基于低温液氮吸附实验的成庄井田3号煤孔隙特征研究
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摘要
煤的孔隙特征控制着煤的吸附、扩散和渗流特性,采用低温液氮吸附实验对成庄井田3号煤孔隙特征进行了研究。结果表明:煤中孔径小于4 nm的孔隙多为一端开口孔,孔径大于4 nm的孔隙多为两端开口的孔、墨水瓶孔和少量一端开口的孔;煤中孔隙主要为过渡孔和微孔,大孔、中孔不甚发育,使得煤孔比表面积相对较大、孔容相对较小,有利于煤层气的吸附、凝聚储集和扩散运移。
The pore characteristics of coal control the adsorption,diffusion and seepage characteristics of coal.The author studied the pore characteristics of No.3 coal seam in Chengzhuang Mine Field by low temperature liquid nitrogen adsorption experiment.The results showed that the pores with pore diameter less than 4 nm in coal are mostly open pores at one end,and the pores with pore diameter greater than 4 nm were mostly open pores at both ends,ink bottle pores and a small number of pores with one end open;the pores in coal are mainly transition pores and micropores.The macropores and mesopores were not well developed,which made the specific pore surface area of coal pores relatively large and the pore volume relatively small,which was beneficial to the adsorption,coalescence and diffusion of coalbed methane.
The pore characteristics of coal control the adsorption,diffusion and seepage characteristics of coal.The author studied the pore characteristics of No.3 coal seam in Chengzhuang Mine Field by low temperature liquid nitrogen adsorption experiment.The results showed that the pores with pore diameter less than 4 nm in coal are mostly open pores at one end,and the pores with pore diameter greater than 4 nm were mostly open pores at both ends,ink bottle pores and a small number of pores with one end open;the pores in coal are mainly transition pores and micropores.The macropores and mesopores were not well developed,which made the specific pore surface area of coal pores relatively large and the pore volume relatively small,which was beneficial to the adsorption,coalescence and diffusion of coalbed methane.
引文
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[16] 吴强,于洋,高霞,等.七星矿煤体的微观孔隙结构特征[J].黑龙江科技大学学报,2018,28(4):374-378,404.Wu Qiang,Yu Yang,Gao Xia,et al.Characteristics behind microscopic pore structure of coal from Qixing Mine[J].Journal of Heilongjiang University of Science & Technology,2018,28(4):374-378,404.
[17] 杨峰,宁正福,孔德涛,等.高压压汞法和氮气吸附法分析页岩孔隙结构[J].天然气地球科学,2013,24(3):450-455.Yang Feng,Ning Zhengfu,Kong Detao,et al.Analysis of shale pore structure by high pressure mercury intrusion and nitrogen adsorption[J].Natural Gas Geoscience,2013,24(3):450-455.
[18] 赵志根,蒋新生.谈煤的孔隙大小分类[J].标准化报道,2000,21(5):23-24.Zhao Zhigen,Jiang Xinsheng.Talking about the pore size classification of coal[J].Reporting of Standard Ization,2000,21(5):23-24.
[19] B.B.霍多特,宋士钊,王佑安.煤与瓦斯突出[M].北京:中国工业出版社,1966.
[20] 程庆迎.煤的孔隙和裂隙研究现状[J].煤炭工程,2011(12):91-93.Cheng Qingying.Research status of pore and crack in coal[J].Coal Engineering,2011(12):91-93.
[21] 钟玲文,张慧.煤的比表面积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.Specific surface area pore volume of coal and its effect on coal adsorption capacity[J].Coal Geology & Exploration,2002,30(3):26-28.
[22] 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.
[23] 祝武权,汤达祯,喻廷旭,等.页岩氮气吸附BET比表面积测定误差校正方法[J].科学技术与工程,2015,15(29):29-32.Zhu Wuquan,Tang Dazhen,Yu Tingxu,et al.Error correction method for BET specific surface area measurement of shale nitrogen adsorption[J].Science Technology and Engineering,2015,15(29):29-32.
[24] 赵丽娟,秦勇.鄂尔多斯盆地东部煤岩孔隙特征实验分析[J].中国煤炭地质,2014,26(1):22-25,33.Zhao Lijuan,Qin Yong.Experimental analysis of coal and rock pore characteristics in Eastern Ordos Basin[J].Coal Geology of China,2014,26(1):22-25,33.
[25] 胡广青,姜波,吴胡.中梁山矿区煤的孔隙特征及其对吸附性的影响[J].中国煤炭地质,2011,23(5):8-12.Hu Guangqing,Jiang Bo,Wu Hu.Pore characteristics of coal and its impact on adsorptivity in Zhongliangshan Mining Area[J].Coal Geology of China,2011,23(5):8-12.
