液态CO_2相变致裂影响有效抽采半径试验研究
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摘要
为掌握液态CO_2相变致裂对有效抽采半径的影响规律,在确定有效抽采半径评价指标的基础上,采用分组试验方法对CO_2相变致裂前后的有效抽采半径进行了测定,得出了液态CO_2相变致裂对有效抽采半径的影响参数。研究结果表明:采用液态CO_2相变致裂技术对煤层进行爆破致裂后,瓦斯运移速率提高,使煤层瓦斯压力加速下降,在相同的抽采时间下,CO_2致裂后煤层的有效抽采半径较未致裂的煤层扩大约1 m。达到相同有效抽采半径1、2、3 m,CO_2致裂后的煤层所需预抽时间较未致裂的煤层分别缩短了15、29、47 d,瓦斯抽采效率平均提高43%。CO_2致裂前期对瓦斯抽采效率的提高作用明显,随着抽采时间的延长,致裂增透作用不断减弱直至消失,即CO_2相变致裂对提高煤层透气性存在一个极限影响范围。
This paper presents the results of an experimental study of effect of liquid CO_2 phase change fracturing on effective gas extraction radius. The effective gas extraction radius before and after CO_2 phase change fracturing was measured during the experiment to evaluate its effect. The results show that the gas migration rate increases,resulting in an accelerating reducing of gas pressure in the coal seam,after the application of liquid CO_2 phase transition fracturing. The effective gas extraction radius after CO_2 phase change fracturing increases by about 1 m under the same extraction time. The estimated extraction time after CO_2 phase change fracturing is reduced by 15,29 and 47 days when the effective extraction radius is 1,2 and 3 m respectively,and the average gas extraction rate increases by 43%. The results also show that the gas extraction rate increases dramatically at the beginning of CO_2 phase change fracturing,following by a decelerating increase,and then remaining stable eventually as the coal permeability increase caused by CO_2 phase change fracturing reaches the maximum value.
This paper presents the results of an experimental study of effect of liquid CO_2 phase change fracturing on effective gas extraction radius. The effective gas extraction radius before and after CO_2 phase change fracturing was measured during the experiment to evaluate its effect. The results show that the gas migration rate increases,resulting in an accelerating reducing of gas pressure in the coal seam,after the application of liquid CO_2 phase transition fracturing. The effective gas extraction radius after CO_2 phase change fracturing increases by about 1 m under the same extraction time. The estimated extraction time after CO_2 phase change fracturing is reduced by 15,29 and 47 days when the effective extraction radius is 1,2 and 3 m respectively,and the average gas extraction rate increases by 43%. The results also show that the gas extraction rate increases dramatically at the beginning of CO_2 phase change fracturing,following by a decelerating increase,and then remaining stable eventually as the coal permeability increase caused by CO_2 phase change fracturing reaches the maximum value.
引文
[1]申宝宏,刘建中,张泓.我国煤矿瓦斯治理的技术对策[J].煤炭学报,2007,32(7):673-679.SHEN Baohong,LIU Jianzhong,ZHANG Hong.The technical measures of gas control in China coal mines[J]. Journal of China Coal Society,2007,32(7):673-679.
[2]杜泽生,罗海珠.煤矿瓦斯有效抽放半径的测定计算方法[J].煤炭科学技术,2009,37(2):59-62.DU Zesheng,LUO Haizhu. Measuring and calculation method of borehole effective gas drainage radius[J]. Coal Science and Technology,2009,37(2):59-62.
[3]刘三钧,马耕,卢杰,等.基于瓦斯含量的相对压力测定有效半径技术[J].煤炭学报,2011,36(10):1715-1719.LIU Sanjun, MA Geng, LU Jie, et al. Relative pressure determination technology for effective radius found on gas content[J].Journal of China Coal Society,2011,36(10):1715-1719.
