WU Jian, TANG Dazhen, LI Song, REN Pengfei. Characteristics and influence factors of pore structure of coal reservoirs in the eastern margin of Ordos basin[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(5): 58-65. DOI: 10.3969/j.issn.1001-1986.2017.05.011
Citation: WU Jian, TANG Dazhen, LI Song, REN Pengfei. Characteristics and influence factors of pore structure of coal reservoirs in the eastern margin of Ordos basin[J]. COAL GEOLOGY & EXPLORATION, 2017, 45(5): 58-65. DOI: 10.3969/j.issn.1001-1986.2017.05.011

Characteristics and influence factors of pore structure of coal reservoirs in the eastern margin of Ordos basin

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National Science and Technology Major Project(2011ZX05042-001)

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  • Received Date: May 11, 2016
  • Published Date: October 24, 2017
  • Based on the coal reservoir in eastern margin of Ordos basin, by vitrinite reflectance measurement and pressure mercury testing and cryogenic liquid nitrogen adsorption experiment, the characteristics and influence factors of pore structure were discussed and analyzed. The results show: the porosity of coal reservoir in the study area is low, and the trend of the north to south is obviously lower. The coal reservoir is mainly based on the transitional pores and micro pores. BET of coal reservoir is 1.26 m2/g, larger in the north. Due to the influence of the relative content of inertinite, the degree of compression and secondary pore, BJH of coal reservoir is 0.003 41 mL/g. With the increase of coal metamorphism, the porosity, BJH and BET of coal rank had a trend of “high-low-high”, and attained the minimal value when Rmax was 1.5%. With the increase of stress of coal reservoir, the micro pores were closed, and the number of other types of pores was reduced, and the content of transitional pores increased relatively. In coal, the pore types of the adsorption changed from the closed type to open type. The stress acting on the development of coal had strong control effect, which is mainly reflected in the contribution of the large pores to CBM.
  • [1]
    CLOSE J C. Natural fracture in coal[C]//LAW B E,RICE D D. Hydrocarbons from coal. AAPG,38:119-132.
    [2]
    SHI Jiquan,DURUCAN S. Gas storage and flow in coalbed reservoirs: Implementation of a bidisperse pore model for gas diffusion in coal matrix[C]//Society of Petroleum Engineers. SPE Annual Technical Conference and Exhibition,5-8 October,Denver,Colorado,2003:2495-2503.
    [3]
    LI Song,TANG Dazhen,XU Hao,et al. The pore-fracture system properties of coalbed methane reservoir in the Panguan syncline,Guizhou,China[J]. Geoscience Frontiers,2012,10:1-10.
    [4]
    刘大锰,李振涛,蔡益栋. 煤储层孔-裂隙非均质性及其地质影响因素研究进展[J]. 煤炭科学技术,2015,43(2):10-15.

    LIU Dameng,LI Zhentao,CAI Yidong. Study progress on pore-crack heterogeneity and geological influence factors of coal reservoir[J]. Coal Science and Technology,2015,43(2):10-15.
    [5]
    张尚虎, 汤达祯, 王明寿. 沁水盆地煤储层孔隙差异发育主控因素[J]. 天然气工业, 2005, 25(1):37-40.

    ZHANG Shanghu,TANG Dazhen,WANG Mingshou. Main control factor affecting pore differential development of the coal reservoirs in Qinshui basin[J]. Natural Gas Industry,2005,25(1):37-40.
    [6]
    赵兴龙,汤达祯,许浩,等. 煤变质作用对煤储层孔隙系统发育的影响[J]. 煤炭学报,2010,35(9):1506-1511.

    ZHAO Xinglong,TANG Dazhen,XU Hao,et al. Effect of coal metamorphic process on pore system of coal reservoirs[J]. Journal of China Coal Society,2010,35(9):1506-1511.
    [7]
    琚宜文,姜波,侯泉林,等. 华北南部构造煤纳米级孔隙结构演化特征及作用机理[J]. 地质学报,2006,79(2):269-285.

    JU Yiwen,JIANG Bo,HOU Quanlin,et al. Structural evolution of nano-scale pores of tectonic coals in southern North China and its mechanism[J]. Acta Geologica Sinica,2006,79(2):269-285.
    [8]
    范俊佳,琚宜文,侯泉林,等. 不同变质变形煤储层孔隙特征与煤层气可采性[J]. 地学前缘,2010,17(5):325-335.

    FAN Junjia,JU Yiwen,HOU Quanlin,et al. Pore structure characteristics of different metamorphic-deformed coal reservoirs and its restriction on recovery of coalbed methane[J]. Earth Science Frontiers,2010,17(5):325-335.
    [9]
    刘大锰,姚艳斌,蔡益栋,等. 华北石炭-二叠系煤的孔渗特征及主控因素[J]. 现代地质,2010,24(6):1198-1203.

    LIU Dameng,YAO Yanbin,CAI Yidong,et al. Characteristics of porosity and permeability and their geological control of Permo-Carboniferous coals in North China[J]. Geoscience,2010,24(6):1198-1203.
    [10]
    冯三利,叶建平,张遂安. 鄂尔多斯盆地煤层气资源及开发潜力分析[J]. 地质通报,2002,21(10):658-662.

