基于扫描电镜的寺河矿3号煤微孔裂隙精细定量表征
|
摘要
煤的微孔裂隙是控制煤层气赋存和运移最为关键的因素,为了实现对寺河矿3号煤的微孔裂隙精细定量表征,利用EVO MA15钨灯丝扫描电子显微镜对其进行了大量观测和分析。研究发现:寺河矿3号煤中可见气孔、摩擦孔、溶蚀孔、铸模孔4种不同成因类型微孔隙发育且孔隙的连通性较差,不同成因类型微孔隙的发育程度、形态、大小、充填情况及其连通性等有所不同;煤中张、剪裂隙较发育,裂隙多呈张开状态且部分被充填;剪裂隙仅发育于原生结构煤中,而碎裂煤中张、剪裂隙均有发育,它们的展布形态、裂隙面宽度、裂隙充填情况等各异。
Coal microporous fissures are the key factor to control the occurrence and migration of coalbed methane.In order to realize the fine quantitative characterization of microporous fissures in No.3 coal seam of Sihe Coal Mine,EVO MA15 tungsten filament scanning electron microscopy was used to observe and analyze a large number of them.It was found that there were four different genetic types of micropore in No.3 coal seam of Sihe Coal Mine:gas pore,friction pore,corrosion pore and casting pore,and the connectivity of micropore was poor.The development degree,shape,size,filling condition and connectivity of micropore were different in different genetic types.Tensile and shear cracks were well developed and there were many cracks in coal.It was open and partially filled.The shear fracture only develops in the primary structure coal,while the tension and shear cracks in the fractured coal develop.Their distribution patterns,width of fracture surface and filling conditions were different.
Coal microporous fissures are the key factor to control the occurrence and migration of coalbed methane.In order to realize the fine quantitative characterization of microporous fissures in No.3 coal seam of Sihe Coal Mine,EVO MA15 tungsten filament scanning electron microscopy was used to observe and analyze a large number of them.It was found that there were four different genetic types of micropore in No.3 coal seam of Sihe Coal Mine:gas pore,friction pore,corrosion pore and casting pore,and the connectivity of micropore was poor.The development degree,shape,size,filling condition and connectivity of micropore were different in different genetic types.Tensile and shear cracks were well developed and there were many cracks in coal.It was open and partially filled.The shear fracture only develops in the primary structure coal,while the tension and shear cracks in the fractured coal develop.Their distribution patterns,width of fracture surface and filling conditions were different.
引文
[1] 刘继滨,寇双燕,刘继芹.煤层气—水两相三孔介质渗流规律研究[J].石油化工应用,2017,36(10):20-25.Liu Jibin,Kou Shuangyan,Liu Jiqin.Study on seepage law of coalbed methane-water two-phase three-pore medium[J].Petrochemical Industry Application,2017,36(10):20-25.
[2] 降文萍,张群,姜在炳,等.构造煤孔隙结构对煤层气产气特征的影响[J].天然气地球科学,2016,27(1):173-179.Jiang Wenping,Zhang Qun,Jiang Zaibing,et al.Influence of structural coal pore structure on gas production characteristics of coalbed methane[J].Natural Gas Geoscience,2016,27(1):173-179.
[3] 刘人和,刘飞,周文,等.沁水盆地煤岩储层特征及有利区预测[J].油气地质与采收率,2008,15(4):16-19.Liu Renhe,Liu Fei,Zhou Wen,et al.Coal and rock reservoir characteristics and favorable area prediction in Qinshui Basin[J].Petroleum Geology and Recovery Efficiency,2008,15(4):16-19.
[4] 陈文文,陈龙伟,杨艳磊,等.高阶煤储层微孔裂隙发育特征及与产能的关系——以樊庄、郑庄区块为例[C]//北京:中国石油学会天然气专业委员会,2016.
[5] 刘畅.煤储层微裂缝对煤层气采收率影响的数值分析[J].桂林理工大学学报,2017,37(4):580-586.Liu Chang.Numerical analysis of influence of micro-cracks in coal reservoir on coalbed methane recovery[J].Journal of Guilin University of Technology,2017,37(4):580-586.
[6] 宋周成.低渗透储层的微观孔隙结构分类及其储层改造技术的探讨[J].石油天然气学报,2009,31(1):334-336.Song Zhoucheng.Microscopic pore structure classification of low permeability reservoirs and discussion on reservoir reconstruction technology[J].Journal of Oil and Gas Technology,2009,31(1):334-336.
[7] Kendall P E,Briggs H.The formation of rock joints and the cleat of coal[J].Proc R.Soc.Edinburgh,1933(53):164-187.
[8] Admakin L A.State factors of organic system and petrogenesis of coal[J].Coke & Chemistry,2010,53(8):281-289.
