Nano-Scale Pore Structure and Fractal Dimension of Longmaxi Shale in the Upper Yangtze Region, South China: A Case Study of the Laifeng–Xianfeng Block Using HIM and N2 Adsorption
| العنوان: | Nano-Scale Pore Structure and Fractal Dimension of Longmaxi Shale in the Upper Yangtze Region, South China: A Case Study of the Laifeng–Xianfeng Block Using HIM and N2 Adsorption |
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| المؤلفون: | Yu Qi, Ying Sun, Liting Ju, Cheng Huang, Kun Yu, Yiwen Ju, Hongjian Zhu |
| المصدر: | Minerals, Vol 9, Iss 6, p 356 (2019) Minerals Volume 9 Issue 6 |
| بيانات النشر: | MDPI AG, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | fractal dimension, lcsh:QE351-399.2, pore structure, 0211 other engineering and technologies, Mineralogy, 02 engineering and technology, 010502 geochemistry & geophysics, 01 natural sciences, Fractal dimension, Adsorption, 021108 energy, helium ion microscope, Porosity, 0105 earth and related environmental sciences, Total organic carbon, chemistry.chemical_classification, lcsh:Mineralogy, Geology, Geotechnical Engineering and Engineering Geology, N2 adsorption, Hydrocarbon, chemistry, Volume (thermodynamics), Longmaxi Formation shale, Oil shale, Field ion microscope |
| الوصف: | This paper tries to determine the key evaluation parameters of shale reservoirs in the complex tectonic provinces outside the Sichuan Basin in South China, and also to target the sweet spots of shale reservoirs accurately. The pore-structure characteristics of the Lower Silurian Longmaxi shale gas reservoirs in Well LD1 of the Laifeng&ndash Xianfeng Block, Upper Yangtze region, were evaluated. N2 adsorption and helium ion microscope (HIM) were used to investigate the pore features including pore volume, pore surface area, and pore size distribution. The calculated results show good hydrocarbon storage capacity and development potential of the shale samples. Meanwhile, the reservoir space and migration pathways may be affected by the small pore size. As the main carrier of pores in shale, organic matter contributes significantly to the pore volume and surface area. Samples with higher total organic carbon (TOC) content generally have higher porosity. Based on the Frenkel&ndash Halsey&ndash Hill equation (FHH model), two different fractal dimensions, D1 and D2, were observed through the N2 adsorption experiment. By analyzing the data, we found that large pores usually have large values of fractal dimension, owing to their complex pore structure and rough surface. In addition, there exists a good positive correlation between fractal dimension and pore volume as well as pore surface area. The fractal dimension can be taken as a visual indicator that represents the degree of development of the pore structure in shale. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b05ee570fa2b8986f8d76ff47778a910Test https://www.mdpi.com/2075-163X/9/6/356Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b05ee570fa2b8986f8d76ff47778a910 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |