天然气地球科学

• 天然气地质学 • 上一篇    下一篇

渤海湾盆地东营凹陷古近系细粒沉积岩岩相类型及判别

张超1,2,张立强1,2,陈家乐1,2,罗红梅3,刘书会3   

  1. 1.中国石油大学(华东)地球科学与技术学院,山东 青岛 266580;
    2.海洋国家实验室 海洋矿产资源评价与探测技术功能实验室,山东 青岛 266071;
    3.中国石化胜利油田分公司地质科学研究院,山东 东营 257015
  • 收稿日期:2016-12-06 修回日期:2017-03-07 出版日期:2017-05-10 发布日期:2017-05-10
  • 通讯作者: 张立强(1970-),男,山东曲阜人,教授,博士生导师,主要从事储层地质学研究. E-mail:liqiangzhangwxm@163.com.
  • 作者简介:张超(1992-),男,山东济南人,硕士研究生,主要从事细粒沉积岩方面研究. E-mail:578569785@qq.com.
  • 基金资助:

    国家科技重大专项“深层油气、非常规天然气成藏规律与有利勘探区评价技术”(编号:2017ZX05008-004);国家科技重大专项“东濮凹陷油气富集规律与增储领域”(编号:2016ZX05006-004)联合资助.

Lithofacies types and discrimination of Paleogene fine-grainedsedimentary rocks in the Dongying Sag,Bohai Bay Basin,China

Zhang Chao1,2,Zhang Li-qiang1,2,Chen Jia-le1,2,Luo Hong-mei3,Liu Shu-hui3   

  1. 1.School of Geosciences in China University of Petroleum(East China),Qingdao 266580,China;
    2.Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China;
    3.Geological Science Research Institute,SINOPEC Shengli Oilfield Company,Dongying 257015,China
  • Received:2016-12-06 Revised:2017-03-07 Online:2017-05-10 Published:2017-05-10

摘要:

东营凹陷古近系沙河街组沙三下—沙四上亚段是细粒沉积岩发育的主力层段,岩相类型多样。通过岩心观察、薄片、X-射线衍射分析,对东营凹陷古近系细粒沉积岩进行岩相类型划分;选取GR、CNL,AC等测井曲线建立岩相测井识别模式;应用判别分析对不同类型细粒沉积岩进行区分。结果表明:古近系沙河街组沙三下—沙四上亚段细粒沉积岩碳酸盐矿物含量高,共发育灰岩类、泥岩类、粉砂岩类、混合细粒沉积岩类四大岩相类型,根据矿物成分、构造以及有机质含量差异可进一步划分为含有机质块状灰岩、富有机质纹层状粉砂质泥岩、富有机质层状泥质粉砂岩、富有机质层状泥质灰岩等亚类;各岩相具有不同的岩相识别模式;利用判别分析,可有效区分不同类型细粒沉积岩。该方法为缺少取心资料井段的细粒沉积岩的岩相识别、预测以及细粒沉积岩储层的评价和可改造性研究提供一定的基础。

关键词: 细粒沉积岩, 岩相划分, 测井识别模式, 判别分析, 沙河街组, 东营凹陷

Abstract:

The Paleogene lower Es3-upper Es4 in Dongying Sag are the main layers which developed fine-grained sedimentary rocks and the lithofacies typesare diverse.Through core observation,thin section and X-ray diffraction analysis,the Paleogene sedimentary rocks in Dongying Sag are divided into several lithofacies types;The identification modes of lithofacies are established based on the GR,CNL and so on;Discriminant analysis is used to distinguish different types of fine grained sedimentary rocks.The results show that:(1)The fine-grained sedimentary rocks of lower Es3-upper Es4 have high content of carbonate minerals,which totally develop four types of lithofacies,such as limestone,mudstone,silty sandstone and mixed fine-grained sedimentary rockswhich can be further divided into several sub categories,such as massive limestone containing organic matter,laminatedsilty mudstoneenriched in organic matter,layered muddy siltstone enriched in organic matterand so on;(2)Each lithofacies has different mode of lithofacies identification;(3)Using discriminant analysis,the different types of fine-grained sedimentary rocks can be distinguished effectively.This method provides a basis for lithofacies identification and prediction of fine-grained sedimentary rocks lacking coring data as well as evaluation and reformablity of fine-grained sedimentary reservoirs.

Key words: Fine-grained sedimentary rocks, Lithofacies division, Logging identification mode, Discriminant analysis, Shahejie Formation, Dongying Sag

中图分类号: 

  • TE122
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