低场核磁共振技术在煤炭岩相孔隙结构中的应用

doi:10.11889/j.0253-3219.2017.hjs.40.120501

Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (12): 120501-120501.doi: 10.11889/j.0253-3219.2017.hjs.40.120501

• NUCLEAR PHYSICS, INTERDISCIPLINARY RESEARCH • Previous Articles Next Articles

Application of low-field nuclear magnetic resonance technology in coal petrographic pore structure

Rahila·Abduwahit, MA Fengyun, ZHANG Xiang, LIU Jingmei, ZHONG Mei, ZHAO Xin

Key Laboratory of Coal Clean Conversion & Chemical Engineering Process of Xinjiang Uygur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China

Received:2017-04-21 Revised:2017-06-05 Online:2017-12-10 Published:2017-12-08
Supported by:
Supported by National Natural Science Foundation of China-Xinjiang Joint Fund (No.U1503293), Xinjiang University Scientific Research Project (No.XJEDU2016S025)

Abstract

Abstract: Background: Low-field nuclear magnetic resonance technology, with the advantages of a rapid detection process and no damage to sample, has been widely used in the field of oil exploration, food preservation, building materials. Purpose: The aim of this work is to study the pore structure of the coal samples in different areas and the saturation of the fluid in the pores, which reflects the difference in the lithofacies structure and the distribution of the fluid in the pores. Methods: The porosity, permeability, and fluid saturation of the coal samples before and after saturation of water and manganese were measured by low-field nuclear magnetic resonance. Results and Conclusion: Results show that before saturation the proton relaxation signal of coal samples is dominated by irreducible water, and after saturation the signal of free water in all coal samples appear, and the signal of irreducible water of the coal samples in Yiwu county, Baishi lake and Dongha district are stronger than that before saturation. The saturation of free fluid of samples in Kazakhstan is the highest and that of irreducible water is the lowest. The oil saturation of samples in Kazakhstan is the highest, which is 4-6 times of that in Yiwu county, Baishi lake and Dongba district; the porosity of Kazakhstan coal sample is relatively large and the porosity of Yiwu county is relatively small; after saturation the number of micropores in coal samples of Kazakhstan, Yiwu county, Dongba district and Baishi lake are reduced, and the number of small holes in Yiwu county, Dongba district and Baishi lake coal samples is much higher than that before saturation; the penetration rate of Kazakhstan coal samples is 3-20 times of that of domestic coal samples, which is related to the difference in porosity and pore size of each sample, and is also a reflection of the geological environment and the degree of development.

Key words: Low field nuclear magnetic resonance, Bituminous coal, Pore structure

CLC Number:

TQ533.9

Rahila·Abduwahit, MA Fengyun, ZHANG Xiang, LIU Jingmei, ZHONG Mei, ZHAO Xin. Application of low-field nuclear magnetic resonance technology in coal petrographic pore structure[J].Nuclear Techniques, 2017, 40(12): 120501-120501.

References

1 何雨丹. 核磁共振 T₂ 分布评价岩石孔径分布的改进方法[J]. 地球物理学报, 2005, 48(2):373-379. DOI:10.3321/j.issn:0001-5733.2005.02.020. HE Yudan. An improved method of using NMR T₂ distribution to evaluate pore size distribution[J]. Chinese Journal of Geophysics, 2005, 48(2):373-379. DOI:10.3321/j.issn:0001-5733.2005.02.020.
2 Kevin M, Douglas M, Smith A. NMR technique for the analysis of pore structure:numerical inversion of relaxation measurements[J]. Journal of Colloid & Interface Science, 1987, 119(1):117-126. DOI:10.1016/0021-9797(87)90250-5.
3 肖立志. 核磁共振成像测井与岩石核磁共振及其应用[M]. 北京:科学出版社, 1998. XIAO Lizhi. NMR imaging logging principles and applications[M]. Beijing:Science Press, 1998.
4 王为民, 赵刚, 谷长春, 等. 核磁共振岩屑分析技术的实验及应用研究[J]. 石油勘探与开发, 2005, 32(1):56-59. DOI:10.3321/j.issn:1000-0747.2005.01.014. WANG Weimin, ZHAO Gang, GU Changchun, et al. Experiment and application of NMR technology on cuttin98[J]. Petroleum Exploration and Development, 2005, 32(1):56-59. DOI:10.3321/j.issn:1000-0747.2005. 01.014.
5 张绪坤, 朱树森, 黄建华, 等. 用低场核磁分析胡萝卜切片干燥过程的内部水分变化[J]. 农业工程学报, 2012, 28(22):282-287. DOI:10.3969/j.issn.1002-6819.2012. 22.039. ZHANG Xukun, ZHU Shusen, HUANG Jianhua, et al.Analysis on internal moisture changes of carrot slices during drying process using low-field NMR[J]. Transactions of the Chinese Society of Agricultural Engineering, 2012, 28(22):282-287. DOI:10.3969/j.issn. 1002-6819.2012.22.039.
6 姚武. 水泥浆体中可蒸发水的 ¹H 核磁共振弛豫特征及状态演变[J]. 硅酸盐学报, 2009, 37(10):1602-1606. DOI:10.3321/j.issn:0454-5648.2009.10.002. YAO Wu. ¹H-NMR relaxation and state evolvement of evaporable water in cement pastes[J]. Journal of the Chinese Ceramic Society, 2009, 37(10):1602-1606. DOI:10.3321/j.issn:0454-5648.2009.10.002.
7 姚艳斌, 刘大锰. 基于 NMR 和 X-CT 的煤的孔裂隙精细定量表征[J]. 中国科学:地球科学, 2010, 40(11):1598-1607. DOI:10.1007/s11430-010-0057-4. YAO Yanbin, LIU Dameng. Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography[J]. Science China Earth Science, 2010, 40(11):1598-1607. DOI:10.1007/s11430-010-0057-4.
8 周凝, 刘宝林, 王欣. 核磁共振技术在食品分析检测中的应用[J]. 食品工业科技, 2011, 32(1):325-329. DOI:10.13386/j.issn1002-0306.2011.01.065. ZHOU Ning, LIU Baolin, WANG Xin. Application of nuclear magnetic resonance technology in food analysis and detection[J]. Science and Technology of Food Industry, 2011, 32(1):325-329. DOI:10.13386/j.issn1002-0306.2011.01.065.
9 Coates G R, Xiao L Z, Prammer M G. NMR logging principles and applications[M]. Houston (Texas):Gulf Publishing Company, 1999:1-76.
10 Yao Y B, Liu D M, Che Y, et al. Petrophysical characterization of coals by low-field nuclear magnetic resonance (NMR)[J]. Fuel, 2009, 89:1371-1380. DOI:10.1016/j.fuel.2009.11.005.

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Application of low-field nuclear magnetic resonance technology in coal petrographic pore structure

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