东营凹陷沙河街组页岩微观孔隙多重分形特征
作者:
作者单位:

作者简介:

王民(1981—),男,河北石家庄人,教授,博导,从事常规和非常规油气地球化学研究。联系电话:(0532)86983190,E-mail:wangm@upc.edu.cn。

通讯作者:

基金项目:

国家科技重大专项“济阳坳陷页岩油勘探开发目标评价”(2017ZX05049-004),国家自然科学基金项目“致密砂岩微-纳米孔喉体系中油赋存特征和可动性研究”(41672116),中央高校基本科研业务费专项资金“致密油赋存特征及可动性研究”(17CX05012)。


Multi-fractal characteristics of micro-pores of Shahejie Formation shale in Dongying Sag
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    孔体积、孔径分布和比表面积的非均质性刻画是页岩油勘探评价中的一项重要工作。采用多重分形理论,对东营凹陷沙河街组页岩低温氮气吸附实验数据进行研究,探讨页岩孔隙多重分形特征、分形参数与孔隙参数和页岩矿物组成之间的关系。结果表明:东营凹陷沙河街组页岩孔径分布存在明显的多重分形特征,孔径分布的非均质性主要与孔隙比表面积有关;Hurst指数越大,渗透率越大。除多重分形谱的右半偏参数和左右半偏参数之差与其他分形参数相关性较差外,多重分形参数之间表现出很强的相关性,信息维数、关联维数均与Hurst指数呈正相关关系,而与Hausdorff维数、左半偏参数和多重分形谱峰宽等其他参数均呈负相关关系;信息维数、关联维数和Hurst指数等多重分形参数均与比表面积、孔体积呈正相关关系,除右半偏参数外,其他多重分形参数与比表面积、孔体积呈负相关关系;多重分形参数与页岩矿物组成无明显相关性。

    Abstract:

    Characterizing the heterogeneity of pore volume,pore size distribution,and specific surface area is an important task in the evaluation of shale oil exploration. In this study,the multifractal theory was adopted to study the experimental data of low temperature N2 adsorption of Shahejie Formation shale in Dongying Sag. Relationships among multifractal characteristics,fractal parameters,pore parameters and shale mineral composition were discussed. Results show that:the pore size distribution of Shahejie Formation shale in Dongying Sag is characterized by multiple fractal features,and the heterogeneity of the pore size distribution is mainly related to the specific surface area of the pore. The larger the Hurst index indicates the greater penetration rate. There are strong positive or negative correlations among the multifractal parameters except the difference between the right semi-biased parameter and the left semi-biased parameter of multifractal spectrum.Information dimension and correlation dimension are positively related to Hurst index and negatively to Hausdorff dimension,left semi-biased parameter and multifractal spectral peak width,while multi-fractal parameters,such as information dimension and correlation dimension,are positively correlated with the specific surface area and pore volume,and the other multifractal parameters are negatively correlated with the specific surface area and pore volume(except for the right semibias parameter). There is no obvious correlation between multi-fractal parameters and rock mineral composition.

    参考文献
    相似文献
    引证文献
引用本文

王民,焦晨雪,李传明,李政,周能武,李进步,卢双舫,田福春,郝桂宪,石瑾.东营凹陷沙河街组页岩微观孔隙多重分形特征[J].油气地质与采收率,2019,26(1):72~79

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2019-04-02