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Comparison of low-field NMR and microfocus X-ray computed tomography in fractal characterization of pores in artificial cores

文献类型：期刊论文

作者Zhao, Yixin1,2,3; Zhu, Guangpei2,3; Dong, Yanhui4; Danesh, Nima Noraei5; Chen, Zhongwei5; Zhang, Tong2,3
刊名FUEL
出版日期2017-12-15
卷号210页码:217-226
关键词Artificial Core Pore Structure Nmr Micro-ct Digital Core Fractal Dimension
ISSN号0016-2361
DOI10.1016/j.fuel.2017.08.068
文献子类Article
英文摘要Studying the pore structure is very important for better understanding the characteristics of fluids storage and transport in rock reservoirs. To investigate the better way to characterize complex pore structures of rock reservoir, three artificial core samples with different permeabilities were investigated by Micro X-ray computed tomography (Micro-CT) and Nuclear Magnetic Resonance (NMR). A method for quantifying NMR pore structure is proposed based on the pore geometry derived from Micro-CT. The Pore Size/volume Distribution (PSD) from Micro-CT and NMR was compared. Moreover, some macroscopic physical properties of the cores were explained at the micro-scale based on the fractal analysis. Our results show that Micro-CT is a reliable and convenient way to interpret the NMR T-2 spectrum into real PSD for some brittle materials. The difference between 2D and 3D box-counting fractal dimensions of pores in artificial cores is less than one. The fractal dimensions of pores demonstrate a good negative correlation with the permeability. Moreover, the calculated fractal dimensions prove the existence of multiple fractal structure in artificial cores based on the NMR measurement. The fractal properties of PSD are mainly governed by the large pores in the tested cores. It was also found that the complexity of pore surface and fine pore structure has significant influence on heterogeneity. Finally, Micro-CT is proved to be ineffective in describing the fractal characteristics of a wide range of pore sizes due to limitation of resolution, which could be achieved by NMR more easily.
WOS关键词NUCLEAR-MAGNETIC-RESONANCE ; SIZE DISTRIBUTIONS ; SANDSTONE PORES ; POROUS-MEDIA ; IMAGES ; ROCKS ; COALS ; FRACTURES ; DIMENSION ; 2D
WOS研究方向Energy & Fuels ; Engineering
语种英语
WOS记录号WOS:000413759500024
出版者ELSEVIER SCI LTD
资助机构National Key Research and Development Program of China(2016YFC0801401 ; National Natural Science Foundation of China(51174213) ; Fundamental Research Funds for the Central Universities ; 2016YFC0600708) ; National Key Research and Development Program of China(2016YFC0801401 ; National Natural Science Foundation of China(51174213) ; Fundamental Research Funds for the Central Universities ; 2016YFC0600708) ; National Key Research and Development Program of China(2016YFC0801401 ; National Natural Science Foundation of China(51174213) ; Fundamental Research Funds for the Central Universities ; 2016YFC0600708) ; National Key Research and Development Program of China(2016YFC0801401 ; National Natural Science Foundation of China(51174213) ; Fundamental Research Funds for the Central Universities ; 2016YFC0600708)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62490]  
专题地质与地球物理研究所_中国科学院页岩气与地质工程重点实验室
通讯作者Zhao, Yixin
作者单位1.China Univ Min & Technol, State Key Lab Coal Resources & Safe Min, Beijing 100083, Peoples R China
2.China Univ Min & Technol, Coll Resources & Safety Engn, Beijing 100083, Peoples R China
3.China Univ Min & Technol, Beijing Key Lab Precise Min Intergrown Energy & R, Beijing 100083, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
5.Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia
推荐引用方式
GB/T 7714		 Zhao, Yixin,Zhu, Guangpei,Dong, Yanhui,et al. Comparison of low-field NMR and microfocus X-ray computed tomography in fractal characterization of pores in artificial cores[J]. FUEL,2017,210:217-226.
APA Zhao, Yixin,Zhu, Guangpei,Dong, Yanhui,Danesh, Nima Noraei,Chen, Zhongwei,&Zhang, Tong.(2017).Comparison of low-field NMR and microfocus X-ray computed tomography in fractal characterization of pores in artificial cores.FUEL,210,217-226.
MLA Zhao, Yixin,et al."Comparison of low-field NMR and microfocus X-ray computed tomography in fractal characterization of pores in artificial cores".FUEL 210(2017):217-226.

入库方式： OAI收割

来源：地质与地球物理研究所

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