[4]梁卫国,张倍宁,韩俊杰,等.超临界CO2驱替煤层CH4装置及试验研究[J].煤炭学报,2014,39(8):1511-1520.LIANG Weiguo,ZHANG Beining,HAN Junjie,et al. Experimental study on coal bed methane displacement and recovery by super critical carbon dioxide injection[J].Journal of China Coal Society,2014,39(8):1511-1520.
[5]霍中刚.二氧化碳致裂器深孔预裂爆破煤层增透新技术[J].煤炭科学技术,2015,43(2):80-83.HUO Zhonggang. New technology of carbon dioxide fracturer applied to deep borehole pre-cracking blasting for seam permeability improvement[J]. Coal Science and Technology,2015,43(2):80-83.
[6]王海东.突出煤层掘进工作面CO2可控相变致裂防突技术[J].煤炭科学技术,2016,44(3):70-74.WANG Haidong. CO2controllable phase transition fracturing and outburst prevention technology of gateway driving face in outburst seam[J].Coal Science and Technology,2016,44(3):70-74.
[7]王兆丰,孙小明,陆庭侃,等.液态CO2相变致裂强化瓦斯预抽试验研究[J].河南理工大学学报:自然科学版,2015,34(1):1-5.WANG Zhaofeng,SUN Xiaoming,LU Tingkan,et al.Experiment research on strengthening gas drainage effect with fracturing technique by liquid CO2phase transition[J].Journal of Henan Polytechnic University:Natural Science,2015,34(1):1-5.
[8]周西华,门金龙,宋东平,等.煤层液态CO2爆破增透促抽瓦斯技术研究[J].中国安全科学学报,2015,25(2):60-65.ZHOU Xihua,MEN Jinlong,SONG Dongping,et al.Research on increasing coal seam permeability and promoting gas drainage with liquid CO2blasting[J]. China Safety Science Journal,2015,25(2):60-65.
[9] DU Yukun,WANG Ruihe,NI Hongjian,et al. Determination of rock-breaking performance of high-pressure supercritical Carbon dioxide jet[J].Journal of Hydrodynamics,2012,24(4):554-560.
[10]董庆祥,王兆丰,韩亚北,等.液态CO2相变致裂的TNT当量研究[J].中国安全科学学报,2014,24(11):84-88.DONG Qingxiang,WANG Zhaofeng,HAN Yabei,et al. Research on TNT equivalent of liquid CO2phase-transition fracturing[J].China Safety Science Journal,2014,24(11):84-88.
[11]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1997.
[12]梁冰,袁欣鹏,孙维吉,等.分组测压确定瓦斯有效抽采半径试验研究[J].采矿与安全工程学报,2013,30(1):132-135.LANG Bing,YUAN Xinpeng,SUN Weiji,et al. Grouped pressure test to determine effective gas drainage radius[J].Journal of Mining&Safety Engineering,2013,30(1):132-135.
[13]舒龙勇,樊少武,张浪,等.基于临界残余瓦斯压力的有效抽采半径确定方法[J].煤炭科学技术,2015,43(10):81-85.SHU Longyong,FAN Shaowu,ZHANG Lang,et al. Method to determine effective gas drainage radius based on critical residual gas pressure[J]. Coal Science and Technology,2015,43(10):81-85.
[14]余陶,卢平,孙金华,等.基于钻孔瓦斯流量和压力测定有效抽采半径[J].采矿与安全工程学报,2012,29(4):596-600.YU Tao,LU Ping,SUN Jinhua,et al. Measurement of effective drainage fadius based on gas flow and pressure of boreholes[J].Journal of Mining&Safety Engineering,2012,29(4):596-600.
[15]陈金玉,马丕梁,孔一凡,等.SF6气体示踪法测定钻孔瓦斯抽放有效半径[J].煤矿安全,2008,40(9):23-25.CHEN Jinyu,MA Piliang,KONG Yifan,et al. SF6gas tracer method for the determination of effective gas drainage radius[J].Safety in Coal Mines,2008,40(9):23-25.
[16]王兆丰,周少华,李志强.瓦斯抽采钻孔有效抽采半径的数值计算方法[J].煤炭工程,2011(6):82-84.WANG Zhaofeng,ZHOU Shaohua,LI Zhiqiang. Numerical calculation method of effective drainage radius for gas drainage borehole[J].Coal Engineering,2011(6):82-84.
