| 河南东濮凹陷古近系沙河街组盐岩沉积特征及成因 |
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| 引用本文： | 胥菊珍,蒋飞虎,张孝义,尹哲.河南东濮凹陷古近系沙河街组盐岩沉积特征及成因[J].古地理学报,2003,5(2):162-170. |
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| 作者姓名： | 胥菊珍 蒋飞虎 张孝义 尹哲 |
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| 作者单位： | 1.中国地质大学能源地质系 北京100083 ;2.中原油田分公司勘探开发科学研究院 河南濮阳457001 |
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| 摘 要： | 东濮凹陷是渤海湾盆地的一个次级构造单元，其古近系的两个沉积旋回发育了四套盐岩，分别位于沙河街组第三段的第四亚段(S34)、第三亚段(S33)、第二亚段(S32)和沙河街组的第一段(S1)。主要分布在凹陷北部。每套盐岩又由若干个盐韵律组成，每一单韵律由盐岩和泥岩组成。两套等时对比标志层（深湖沉积）之间盐岩与砂泥岩存在着相变关系。盐岩是在深盆背景下干旱成因的，盐类物质来自地下深处上涌的卤水，分层卤水是盐形成的基本形式，上涌通道是基底大断裂，动力基础是岩浆活动。盐的阻隔作用使其对下部地层的温度、压力均有影响，这种影响有利于加快盐下地层中的有机质成熟与演化。盐又是良好的盖层，且在高温、高压下盐呈塑性状态。勘探实践看出东濮凹陷的岩性油气藏与盐岩的沉积有密切的关系，因此搞清盐岩的分布规律对东濮凹陷下步勘探有着极为重要的意义。
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| 关 键 词： | 河南 东濮凹陷 古近系 沙河街组 沉积旋回 盐岩 成因 沉积特征 |
| 文章编号： | 1671-1505(2003)02-0162-09 |
| 修稿时间： | 2002年9月11日 |
SEDIMENTATARY CHARACTERISTICS AND ORIGIN OF SALT ROCK OF SHAHEJIE FORMATION OF PALEOGENE IN DONGPU SAG,HENAN PROVINCE |
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| Xu Juzhen , Jiang Feihu , Zhang Xiaoyi Yin Zhe China University of Geosciences,Beijing Exploration and Development Science Institute of Zhongyuan Oil Field,SINOPEC,Puyang ,Henan.SEDIMENTATARY CHARACTERISTICS AND ORIGIN OF SALT ROCK OF SHAHEJIE FORMATION OF PALEOGENE IN DONGPU SAG,HENAN PROVINCE[J].Journal of Palaeogeography,2003,5(2):162-170. |
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| Authors: | Xu Juzhen Jiang Feihu Zhang Xiaoyi Yin Zhe China University of Geosciences Beijing Exploration and Development Science Institute of Zhongyuan Oil Field SINOPEC Puyang Henan |
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| Institution: | 1.China university of Geosciences, Beijing 100083;2.Exploration and Development Science Institute of Zhongyuan Oil Field ,SINOPEC, Puyang 457001,Henan |
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| Abstract: | The Dongpu Depression is a sub-tectonic unit of the Bohai Bay Basin. In the depression, four sets of salt rock developed in two depositional cycles of the Paleogene, which occurred respectively in the fourth submember(S34),third submember(S33) and second submember(S32) of member III(S3) of the Shahejie Formation, and member I of the Shahejie Formation (S1 ) . They are mainly distributed in the north part of the Dongpu Depression. In the center of the depression, salt rock is the thickest. Every set of salt contains many salt rhythms, and each rhythm is composed of salt bed and mud bed. Laterally, salts grade into mudstones and sandstondes. The salt is formed in deep basin in arid climate. The salt material is derived from the uprising brine from deep underground. Layered brine is the basic form for the formation of salt. The upwelling path of the brine is large basement faults. Magmatism provides the dynamic force. Because of insulation of the salt layers, the temperature and pressure beneath should be affected, and this will quicken the maturation and evolution of organic matter. Salt is excellent cap-rock, witch is plastic under high temperature and pressure. Previous exploration showed that the lithologic reservoir is closely related with salt deposition. So for further exploration, it is very important to understand the distribution laws of the salts in the Dongpu Depression. |
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| Keywords: | salt rock sedimentary characteristics depositional cycles Shahejie Formation origin Dongpu Sag |
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