Volume 47 Issue 4
Aug.  2019
Turn off MathJax
Article Contents
Abstract
References
Related Articles
MA Huiteng, ZHAI Cheng, XU Jizhao, SUN Yong. Effect of NMR technology-based ultrasonic frequency on stimulated cracking of coal[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(4): 38-44. DOI: 10.3969/j.issn.1001-1986.2019.04.007
Citation: MA Huiteng, ZHAI Cheng, XU Jizhao, SUN Yong. Effect of NMR technology-based ultrasonic frequency on stimulated cracking of coal[J]. COAL GEOLOGY & EXPLORATION, 2019, 47(4): 38-44. DOI: 10.3969/j.issn.1001-1986.2019.04.007
shu

Effect of NMR technology-based ultrasonic frequency on stimulated cracking of coal

  • 1. School of Safety Engineering, China University of Mining & Technology, Xuzhou 221116, China;

  • 2. National Engineering Research Center for Coal Mine Gas Control, Xuzhou 221116, China

Funds: 

The General Program of the National Natural Science Foundation of China(51774278)

More Information
  • Received Date: October 28, 2018
  • Published Date: August 24, 2019
    Graphical Abstract
    • Abstract
  • In order to further study the effect of ultrasonic frequency on the stimulated cracking effect of coal, the paper conducted the crack experiment on the original coal samples by using the ultrasonic generation meter, and measured the coal by using the NMR equipment through analyzing the T2 curve, the changes of pore structure before and after coal sample cracking were deeply studied. The results show that the pore structure of coal can be effectively improved by the ultrasonic wave. After the crack induced by the ultrasonic wave, the pore quantity inside the coal increased and the total porosity, effective porosity and permeability all increased significantly. Meanwhile, the growth rate of the number of small pores in coal is negatively correlated with the frequency of ultrasonic wave, and the growth rate of the number of medium and large pores, total porosity, effective porosity and permeability are positively correlated with the frequency of ultrasonic wave. The results of this study provide a good theoretical value for ultrasonic stimulation to crack coal seam and reduce the difficulty of coal seam gas extraction.
    • FullText(HTML)
    • References (21)
  • [1]
    XU Jizhao,ZHAI Cheng,QIN Lei,et al. Mechanism and application of pulse hydraulic fracturing in improving drain-age of coalbed methane[J]. Journal of Natural Gas Science and Engineering,2017,40:79-90.
    [2]
    CAI Yidong,LIU Dameng,PAN Zhenjun,et al. Pore structure and its impact on CH4 adsorption capacity and flow capability of bituminous and subbituminous coals from northeast China[J]. Fuel,2013,103:258-268.
    [3]
    ZHANG Songhang,TANG Shuheng,ZHENG Qian,et al. Evaluation of geological features for deep coalbed methane reservoirs in the Dacheng Salient,Jizhong depression,China[J]. International Journal of Coal Geology,2014,133:60-71.
    [4]
    MULLAKAEV M S,ABRAMOV V O,ABRAMOVA A V. Development of ultrasonic equipment and technology for well stimulation and enhanced oil recovery[J]. Journal of Petroleum Science and Engineering,2015,125:201-208.
    [5]
    LIU Ting,LIN Baiquan,YANG Wei,et al. Dynamic diffusion-based multifield coupling model for gas drainage[J]. Journal of Natural Gas Science and Engineering,2017,44:233-249.
    [6]
    鲜学福. 我国煤层气开采利用现状及其产业化展望[J]. 重庆大学学报(自然科学版),2000,23(增刊1):1-5.

    XIAN Xuefu. Present situation of exploitation and utiliza-tion of coalbed methane and prospect of industrialization in China[J]. Journal of Chongqing University(Natural Science Edition),2000,23(S1):1-5.
    [7]
    赵丽娟,秦勇. 超声波作用对改善煤储层渗透性的实验分析[J]. 天然气地球科学,2014,25(5):747-752.

