| 摘要: |
| 通过钻井资料分析、岩心观察、地球化学研究等技术手段,结合该区古构造、古气候、古盐度等资料，对东营凹陷古 近系音盐岩的垂向序列、平面分布、物质来源、形成环境、挖制因素及其与油气藏的关系进行了探讨。结果表明，东营凹 陷孔店组一段至沙河街组四段发育有4套厚层膏盐岩,在剖面上具有泥岩碳酸盐岩"石音岩类-盐岩类的蒸发序列，在 平面上,整个凹陷都有分布。其盐源主要是陆源,由周围凸起的寒武、奥陶系提供。随着盐湖的演化，膏盐岩形成环境 由初期的“浅水蒸发”到后期的“深水蒸发”。膏盐岩沉积主要受控于气候条件、物源供给等因素。由于膏盐岩的封隔 作用,孔店组及沙四段形成了两个独立的含油气系统,这为东营凹陷深层油气勘探指明了方向。 |
| 关键词: 东营凹陷 古近系 膏盐岩 成因模式 含油气系统 |
| DOI： |
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| 基金项目:“十五”国家科技攻关项目(2003BA613A-02);教育部新世纪优秀人才支持计划(NCET-06 - 0604) |
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| Genetic model of salt-gypsum rock of Paleogene in Dongying depression and its relationship with hydrocarbon reservoir |
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XU Lei1,CAO Ying-chang1,WANG Yan-zhong1,HUANG Long2
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(1. Faculty of Geo-Resource and Information in China University of Petroleum, Dongying 257061, Shandong Province, China ;2. School of Resource and Information Technology in China University of Petroleum，Beijing 102249, Chirm)
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| Abstract: |
| The vertical sequence，plane distribution，material source，formation environment，control genesis of the salt-gypsum rock in Dongying depression and its relationship with hydrocarbon reservoir were studied by means of drilling data analysis, cores observation, geochemical research as well as the analysis of palaeostructure, palaeoclimate and palaeosalinity of the area. The results show that four thick bedded salt-gypsum rocks developed in member 1 of Kongdian formation and member 4 of Shahejie formation in Dongying depression. In the vertical direction, mudstone-halite-gymsum-carbonatite are deposited successively upward. And the plane distribution is so comprehensive that salt-gypsum rock can be found all over the depression. The salts are continental source and come from the Cambrian and Ordovician systems of the surrounding uplifts. Along with the evolution of palaeoIake,the depositional environment of salt-gypsum rock varies from " shallow water evaporate" to ” deep water evaporate". The deposition of the salt-gypsum rock is mainly controlled by palaeoclimate and provenance. As a result of the mothballing of the salt-gypsum rock，two independent hydrocarbon-bearing systems developed in the Kongdian formation and member 4 of Shahejie formation^ |
| Key words: Dongying depression Paleogene salt-gypsum rock genetic model hydrocaiiwn-bearing system |
