• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
鄂尔多斯盆地南部煤系致密砂岩胶结作用对储层物性的影响
  • Title

    Effect of coal-measure tight sandstone cementation on reservoir physical property in the south of Ordos Basin

  • 作者

    久博黄文辉王雅婷陈晶吕晨航梁飞

  • Author

    JIU Bo1,2,3 ,HUANG Wenhui1,2,3 ,WANG Yating1,2,3 ,CHEN Jing1,2,3 ,LÜ Chenhang1,2,3 ,LIANG Fei1,2,3

  • 单位

    中国地质大学(北京)能源学院中国地质大学(北京)海相储层演化与油气富集机理教育部重点实验室中国地质大学(北京)非常规天然气地址评价及开发工程北京市重点实验室

  • Organization
    1. School of Energy Resources,China University of Geosciences(Beijing),Beijing  100083,China; 2. Key Laboratory for Marine Reservoir Evolution and Hy-drocarbon Abundance Mechanism,China University of Geosciences( Beijing),Beijing  100083,China; 3. Beijing Key Laboratory of Unconventional National Gas Geology Evaluation and Development Engineering,China University of Geosciences(Beijing),Beijing  100083,China
  • 摘要
    鄂尔多斯盆地南部上古生界盒8段致密砂岩储层成岩作用以压实作用与胶结作用为主,其中胶结作用作为最重要的成岩作用,势必会对储层渗透性造成影响。通过阴极发光薄片技术、扫描电镜以及薄片观察,对胶结物的类型及特征进行分析。结果显示,研究区内盒8段砂岩胶结作用可分为硅质胶结、钙质胶结与泥质胶结这三大类。此外,根据胶结物不同的赋存状态,将硅质胶结物可细分为Ⅰ型接触式硅质胶结、Ⅱ型次生加大边式硅质胶结、Ⅲ型镶嵌式硅质胶结;钙质胶结物可细分为Ⅰ型孔隙式钙质胶结、Ⅱ型点式交代型钙质胶结、Ⅲ型连晶式钙质胶结、Ⅳ型基底式钙质胶结;泥质胶结物可细分为Ⅰ型伊利石型泥质胶结、Ⅱ型黏土杂基型泥质胶结、Ⅲ型绿泥石薄膜型泥质胶结,Ⅳ型高岭石型泥质胶结。不同胶结物的赋存方式以及含量均不相同,结合Photoshop对不同胶结物进行定量化分析,结果表明点式钙质胶结对储层物性影响较小;硅质胶结物含量在低于5%时,有利于储层储集空间发育;连晶式钙质胶结不利于储层储集空间发育。
  • Abstract
    The tight sandstone reservoir diagenesis of the Upper Paleozoic He-8 member in the south of Ordos basin is mainly based on compaction and cementation. Cementation is the most important diagenesis in the target member. Therefore,it is bound to have an effect on the porosity and permeability of reservoir. Based on cathode luminesce,SEM analyses and casting slice,the types and characteristics of cements are analyzed. As a result,the tight sandstone ce- mentation of He-8 member is divided into three main types including silicate cementation,carbonate cementation and mud cementation. Besides,according to the occurrence status of different cements,silicate cement is divided into Type I (contact cement),Type II (overgrowth-edge cement),and Type III (mosaic cement);carbonate cement is divided into Type I (porous cement),Type II ( particle replacement cement),Type III ( crystal stock cement) and Type IV ( base cement);and mud cement is divided into Type I (illite mud cement),Type II (clay matrix mud cement),Type III (chlorite grain-coating mud cement),and Type IV (kaolinite mud cement). Different cementing methods and the content of cement are not the same. By means of the quantitative analysis with Photoshop,the result shows that the par- ticle replacement cement has little effect on the reservoirs physical property. The overgrowth-edge cement is positive to the reservoir storage space when the cement content is less than 5% . The crystal stock cement is negative to the reser- voir storage space.
  • 关键词

    胶结作用致密砂岩硅质胶结物钙质胶结物煤系气鄂尔多斯盆地

  • KeyWords

    cementation;tight sandstone;carbonate cement;silicate cement;coal-measures gas;Ordos Basin

  • 基金项目(Foundation)
    国家重点基础研究发展计划(973)资助项目(2014CB238900);国家自然科学基金资助项目(41472136);
  • DOI
  • Citation
    JIU Bo,HUANG Wenhui,WANG Yating,et al. Effect of coal-measure tight sandstone cementation on reservoir physical property in the south of Ordos Basin[ J]. Journal of China Coal Society,2018,43(9):2543 -2553.
  • 相关文章
相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联