    ZHAO Lijuan,QIN Yong. Experiment on improving the permeability of coal reservoir under ultrasound[J]. Natural Gas Geoscience,2014,25(5):747-752.
    [8]
    聂百胜,何学秋,王恩元,等. 功率声波影响煤层甲烷储运的初步探讨[J]. 煤田地质与勘探,2004,32(6):23-26.

    NIE Baisheng,HE Xueqiu,WANG Enyuan,et al. Monitor study on broken floor depth caused by underground pres-sure[J]. Coal Geology & Exploration,2004,32(6):23-26.
    [9]
    赵鑫,肖晓春,潘一山,等. 超声机械效应致裂煤岩增渗规律研究[J]. 中国安全生产科学技术,2016,12(5):151-157.

    ZHAO Xin,XIAO Xiaochun,PAN Yishan,et al. Research on permeability enhancement laws of coal fracturing by ultrasound mechanical effect[J]. Journal of Safety Science and Technology,2016,12(5):151-157.
    [10]
    肖晓春,潘一山,吕祥锋,等. 超声激励低渗煤层甲烷增透机理[J].地球物理学报,2013,56(5):1726-1733.

    XIAO Xiaochun,PAN Yishan,LYU Xiangfeng,et al. Mechanism of methane permeability enhance through ultra-sonic irradiating on low permeable coal seam[J]. Chinese Journal of Geophysics,2013,56(5):1726-1733.
    [11]
    李建楼,严家平,王来斌,等. 煤体瓦斯在声波场作用下的放散特征研究[J]. 煤炭学报,2012,37(2):264-267.

    LI Jianlou,YAN Jiaping,WANG Laibin,et al. Study of characteristics of coal gas radiation in acoustic field[J]. Journal of China Coal Society,2012,37(2):264-267.
    [12]
    李建楼,严家平,胡水根,等. 气体压力对煤体瓦斯渗透特征的影响[J]. 采矿与安全工程学报,2013,30(2):307-310.

    LI Jianlou,YAN Jiaping,HU Shuigen,et al. Effect of gas pressure on infiltration characteristics of coal gas[J]. Journal of Mining & Safety Engineering,2013,30(2):307-310.
    [13]
    LI Jielin,KAUNDA R B,ZHOU Keping. Experimental investigations on the effects of ambient freeze-thaw cycling on dynamic properties and rock pore structure deterioration of sandstone[J]. Cold Regions Science and Technology,2018,154:133-141.
    [14]
    COHEN M H,MENDELSON K S. Nuclear magnetic relaxation and the internal geometry of sedimentary rocks[J]. Journal of Applied Physics,1982,53(2):1127-1135.
    [15]
    CAI Chengzheng,LI Gensheng,HUANG Zhongwei,et al. Experimental study of the effect of liquid nitrogen cooling on rock pore structure[J]. Journal of Natural Gas Science and Engineering,2014,21:507-517.
    [16]
    郑司建,姚艳斌,蔡益栋,等. 准噶尔盆地南缘低煤阶煤储层可动流体及孔径分布特征[J]. 煤田地质与勘探,2018,46(1):56-60.

    ZHENG Sijian,YAO Yanbin,CAI Yidong,et al. Characteristics of movable fluid and pore size distribution of low rank coals reservoir in southern margin of Junggar basin[J]. Coal Geology & Exploration,2018,46(1):56-60.
    [17]
    YAO Yanbin,LIU Dameng,CHE Yao,et al. Petrophysical characterization of coals by low-field nuclear magnetic reso-nance (NMR)[J]. Fuel,2010,89(7):1371-1380.
    [18]
    YAO Yanbin,LIU Dameng,CAI Yidong,et al. Advanced characterization of pores and fractures in coals by nuclear magnetic resonance and X-ray computed tomography[J]. Science China Earth Sciences,2010,53(6):854-862.
    [19]
    XU Jizhao,ZHAI Cheng,LIU Shimin,et al. Feasibility investigation of cryogenic effect from liquid carbon dioxide multi cycle fracturing technology in coalbed methane recovery[J]. Fuel,2017,206:371-380.
    [20]
    CAI Yidong,LIU Dameng,PAN Zhejun,et al. Petrophysical characterization of Chinese coal cores with heat treatment by nuclear magnetic resonance[J]. Fuel,2013,108:292-302.
    [21]
    WESTPHAL H,SURHOLT I,KIESL C,et al. NMR measurements in carbonate rocks:Problems and an approach to a solution[J]. Pure and Applied Geophysics,2005,162(3):549-570.
    • Related Articles

