• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of natural gas science and engineering >An investigation of the fractal characteristics of the Upper Ordovician Wufeng Formation shale using nitrogen adsorption analysis
【24h】

An investigation of the fractal characteristics of the Upper Ordovician Wufeng Formation shale using nitrogen adsorption analysis

机译：氮吸附法研究上奥陶统五峰组页岩的分形特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shales from the Upper Ordovician Wufeng Formation in the southwest of the Sichuan Basin of China were investigated in recent years because of its shale gas potential. In this work, eight shale samples were collected from the Wulong County of Chongqing City in the southwest of the Sichuan Basin of China. The samples' geochemistry and pore structure were studied using XRD (X-ray diffraction) analysis, TOC (total organic carbon) analysis and low-pressure N-2 adsorption analysis. Based on the low-pressure N-2 adsorption analysis, the fractal characteristics of the pore structure in the shales were investigated using the fractal FHH (Frenkel, Halsey, Hill) equation from N-2 adsorption data. The relationships between the specific surface area, the pore volume, the average pore size and the fractal dimension were discussed, and the relationships between the TOC, the mineralogical compositions and the fractal dimension were also discussed. The results indicate that the shales have high TOC contents, varying from 1.326% to 3.52%, and the major mineralogical compositions of the shales are quartz and clay minerals; the quartz contents are between 52.88% and 75.53%, and the clay minerals contents are between 12.74% and 34.58%. The specific surface area is between 7.68 m(2)/g and 24.76 m(2)/g, the total pore volume is between 0.04042 cm(3)/g and 0.07546 cm(3)/g and the average pore size is in the range of 11.01-21.05 nm. The fractal dimension D obtained by the expression 'D = 3 + K' provides a more realistic result than the fractal dimension D obtained by the expression 'D = 3 + 3K'. The fractal dimension D is between 2.4982 and 2.6359, indicating that the shales investigated have fractal characteristic. The fractal dimension exhibits positive correlations with the contents of TOC and clay minerals, whereas there is negative relationship between the fractal dimension and the quartz contents. The fractal dimension increases with increasing values of the specific surface area and the total pore volume and with decreasing value of the average pore size. The micropores in the WF shales have a stronger impact on the fractal dimension. (C) 2015 Elsevier B.V. All rights reserved.
机译：近年来，由于其页岩气的潜力，对中国四川盆地西南部上奥陶统五峰组的页岩进行了研究。在这项工作中，从中国四川盆地西南部的重庆市武隆县收集了八个页岩样品。使用XRD（X射线衍射）分析，TOC（总有机碳）分析和低压N-2吸附分析研究了样品的地球化学和孔结构。在低压N-2吸附分析的基础上，根据N-2吸附数据，使用分形FHH（Frenkel，Halsey，Hill）方程研究了页岩中孔隙结构的分形特征。讨论了比表面积，孔体积，平均孔径和分形维数之间的关系，并讨论了TOC，矿物组成和分形维数之间的关系。结果表明，该页岩的总有机碳含量较高，在1.326％至3.52％之间，页岩的主要矿物成分为石英和粘土矿物。石英含量在52.88％至75.53％之间，粘土矿物含量在12.74％至34.58％之间。比表面积在7.68 m（2）/ g和24.76 m（2）/ g之间，总孔体积在0.04042 cm（3）/ g和0.07546 cm（3）/ g之间，平均孔径在11.01-21.05 nm的范围。由表达式“ D = 3 + K”获得的分形维数D比由表达式“ D = 3 + 3K”获得的分形维数D更为真实。分形维数D在2.4982和2.6359之间，表明所研究的页岩具有分形特征。分形维数与TOC和粘土矿物的含量呈正相关，而分形维数与石英的含量呈负相关。分形维数随比表面积和总孔体积的值增加以及平均孔径的值减小而增加。 WF页岩中的微孔对分形维数的影响更大。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号