[26] 王敬谋.煤孔隙结构随埋深变化特征研究[J].山东工业技术,2018(3):78.Wang Jingmou.Study on the variation characteristics of coal pore structure with burial depth[J].Shandong Industrial Technology,2018(3):78.
[27] 邵春景,屈争辉,尹宏伟,等.过渡相煤系泥页岩纳米级孔隙结构非均质性表征及主控因素—以淮南煤田二叠系为例[J].地球科学与环境学报,2018,40(4):449-461.Shao Chunjing,Qu Zhenghui,Yin Hongwei,et al.Heterogeneity characterization and main control factors of nanoscale pore structure of the transitional coal measures shale:a case study of permian in Huainan Coalfield[J].Journal of Earth Sciences and Environment,2018,40(4):449-461.
[28] 杨光,秦勇,吴财芳,等.新疆和什托洛盖盆地西山窑组低阶煤孔隙结构特征[J].煤炭科学技术,2017,45(4):123-130.Yang Guang,Qin Yong,Wu Caifang,et al.Pore structure features of Xishanyao Formation low rank coal in Hoxtolgay Basin of Xinjiang[J].Coal Science and Technology,2017,45(4):123-130.
[2] 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.
[3] 降文萍,宋孝忠,钟玲文.基于低温液氮实验的不同煤体结构煤的孔隙特征及其对瓦斯突出影响[J].煤炭学报,2011,36(4):609-614.Jiang Wenping,Song Xiaozhong,Zhong Lingwen.Research on the pore properties of different coal body structure coals and the effects on gas outburst based on the low-temperature nitrogen adsorption method[J].Journal of China Coal Society,2011,36(4):609-614.
[4] 王明寿,汤达桢,张尚虎.煤储层孔隙研究现状及其意义[J].中国煤层气,2004,1(2):9-11.Wang Mingshou,Tang Dazhen,Zhang Shanghu.Current status and significance of coal reservoir pore research[J].China Coalbed Methane,2004,1(2):9-11.
[5] 李瑾,杨昌永.新景矿3号煤层不同煤体结构煤孔裂隙的扫描电镜研究[J].煤,2018,27(12):10-12.Li Jin,Yang Changyong.Scanning electron microscope study of coal hole fissure with different coal structure in No.3 coal seam of Xinjing Mine[J].Coal,2018,27(12):10-12.
[6] 孟磊,姜耀东,赵毅鑫.华北区域不同煤阶样品孔隙结构特性研究[J].煤炭工程,2014,46(6):118-120.Meng Lei,Jiang Yaodong,Zhao Yixin.Investigation on pore structure characteristics coal from North China[J].Coal Engineering,2014,46(6):118-120.
[7] 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,et al.Pore distribution features of different rank coal and influence to coal bed methane development[J].Coal Science and Technology,2013,41(4):104-108.
[8] 张松航,汤达祯,唐书恒,等.鄂尔多斯盆地东缘煤储层微孔隙结构特征及其影响因素[J].地质学报,2008,82(10):1341-1349.Zhang Songhang,Tang Dazhen,Tang Shuheng,et al.Micro-pore structure characteristics and its influencing factors of coal reservoirs in the eastern margin of the Ordos Basin[J].Acta Geological Sinica,2008,82(10):1341-1349.
[9] 戚灵灵,王兆丰,杨宏民,等.基于低温液氮法和压汞法的煤样孔隙研究[J].煤炭科学技术,2012,40(8):36-39.Qi Lingling,Wang Zhaofeng,Yang Hongmin,et al.Study on porosity of coal samples based on low temperature nitrogen adsorption method and mercury porosimetry[J].Coal Science and Technology,2012,40(8):36-39.
[10] 张小东,丁哲,王勃,等.不同煤级煤低温氮的多段吸附特征[J].河南理工大学学报(自然科学版),2016,35(6):775-781.Zhang Xiaodong,Ding Zhe,Wang Bo,et al.The multi-stage adsorption characteristics of coal with different ranks under the condition of cryogenic liquid nitrogen[J].Journal of Henan Polytechnic University(Natural Science),2016,35(6):775-781.
[11] 马东民,马薇,蔺亚兵.煤层气解吸滞后特征分析[J].煤炭学报,2012,37(11):1885-1889.Ma Dongmin,Ma Wei,Lin Yabing.Desorption hysteresis characteristics of CBM[J].Journal of China Coal Society,2012,37(11):1885-1889.
[12] 党广兴,吴财芳,王博.煤样吸附/解吸滞后效应定量分析[J].煤炭科学技术,2017,45(5):187-191,222.Dang Guangxing,Wu Caifang,Wang Bo.Quantitative analysis of methane adsorption/desorption hysteresis effect on coal sample[J].Coal Science and Technology,2017,45(5):187-191,222.