[9] 张素新,肖红艳.煤储层中微孔隙和微裂隙的扫描电镜研究[J].电子显微学报,2000,19(4):531-532.Zhang Suxin,Xiao Hongyan.Scanning electron microscopy study of micro-voids and micro-cracks in coal reservoirs[J].Journal of Chinese Electron Microscopy Society,2000,19(4):531-532.
[10] 孙月龙,崔洪庆,关金锋.基于图像识别的煤层井下宏观裂隙观测[J].煤田地质与勘探,2017,45(5):23-26.Sun Yuelong,Cui Hongqing,Guan Jinfeng.Image recognition-based observation of macro-fracture in coal seam in underground mine[J].Coal Geology & Exploration,2017,45(5):23-26.
[11] 王恩元,何学秋.煤层孔隙裂隙系统的分形描述及其应用[J].阜新矿业学院学报(自然科学版),1996,15(4):407-410.Wang Enyuan,He Xueqiu.Fractal description and application of coal seam pore fracture system[J].Journal of Fuxin Mining Institute(Natural Science),1996,15(4):407-410.
[12] 贾小宝,牛海萍,刘鸿福,等.基于微焦点显微CT技术的不同煤体结构煤的孔裂隙定量表征[J].煤矿安全,2018,49(11):32-36.Jia Xiaobao,Niu Haiping,Liu Hongfu,et al.Quantitative characterization of pore fissures for different coal structures based on CT[J].Safety in Coal Mines,2018,49(11):32-36.
[13] 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 of coal from north China[J].Coal Engineering,2014,46(6):118-120.
[14] 霍永忠,张爱云.煤层气储层的显微孔裂隙成因分类及其应用[J].煤田地质与勘探,1998(6):28-32.Huo Yongzhong,Zhang Aiyun.Classification of microporous fissures in coalbed methane reservoirs and their applications[J].Coal Geology & Exploration,1998(6):28-32.
[15] 刘会虎,桑树勋,薛俊华,等.沁南东古城区块3号煤储层显微孔裂隙特征及其成因[J].煤炭技术,2018,37(12):86-88.Liu Huihu,Sang Shuxun,Xue Junhua,et al.Micro-cavity fracture characteristics and its genesis of block No.3 coal reservoir in Gucheng blocks,Southern Surabaya Basin[J].Coal Technology,2018,37(12):86-88.
[16] 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.
[17] 程庆迎,黄炳香,李增华.煤岩体孔隙裂隙实验方法研究进展[J].中国矿业,2012,21(1):115-118.Cheng Qingying,Huang Bingxiang,Li Zenghua.Research progress in coal or rock pore and fractures[J].China Mining Magazine,2012,21(1):115-118.
[18] 郝琦.煤的显微孔隙形态特征及其成因探讨[J].煤炭学报,1987(4):51-61.Hao Qi.Microscopic porosity morphology of coal and its causes[J].Journal of China Coal Society,1987(4):51-61.
[19] 张慧.煤孔隙的成因类型及其研究[J].煤炭学报,2001,26(1):40-44.Zhang Hui.Genetic types of coal pores and their research[J].Journal of China Coal Society,2001,26(1):40-44.
[20] 刘才华,陈从新,付少兰.剪应力作用下岩体裂隙渗流特性研究[J].岩石力学与工程学报,2003,22(10):1651-1656.Liu Caihua,Chen Congxin,Fu Shaolan.Study on seepage characteristics of a single rock fracture under shear stresses[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(10):1651-1656.
[21] 曾联波,漆家福,王成刚,等.构造应力对裂缝形成与流体流动的影响[J].地学前缘,2008,15(3):292-298.Zeng Lianbo,Qi Jiafu,Wang Chenggang,et al.Influence of tectonic stress on fracture formation and fluid flow[J].Earth Science Frontiers,2008,15(3):292-298.
[2] 降文萍,张群,姜在炳,等.构造煤孔隙结构对煤层气产气特征的影响[J].天然气地球科学,2016,27(1):173-179.Jiang Wenping,Zhang Qun,Jiang Zaibing,et al.Influence of structural coal pore structure on gas production characteristics of coalbed methane[J].Natural Gas Geoscience,2016,27(1):173-179.
[3] 刘人和,刘飞,周文,等.沁水盆地煤岩储层特征及有利区预测[J].油气地质与采收率,2008,15(4):16-19.Liu Renhe,Liu Fei,Zhou Wen,et al.Coal and rock reservoir characteristics and favorable area prediction in Qinshui Basin[J].Petroleum Geology and Recovery Efficiency,2008,15(4):16-19.
[4] 陈文文,陈龙伟,杨艳磊,等.高阶煤储层微孔裂隙发育特征及与产能的关系——以樊庄、郑庄区块为例[C]//北京:中国石油学会天然气专业委员会,2016.
