石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (2): 219-229.doi: 10.11743/ogg20170202

• 油气地质 • 上一篇    下一篇

渤海湾盆地渤南洼陷沙三下亚段泥页岩非均质性特征及演化模式——以罗69井为例

彭丽1,2, 陆永潮1,2, 彭鹏3, 刘惠民4, 刘占红1,2, 杜学斌1,2, 李吉君5, 张三盛6   

  1. 1. 中国地质大学(武汉) 构造与油气资源教育部重点实验室, 湖北 武汉 430074;
    2. 中国地质大学(武汉) 海洋学院, 湖北 武汉 430074;
    3. 中海石油(中国)有限公司 天津分公司 渤海石油研究院, 天津 300452;
    4. 中国石化 胜利油田分公司 地质科学研究院, 山东 东营 257015;
    5. 中国石油大学(华东) 非常规油气与新能源研究院, 山东 青岛 266580;
    6. 中国石油 国际投资(加拿大)公司, Calgary T2P 3H9
  • 收稿日期:2015-12-03 修回日期:2016-07-22 出版日期:2017-04-28 发布日期:2017-05-04
  • 作者简介:彭丽(1986-),女,博士研究生,层序地层学和沉积地球化学。E-mail:474545488@qq.com。
  • 基金资助:
    国家重点基础研究发展计划(973计划)项目(2014CB239102)。

Heterogeneity and evolution model of the Lower Shahejie Member 3 mud-shale in the Bonan Subsag,Bohai Bay Basin:An example from Well Luo 69

Peng Li1,2, Lu Yongchao1,2, Peng Peng3, Liu Huimin4, Liu Zhanhong1,2, Du Xuebin1,2, Li Jijun5, Zhang Sansheng6   

  1. 1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China;
    2. College of Marine Science and Technology, China University of Geosciences, Wuhan, Hubei 430074, China;
    3. Bohai Petroleum Institute, Tianjin Branch, CNOOC, Tianjin 300452, China;
    4. Exploration and Development Institut, Shengli Oilfield Company, SINOPEC, Dongying, Shandong 257015, China;;
    5. Research Institute of Unconventional Oil & gas and Renewable Energy, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
    6. PetroChina International Investment Corporation(Canada), Calgary, Alberta, T2P 3H9, Canada
  • Received:2015-12-03 Revised:2016-07-22 Online:2017-04-28 Published:2017-05-04

摘要: 通过岩心观察和样品测试数据综合分析,在总结前人层序格架研究成果的基础上,对渤海湾盆地济阳坳陷渤南洼陷古近系沙河街组三段下亚段湖相泥页岩的多重非均质性特征和演化规律进行研究。结果表明:沙三下亚段为一个三级层序,层序内可识别出湖扩体系域(EST)、早期高位体系域(EHST)和晚期高位体系域(LHST)。岩相组合、矿物组成、藻类化石、有机碳含量和有机质类型都在沙三下亚段层序格架内发生明显的规律性变化。其中,岩相组合方面共识别出6种岩相类型,各岩相的矿物组成从EST到LHST,粘土矿物、石英和长石含量增加,方解石和白云石含量减少,黄铁矿含量在EHST最高。藻类化石在LHST种类及丰度最为发育,有机碳含量在EST最低,有机质类型以Ⅰ型和Ⅱ1型为主。沙三下亚段泥页岩含油性受多重非均质性特征综合影响,对比分析认为EHST含油性最好,同时也是最具潜力的页岩油目的层段。

关键词: 非均质性, 演化模式, 泥页岩, 沙河街组三段下亚段, 渤南洼陷, 渤海湾盆地

Abstract: Multiple heterogeneity characteristics and evolutionary process of the Lower member 3 of Paleogene Shahejie Formation lacustrine shale in the Bonan Subsag,Jiyang Depression have been analyzed based on previous sequence stratigraphic framework and analysis of core observation and sample testing.The results show that the Lower Es3(下) can be described as a third-order sequence,which can be divided into expanding systems tract (EST),early highstand systems tract(EHST) and late highstand systems tract (LHST).Lithofacies associations,mineralogy,algae species occurrence,as well as TOC (total organic carbon) and kerogen type,change noticeably and regularly in the Lower Es3 shale within the sequence stratigraphic framework.For lithofacies associations,six lithofacies are identified.From the EST to the LHST,there are increased abundance in clay minerals,quartz and feldspar,and reduced abundance in calcite and dolomite,while pyrite reached the highest abundance in EHST.Algaes have the largest number and most variety of species in the LHST.TOC content is the lowest in the EST.Kerogen type is dominated by type Ⅰ and Ⅱ1.The oil richness is influenced by multiple heterogeneity characteristics,comparative analysis suggests the EHST is the most potential shale oil target interval in the study area with excellent oil richness.

Key words: heterogeneity, evolution model, mud shale, the Lower 3rd member of the Shahejie Formation, Bonan Subsag, Bohai Bay Basin

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