  • Related Articles

    [1]YU Xiang, YANG Ke, HE Xiang, HOU Yongqiang, WEN Zhiqiang, ZHANG Lianfu. Strength and damage characteristics of cemented gangue backfill during saturated immersion[J]. COAL GEOLOGY & EXPLORATION, 2025, 53(2): 147-159. DOI: 10.12363/issn.1001-1986.24.05.0313
    [2]MENG Xiangzhen, ZHANG Huimei, LI Yugen, YUAN Chao, CHEN Shiguan. A dynamic damage rate-based constitutive model for rock damage[J]. COAL GEOLOGY & EXPLORATION, 2024, 52(10): 119-128. DOI: 10.12363/issn.1001-1986.24.02.0131
    [3]MENG Xiangzhen, ZHANG Huimei, LI Yugen, YUAN Chao, CHEN Shiguan. A dynamic damage rate-based constitutive model for rock damage[J]. COAL GEOLOGY & EXPLORATION.
    [4]YU Xiang, YANG Ke, HE Xiang, HON Yongqiang, WEN Zhiqiang, ZHANG Lianfu. Study on strength and damage characteristics of saturated immersion gangue cemented backfill[J]. COAL GEOLOGY & EXPLORATION.
    [5]WEN Tao, TANG Huiming, LIU Yourong, WANG Kang, YANG Chenggang. Energy and damage analysis of slate during triaxial compression under different confining pressures[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(3): 80-86. DOI: 10.3969/j.issn.1001-1986.2016.03.015
    [6]ZHANG Limin, ZHANG Hui, LIU Hongyan. A damage constitutive model for rock mass with non-persistently closed joints under uniaxial compression load[J]. COAL GEOLOGY & EXPLORATION, 2016, 44(1): 79-84. DOI: 10.3969/j.issn.1001-1986.2016.01.015
    [7]ZHANG Jihong, LIU Hongyan. Constitutive model of jointed rock mass by combining macroscopic and microcopic composite damage[J]. COAL GEOLOGY & EXPLORATION, 2013, 41(6): 49-52. DOI: 10.3969/j.issn.1001-1986.2013.06.012
    [8]WANG Yiming, ZHOU Yitao, ZHOU Qingdong, DU Xigang. Variable measure of strain damage of geotechnical materials[J]. COAL GEOLOGY & EXPLORATION, 2013, 41(1): 54-57. DOI: 10.3969/j.issn.1001-1986.2013.01.011
    [9]YE Xiao-ping, LI Man, SUN Qiang. Creep damage model of soft rock roadway[J]. COAL GEOLOGY & EXPLORATION, 2009, 37(2): 44-46,62.
    [10]SONG Fei, ZHAO Fa-suo. Study on statistical damage constitutive model in consideration of damage threshold[J]. COAL GEOLOGY & EXPLORATION, 2007, 35(3): 59-62.

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (108) PDF downloads (8) Cited by()
    Related

    Copyright of website design © Editorial Office of Coal Geology & Exploration 陕ICP备05001372号-6 陕公网安备 61019002002193号

    Address: Editorial Office of Coal Geology & Exploration, No.82 Jinye 1st Rd, High-Tech Zone, Xi'an City, Shaanxi, China

    Tel: 029-81778075 E-mail: ccrimtdzykt@vip.163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return