[17]郝富昌,刘明举,孙丽娟.基于多物理场耦合的瓦斯抽放半径确定方法[J].煤炭学报,2013,38(S1):106-111.HAO Fuchang,LIU Mingju,SUN Lijuan.Determination method of gas drainage radius based on multi-physics coupling[J]. Journal of China Coal Society,2013,38(S1):106-111.
[18]鲁义,申宏敏,秦波涛,等.顺层钻孔瓦斯抽采半径及布孔间距研究[J].采矿与安全工程学报,2015,32(1):156-162.LU Yi,SHEN Hongmin,QIN Botao,et al.Gas drainage radius and borehole distance along seam[J].Journal of Mining&Safety Engineering,2015,32(1):156-162.
[19]马耕,苏现波,魏庆喜.基于瓦斯流态的抽放半径确定方法[J].煤炭学报,2009,34(4):501-504.MA Geng,SU Xianbo,WEI Qingxi. The determination method of coal gas drainage radius based on methane flow state[J]. Journal of China Coal Society,2009,34(4):501-504.
[20]季淮君,李增华,杨永良,等.基于瓦斯流场的抽采半径确定方法[J].采矿与安全工程学报,2013,30(6):917-921.JI Huaijun,LI Zenghua,YANG Yongliang,et al. Drainage radius measurement based on gas flow field[J]. Journal of Mining&Safety Engineering,2013,30(6):917-921.
[2]杜泽生,罗海珠.煤矿瓦斯有效抽放半径的测定计算方法[J].煤炭科学技术,2009,37(2):59-62.DU Zesheng,LUO Haizhu. Measuring and calculation method of borehole effective gas drainage radius[J]. Coal Science and Technology,2009,37(2):59-62.
[3]刘三钧,马耕,卢杰,等.基于瓦斯含量的相对压力测定有效半径技术[J].煤炭学报,2011,36(10):1715-1719.LIU Sanjun, MA Geng, LU Jie, et al. Relative pressure determination technology for effective radius found on gas content[J].Journal of China Coal Society,2011,36(10):1715-1719.
[4]梁卫国,张倍宁,韩俊杰,等.超临界CO2驱替煤层CH4装置及试验研究[J].煤炭学报,2014,39(8):1511-1520.LIANG Weiguo,ZHANG Beining,HAN Junjie,et al. Experimental study on coal bed methane displacement and recovery by super critical carbon dioxide injection[J].Journal of China Coal Society,2014,39(8):1511-1520.
[5]霍中刚.二氧化碳致裂器深孔预裂爆破煤层增透新技术[J].煤炭科学技术,2015,43(2):80-83.HUO Zhonggang. New technology of carbon dioxide fracturer applied to deep borehole pre-cracking blasting for seam permeability improvement[J]. Coal Science and Technology,2015,43(2):80-83.
[6]王海东.突出煤层掘进工作面CO2可控相变致裂防突技术[J].煤炭科学技术,2016,44(3):70-74.WANG Haidong. CO2controllable phase transition fracturing and outburst prevention technology of gateway driving face in outburst seam[J].Coal Science and Technology,2016,44(3):70-74.
[7]王兆丰,孙小明,陆庭侃,等.液态CO2相变致裂强化瓦斯预抽试验研究[J].河南理工大学学报:自然科学版,2015,34(1):1-5.WANG Zhaofeng,SUN Xiaoming,LU Tingkan,et al.Experiment research on strengthening gas drainage effect with fracturing technique by liquid CO2phase transition[J].Journal of Henan Polytechnic University:Natural Science,2015,34(1):1-5.
[8]周西华,门金龙,宋东平,等.煤层液态CO2爆破增透促抽瓦斯技术研究[J].中国安全科学学报,2015,25(2):60-65.ZHOU Xihua,MEN Jinlong,SONG Dongping,et al.Research on increasing coal seam permeability and promoting gas drainage with liquid CO2blasting[J]. China Safety Science Journal,2015,25(2):60-65.