[5] 刘畅.煤储层微裂缝对煤层气采收率影响的数值分析[J].桂林理工大学学报,2017,37(4):580-586.Liu Chang.Numerical analysis of influence of micro-cracks in coal reservoir on coalbed methane recovery[J].Journal of Guilin University of Technology,2017,37(4):580-586.
[6] 宋周成.低渗透储层的微观孔隙结构分类及其储层改造技术的探讨[J].石油天然气学报,2009,31(1):334-336.Song Zhoucheng.Microscopic pore structure classification of low permeability reservoirs and discussion on reservoir reconstruction technology[J].Journal of Oil and Gas Technology,2009,31(1):334-336.
[7] Kendall P E,Briggs H.The formation of rock joints and the cleat of coal[J].Proc R.Soc.Edinburgh,1933(53):164-187.
[8] Admakin L A.State factors of organic system and petrogenesis of coal[J].Coke & Chemistry,2010,53(8):281-289.
[9] 张素新,肖红艳.煤储层中微孔隙和微裂隙的扫描电镜研究[J].电子显微学报,2000,19(4):531-532.Zhang Suxin,Xiao Hongyan.Scanning electron microscopy study of micro-voids and micro-cracks in coal reservoirs[J].Journal of Chinese Electron Microscopy Society,2000,19(4):531-532.
[10] 孙月龙,崔洪庆,关金锋.基于图像识别的煤层井下宏观裂隙观测[J].煤田地质与勘探,2017,45(5):23-26.Sun Yuelong,Cui Hongqing,Guan Jinfeng.Image recognition-based observation of macro-fracture in coal seam in underground mine[J].Coal Geology & Exploration,2017,45(5):23-26.
[11] 王恩元,何学秋.煤层孔隙裂隙系统的分形描述及其应用[J].阜新矿业学院学报(自然科学版),1996,15(4):407-410.Wang Enyuan,He Xueqiu.Fractal description and application of coal seam pore fracture system[J].Journal of Fuxin Mining Institute(Natural Science),1996,15(4):407-410.
[12] 贾小宝,牛海萍,刘鸿福,等.基于微焦点显微CT技术的不同煤体结构煤的孔裂隙定量表征[J].煤矿安全,2018,49(11):32-36.Jia Xiaobao,Niu Haiping,Liu Hongfu,et al.Quantitative characterization of pore fissures for different coal structures based on CT[J].Safety in Coal Mines,2018,49(11):32-36.
[13] 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 of coal from north China[J].Coal Engineering,2014,46(6):118-120.
[14] 霍永忠,张爱云.煤层气储层的显微孔裂隙成因分类及其应用[J].煤田地质与勘探,1998(6):28-32.Huo Yongzhong,Zhang Aiyun.Classification of microporous fissures in coalbed methane reservoirs and their applications[J].Coal Geology & Exploration,1998(6):28-32.
[15] 刘会虎,桑树勋,薛俊华,等.沁南东古城区块3号煤储层显微孔裂隙特征及其成因[J].煤炭技术,2018,37(12):86-88.Liu Huihu,Sang Shuxun,Xue Junhua,et al.Micro-cavity fracture characteristics and its genesis of block No.3 coal reservoir in Gucheng blocks,Southern Surabaya Basin[J].Coal Technology,2018,37(12):86-88.
[16] 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.
[17] 程庆迎,黄炳香,李增华.煤岩体孔隙裂隙实验方法研究进展[J].中国矿业,2012,21(1):115-118.Cheng Qingying,Huang Bingxiang,Li Zenghua.Research progress in coal or rock pore and fractures[J].China Mining Magazine,2012,21(1):115-118.
[18] 郝琦.煤的显微孔隙形态特征及其成因探讨[J].煤炭学报,1987(4):51-61.Hao Qi.Microscopic porosity morphology of coal and its causes[J].Journal of China Coal Society,1987(4):51-61.
[19] 张慧.煤孔隙的成因类型及其研究[J].煤炭学报,2001,26(1):40-44.Zhang Hui.Genetic types of coal pores and their research[J].Journal of China Coal Society,2001,26(1):40-44.
[20] 刘才华,陈从新,付少兰.剪应力作用下岩体裂隙渗流特性研究[J].岩石力学与工程学报,2003,22(10):1651-1656.Liu Caihua,Chen Congxin,Fu Shaolan.Study on seepage characteristics of a single rock fracture under shear stresses[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(10):1651-1656.
[21] 曾联波,漆家福,王成刚,等.构造应力对裂缝形成与流体流动的影响[J].地学前缘,2008,15(3):292-298.Zeng Lianbo,Qi Jiafu,Wang Chenggang,et al.Influence of tectonic stress on fracture formation and fluid flow[J].Earth Science Frontiers,2008,15(3):292-298.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |