天然气地球科学

• 天然气地质学 • 上一篇    下一篇

准噶尔盆地西北缘二叠系风城组白云岩化作用及其对储层影响

鲁新川,孙东,夏维民,吴志雄,殷建国,郭文铂   

  1. (1.甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,甘肃 兰州 730000;
    2.中国石油勘探开发研究院西北分院,甘肃 兰州 730000;
    3.中国石油青海油田勘探开发研究院,甘肃 敦煌 736202;
    4.中国科学院大学,北京 100049;5.成都理工大学地球科学学院,四川 成都 610059)
  • 收稿日期:2015-05-05 修回日期:2015-11-16 出版日期:2015-11-20 发布日期:2015-11-20
  • 通讯作者: 郭文铂(1976-),男,陕西佳县人,讲师,博士,主要从事构造地质学研究. E-mail:43780965@qq.com.
  • 作者简介:鲁新川(1979-),男,山东曹县人,助理研究员,博士,主要从事沉积学和石油地质学研究. E-mail:xclu@lzb.ac.cn.
  • 基金资助:

    2013年中国科学院油气资源研究重点实验室开放基金(编号:Y303KF1YJG);国家科技重大专项(编号:2011ZX05008-003-40);
    国家重点基础研究发展规划“973”项目(编号:2011CB201104);甘肃省重点实验室专项(编号:1309RTSA041)联合资助.

The Dolomitization of Permian Fengcheng Formation and Its Effect on Reservoir in Northwestern Junggar Basin

LU Xin-chuan,SUN Dong,XIA Wei-min,WU Zhi-xiong,YIN Jian-guo,GUO Wen-bo   

  1. (1.Key Laboratory of Petroleum Resources,Gansu Province/ Key Laboratory of Petroleum Resources Research,
    Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China;
    2.Research Institute of Petroleum Exploration and Development-Northwest,PetroChina,Lanzhou 730020,China;
    3.Research Institute of Exploration and Development,PetroChina Qinghai Oilfield Company,Dunhuang 736202,China;
    4.University of Chinese Academy of Sciences,Beijing 100049,China;
    5.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China)
  • Received:2015-05-05 Revised:2015-11-16 Online:2015-11-20 Published:2015-11-20

摘要:

运用岩心观察、薄片鉴定、测井资料分析、物性分析和地球化学分析方法,研究了准噶尔盆地西北缘二叠系风城组白云岩储层的岩石类型和白云岩化作用特征,讨论了白云岩化作用对储层的改造。认为准噶尔盆地西北缘二叠系风城组白云岩储层岩性复杂,有泥质、粉砂质和凝灰质白岩化岩类,发育白云岩化作用、去白云岩化作用和溶蚀作用;白云岩化作用和溶蚀作用对储层的改造具有积极的建设性作用,去白云岩化作用对储层物性具破坏作用;白云岩化地层物性明显优于相邻的非白云岩化地层的物性而成为相对的优质储层。通过白云岩化类储层和非白云岩化储层物性数据对比分析,认为白云岩化可使储层的孔隙度增加2%~8%。

关键词: 白云岩化, 储层, 风城组, 准噶尔盆地

Abstract:

By means of core observation,thin section identification,logging data,physical property and geochemical analysis,this paper investigated dolomite reservoir,which is located in Permian Fengcheng Formation at the northwestern margin of Junggar Basin,rock types and the characteristics of dolomitization,and discussed the rock transformation by dolomitization.The results showed the reservoir rocks are composed of argillaceous,silty and tuffaceous dolomite.There were dolomitization,dedolomitization and dissolution in the study area.Furthermore,it was considered that the dolomitization and dissolution played positive constructive roles in the transformations of the reservoirs.However,the dedolomitization hindered the increase of the reservoirs′ physical properties.Via the statistics of dolomitic and dedolomitic reservoir physical property,the research showed that the dolomitization was able to increase the reservoirs′ porosity by 2%-8%.

Key words: Dolomitization, Reservoir, Fengcheng Formation, Junggar Basin

中图分类号: 

  • TE122.2+3

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