[9] DU Yukun,WANG Ruihe,NI Hongjian,et al. Determination of rock-breaking performance of high-pressure supercritical Carbon dioxide jet[J].Journal of Hydrodynamics,2012,24(4):554-560.
[10]董庆祥,王兆丰,韩亚北,等.液态CO2相变致裂的TNT当量研究[J].中国安全科学学报,2014,24(11):84-88.DONG Qingxiang,WANG Zhaofeng,HAN Yabei,et al. Research on TNT equivalent of liquid CO2phase-transition fracturing[J].China Safety Science Journal,2014,24(11):84-88.
[11]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1997.
[12]梁冰,袁欣鹏,孙维吉,等.分组测压确定瓦斯有效抽采半径试验研究[J].采矿与安全工程学报,2013,30(1):132-135.LANG Bing,YUAN Xinpeng,SUN Weiji,et al. Grouped pressure test to determine effective gas drainage radius[J].Journal of Mining&Safety Engineering,2013,30(1):132-135.
[13]舒龙勇,樊少武,张浪,等.基于临界残余瓦斯压力的有效抽采半径确定方法[J].煤炭科学技术,2015,43(10):81-85.SHU Longyong,FAN Shaowu,ZHANG Lang,et al. Method to determine effective gas drainage radius based on critical residual gas pressure[J]. Coal Science and Technology,2015,43(10):81-85.
[14]余陶,卢平,孙金华,等.基于钻孔瓦斯流量和压力测定有效抽采半径[J].采矿与安全工程学报,2012,29(4):596-600.YU Tao,LU Ping,SUN Jinhua,et al. Measurement of effective drainage fadius based on gas flow and pressure of boreholes[J].Journal of Mining&Safety Engineering,2012,29(4):596-600.
[15]陈金玉,马丕梁,孔一凡,等.SF6气体示踪法测定钻孔瓦斯抽放有效半径[J].煤矿安全,2008,40(9):23-25.CHEN Jinyu,MA Piliang,KONG Yifan,et al. SF6gas tracer method for the determination of effective gas drainage radius[J].Safety in Coal Mines,2008,40(9):23-25.
[16]王兆丰,周少华,李志强.瓦斯抽采钻孔有效抽采半径的数值计算方法[J].煤炭工程,2011(6):82-84.WANG Zhaofeng,ZHOU Shaohua,LI Zhiqiang. Numerical calculation method of effective drainage radius for gas drainage borehole[J].Coal Engineering,2011(6):82-84.
[17]郝富昌,刘明举,孙丽娟.基于多物理场耦合的瓦斯抽放半径确定方法[J].煤炭学报,2013,38(S1):106-111.HAO Fuchang,LIU Mingju,SUN Lijuan.Determination method of gas drainage radius based on multi-physics coupling[J]. Journal of China Coal Society,2013,38(S1):106-111.
[18]鲁义,申宏敏,秦波涛,等.顺层钻孔瓦斯抽采半径及布孔间距研究[J].采矿与安全工程学报,2015,32(1):156-162.LU Yi,SHEN Hongmin,QIN Botao,et al.Gas drainage radius and borehole distance along seam[J].Journal of Mining&Safety Engineering,2015,32(1):156-162.
[19]马耕,苏现波,魏庆喜.基于瓦斯流态的抽放半径确定方法[J].煤炭学报,2009,34(4):501-504.MA Geng,SU Xianbo,WEI Qingxi. The determination method of coal gas drainage radius based on methane flow state[J]. Journal of China Coal Society,2009,34(4):501-504.
[20]季淮君,李增华,杨永良,等.基于瓦斯流场的抽采半径确定方法[J].采矿与安全工程学报,2013,30(6):917-921.JI Huaijun,LI Zenghua,YANG Yongliang,et al. Drainage radius measurement based on gas flow field[J]. Journal of Mining&Safety Engineering,2013,30(6):917-921.
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