[13] 杜玉娥.煤的孔隙特征对煤层气解吸的影响[D].西安:西安科技大学,2010:36-37.
[14] 蔺亚兵,贾雪梅,马东民.基于液氮吸附法对煤的孔隙特征研究与应用[J].煤炭科学技术,2016,44(3):135-140.Lin Yabing,Jia Xuemei,Ma Dongmin.Study and application of the porosity characteristics of coal based on liquid nitrogen absorption method[J].Coal Science and Technology,2016,44(3):135-140.
[15] 胡广青,姜波,吴胡.中梁山矿区煤的孔隙特征及其对吸附性的影响[J].中国煤炭地质,2011,23(5):8-12.Hu Guangqing,Jiang Bo,Wu Hu.Pore characteristics of coal and impact on adsorption in Zhongliangshan mining area[J].Coal Geology of China,2011,23(5):8-12.
[16] 吴强,于洋,高霞,等.七星矿煤体的微观孔隙结构特征[J].黑龙江科技大学学报,2018,28(4):374-378,404.Wu Qiang,Yu Yang,Gao Xia,et al.Characteristics behind microscopic pore structure of coal from Qixing Mine[J].Journal of Heilongjiang University of Science & Technology,2018,28(4):374-378,404.
[17] 杨峰,宁正福,孔德涛,等.高压压汞法和氮气吸附法分析页岩孔隙结构[J].天然气地球科学,2013,24(3):450-455.Yang Feng,Ning Zhengfu,Kong Detao,et al.Analysis of shale pore structure by high pressure mercury intrusion and nitrogen adsorption[J].Natural Gas Geoscience,2013,24(3):450-455.
[18] 赵志根,蒋新生.谈煤的孔隙大小分类[J].标准化报道,2000,21(5):23-24.Zhao Zhigen,Jiang Xinsheng.Talking about the pore size classification of coal[J].Reporting of Standard Ization,2000,21(5):23-24.
[19] B.B.霍多特,宋士钊,王佑安.煤与瓦斯突出[M].北京:中国工业出版社,1966.
[20] 程庆迎.煤的孔隙和裂隙研究现状[J].煤炭工程,2011(12):91-93.Cheng Qingying.Research status of pore and crack in coal[J].Coal Engineering,2011(12):91-93.
[21] 钟玲文,张慧.煤的比表面积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.Specific surface area pore volume of coal and its effect on coal adsorption capacity[J].Coal Geology & Exploration,2002,30(3):26-28.
[22] 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.
[23] 祝武权,汤达祯,喻廷旭,等.页岩氮气吸附BET比表面积测定误差校正方法[J].科学技术与工程,2015,15(29):29-32.Zhu Wuquan,Tang Dazhen,Yu Tingxu,et al.Error correction method for BET specific surface area measurement of shale nitrogen adsorption[J].Science Technology and Engineering,2015,15(29):29-32.
[24] 赵丽娟,秦勇.鄂尔多斯盆地东部煤岩孔隙特征实验分析[J].中国煤炭地质,2014,26(1):22-25,33.Zhao Lijuan,Qin Yong.Experimental analysis of coal and rock pore characteristics in Eastern Ordos Basin[J].Coal Geology of China,2014,26(1):22-25,33.
[25] 胡广青,姜波,吴胡.中梁山矿区煤的孔隙特征及其对吸附性的影响[J].中国煤炭地质,2011,23(5):8-12.Hu Guangqing,Jiang Bo,Wu Hu.Pore characteristics of coal and its impact on adsorptivity in Zhongliangshan Mining Area[J].Coal Geology of China,2011,23(5):8-12.
[26] 王敬谋.煤孔隙结构随埋深变化特征研究[J].山东工业技术,2018(3):78.Wang Jingmou.Study on the variation characteristics of coal pore structure with burial depth[J].Shandong Industrial Technology,2018(3):78.
[27] 邵春景,屈争辉,尹宏伟,等.过渡相煤系泥页岩纳米级孔隙结构非均质性表征及主控因素—以淮南煤田二叠系为例[J].地球科学与环境学报,2018,40(4):449-461.Shao Chunjing,Qu Zhenghui,Yin Hongwei,et al.Heterogeneity characterization and main control factors of nanoscale pore structure of the transitional coal measures shale:a case study of permian in Huainan Coalfield[J].Journal of Earth Sciences and Environment,2018,40(4):449-461.
[28] 杨光,秦勇,吴财芳,等.新疆和什托洛盖盆地西山窑组低阶煤孔隙结构特征[J].煤炭科学技术,2017,45(4):123-130.Yang Guang,Qin Yong,Wu Caifang,et al.Pore structure features of Xishanyao Formation low rank coal in Hoxtolgay Basin of Xinjiang[J].Coal Science and Technology,2017,45(4):123-130.