    FENG Sanli,YE Jianping,ZHANG Suian. Coalbed methane resources in the Ordos basin and its development potential[J]. Regional Geology of China,2002,21(10):658-662.
    [11]
    张松航,汤达祯,唐书恒,等. 鄂尔多斯盆地东缘煤层气储集与产出条件[J]. 煤炭学报,2009,34(10):1297-1304.

    ZHANG Songhang,TANG Dazhen,TANG Shuheng,et al. Preservation and deliverability characteristics of coalbed methane in east margin of Ordos basin[J]. Journal of China Coal Society,2009,34(10):1297-1304.
    [12]
    接铭训. 鄂尔多斯盆地东缘煤层气勘探开发前景[J]. 天然气工业,2010,30(6):1-6.

    JIE Mingxun. Prospects in coalbed methane gas exploration and production in the eastern Ordos basin[J]. Natural Gas Industry, 2010,30(6):1-6.
    [13]
    张松航. 鄂尔多斯盆地东缘煤层气储层物性研究[D]. 北京:中国地质大学(北京),2008.
    [14]
    XoДoT B B.煤与瓦斯突出[M]. 宋士钊,王佑安,译.北京:中国工业出版社,1996:27-30.
    [15]
    YAO Yanbin,LIU Dameng,TANG Dazhen,et al.Fractal characterization of adsorption-pores of coals from north China:An investigation on CH4 adsorption capacity of coal[J].International Journal of Coal Geology,2008,73:27-42.
    [16]
    YAO Yanbin,LIU Dameng,TANG Dazhen,et al. Fractal characterization of seepage-pores of coals from China:An investigation on permeability of coals[J].Computers & Geosciences,2009,35:1159-1166.
    [17]
    蔡佳丽,汤达祯,许浩,等. 黔西上二叠统煤的孔隙特征及其控制因素[J]. 煤田地质与勘探,2011,39(5):6-10.

    CAI Jiali,TANG Dazhen,XU Hao,et al.Pore characteristics and controlling factors of Upper Permian coal in western Guizhou[J]. Coal Geology & Exploration,2011,39(5):6-10.
    [18]
    傅雪海,秦勇,韦重韬. 煤层气地质学[M]. 徐州:中国矿业大学出版社,2003.
    [19]
    陈平中,薄冬梅,赵永军. 煤储层储集性能主控因素分析[J].石油天然气学报,2010,32(1):13-16.

    CHEN Pingzhong,BO Dongmei,ZHAO Yongjun. Analysis on the major control factors of coal-bed reservoir property[J].Journal of Oil and Gas Technology,2010,32(1):13-16.
    [20]
    刘爱华,傅雪海,梁文庆,等. 不同煤阶煤孔隙分布特征及其对煤层气开发的影响[J]. 煤炭科学技术,2013,41(4):104-108.

    LIU Aihua,FU Xuehai,LIANG Wenqing,el al. Pore distribution features of different rank coal and influences to coalbed methane development[J]. Coal Science and Technology,2013,41(4):104-108.
    [21]
    钟玲文,张慧,员争荣,等. 煤的比表面积和孔体积及其对煤吸附能力的影响[J]. 煤田地质与勘探,2002,30(3):26-28.

    ZHONG Lingwen,ZHANG Hui,YUN Zhengrong,et al. Influence of specific pore area and pore volume of coal on adsorption capacity[J]. Coal Geology & Exploration,2002,30(3):26-28.
    [22]
    李松,汤达祯,许浩,等. 贵州省织金、纳雍地区煤储层物性特征研究[J]. 中国矿业大学学报,2012,41(6):951-958.

    LI Song,TANG Dangzhen,XU Hao,et al. Characteristic of coal reservoirs in Zhijin and Nayong area,Guizhou Province[J]. Journal of China University of Mining & Technology,2012,41(6):951-958.
    [23]
    唐书恒,蔡超,朱宝存,等. 煤变质程度对煤储层物性的控制作用[J]. 天然气工业,2008,28(12):30-33.

    TANG Shuheng,CAI Chao,ZHU Baocun,et al. Control effect of coal metamorphic degree on physical properties of coal reservoirs[J]. Natural Gas Industry,2008,28(12):30-33.
    [24]
    秦勇,申建,王宝文,等. 深部煤层气成藏效应及其耦合关系[J]. 石油学报,2012,33(1):48-54.

    QIN Yong,SHEN Jian,WANG Baowen,el al. Accumulation effects and coupling relationship of deep coalbed methane[J]. Acta Petrolei Sinica,2012,33(1):48-54.
    [25]
    许浩,张尚虎,冷雪,等. 沁水盆地煤储层孔隙系统模型与物性分析[J]. 科学通报,2005,50(增刊1):45-50.

    XU Hao,ZHANG Shanghu,LENG Xue,et al. Analysis of coal reservoir in Qinshui basin model and layer pore system[J]. Chinese Science Bulletin,2005,50(S1):45-50.
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