖、半深湖亚相发育良好。经过沙三期后的抬升剥蚀和填平补齐作用，沙二期湖盆变浅，以浅湖为主，研究区东南部及西北部均发育面积较大的辫状河三角洲沉积。沙一期发生大规模湖侵，物源区向后退缩，研究区仅存在单一的湖泊相，其中半深湖、深湖亚相占绝对优势。
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| 关 键 词： | 沉积相 古近系 沙河街组 渤南洼陷 济阳坳陷 |
| 文章编号： | 1671-1505(2002)04-0019-11 |
| 修稿时间： | 2002年3月11日 |
SEDIMENTARY FACIES OF THE SHAHEJIE FORMATION OF PALEOGENE IN BONAN SAG OF JIYANG DEPRESSION |
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| Kang Renhua Liu Kuiyuan Zhao Cuixia Jin Pingxin Peng Detang Luo Shunshe Li Weifeng Gao Zhenzhong Hekou Production Plant of Shengli Oil Field Corporation,Dongying ,Shandong Geoscience.SEDIMENTARY FACIES OF THE SHAHEJIE FORMATION OF PALEOGENE IN BONAN SAG OF JIYANG DEPRESSION[J].Journal of Palaeogeography,2002,4(4):19-29. |
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| Authors: | Kang Renhua Liu Kuiyuan Zhao Cuixia Jin Pingxin Peng Detang Luo Shunshe Li Weifeng Gao Zhenzhong Hekou Production Plant of Shengli Oil Field Corporation Dongying Shandong Geoscience |
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| Institution: | 1.Hekou Production Plant of Shengli Oil Field Corporation, Dongying 257200, Shandong;2.Geoscience Department of Jianghan Petroleum Institute, Jingzhou 434023, Hubei |
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| Abstract: | The Paleogene Shahejie Formation is the main petroliferous stratum in the Bonan Sag of Jiyang Depression in Bohai Gulf Basin.The features of the distribution of sedimentary facies of every member of the Shahejie Formation are various and the evolution of sedimentary facies is clear. During the early period of the fourth subage of the Shahejie Age, it is characterized by well-developed fan delta facies, which located in the south part of the Bonan Sag. Inshore-submerged fan was developed in the north margin, braided delta facies was lain in the east and west, and deposits of salty lacustrine were located in the center. During the late period of the fourth subage, it is characterized by well-developed salty lacustrine facies, which located in the deep-water area of the Bonan Sag. Semi deep-lake subfacies, shallow lake subfacies and lakeshore subfacies were developed respectively around the salty lacustrine facies. Moreover, there were some small-scale braided deltas locally. The third subage of the Shahejie Age was the period of full bloom of braided deltas. During this period, braided deltas were located in the southeast part of Bonan Sag. The main source area was Gudao Salient. Sandstone bodies of braided delta front are the most principal reservoir in which almost oil of Bonan Sag was preserved. The lacustrine facies was also developed throughout the third subage, especially the deep-lake subfacies and semi deep-lake subfacies were well developed. Through the uplift, erosion and sedimentation during the post third subage, the lacustrine basin of the second subage shallowed and mainly composed of shallow lake subfacies. Braided deltas with an extensive area were developed in the southeastern and northwestern of the study area. During the first subage, source area retreated with a large scale transgression of the lake. There only was lacustrine facies developed in the study area, in which the deep lake subfacies and semi deep lake subfacies were over prevailed. |
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| Keywords: | sedimentary facies evolution of sedimentation Paleogene Shahejie Formation Bonan Sag |
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