构造煤渗透率对温度变化响应规律的试验研究
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摘要
针对含瓦斯构造煤渗透率与温度变化关系,利用自主研发的含瓦斯煤岩热-流-固耦合三轴渗流试验装置,开展不同应力条件下含瓦斯构造煤原煤样的渗透率与温度变化的试验研究。试验结果表明:(1)在试验温度变化过程中,构造煤样渗透率随温度升高而降低,渗透率与温度变化呈现负指数函数分布规律;(2)在试验温度变化过程中,构造煤渗透率损失率与有效应力符合Boltzmann分布,渗透率损失率存在有效应力门槛值大约为4.515 MPa。渗透率变化主要分为渗透率加速变化与平稳变化两个阶段,构造煤样渗透率从加速阶段过渡到平稳变化温度大约为45℃;(3)在温度21~80℃范围内,渗透率敏感性系数数量级为10~(-2),温度变化对构造煤样渗透率影响不显著。同时,有效应力的增加使得温度敏感性系数降低。
To investigate the relationship between the permeability and temperature of tectonic coal containing gas, a series of tests on tectonic coal samples containing gas is carried out at different stress conditions using a self-developed triaxial hot-fluid-solid coupling seepage testing device. Experimental results show that the permeability of tectonic coal samples decreases with the increase of temperature, and there is a negative exponential function relation between permeability and temperature. Moreover, the relationship between the permeability loss rate and the effective stress follows the Boltzmann distribution with the variation of experimental temperature. There exists an effective stress threshold of approximately 4.515 MPa for the permeability loss rate. There are two stages identified in permeability change of tectonic coal, i.e. the accelerating stage and the smooth stage, and the transition temperature from the accelerating phase to smooth phase is about 45 ℃. Within the range of 21-80 ℃, the sensitivity order of the permeability coefficient is 10~(-2), which means the effect of temperature on permeability of tectonic coal sample is not obvious. At the same time, the increase of effective stress results in the decrease of the temperature sensitivity coefficient.
To investigate the relationship between the permeability and temperature of tectonic coal containing gas, a series of tests on tectonic coal samples containing gas is carried out at different stress conditions using a self-developed triaxial hot-fluid-solid coupling seepage testing device. Experimental results show that the permeability of tectonic coal samples decreases with the increase of temperature, and there is a negative exponential function relation between permeability and temperature. Moreover, the relationship between the permeability loss rate and the effective stress follows the Boltzmann distribution with the variation of experimental temperature. There exists an effective stress threshold of approximately 4.515 MPa for the permeability loss rate. There are two stages identified in permeability change of tectonic coal, i.e. the accelerating stage and the smooth stage, and the transition temperature from the accelerating phase to smooth phase is about 45 ℃. Within the range of 21-80 ℃, the sensitivity order of the permeability coefficient is 10~(-2), which means the effect of temperature on permeability of tectonic coal sample is not obvious. At the same time, the increase of effective stress results in the decrease of the temperature sensitivity coefficient.
引文
[1]SOMERTON W H,GUPTA V S.Role of fluxing agents in themal alteration of sandstones[J].Journal of Petroleum Technology,1965,35(4):585-588.
[2]MORROW C.Permeability of granite in a temperature gradient[J].Journal of Geophysical Research,1981,86(B4):3002-3008.
[3]李志强,鲜学福.煤体渗透率随温度和应力变化的实验研究[J].辽宁工程技术大学学报(自然科学版),2009,28(增刊):156-159.LI Zhi-qiang,XIAN Xue-fu.Study on experiment of coal permeability with temperature and stress changing[J].Journal of Liaoning Technical University(Natural Science),2009,28(Supp.):156-159.
[4]李志强,鲜学福,隆晴明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报,2009,38(4):523-527.LI Zhi-qiang,XIAN Xue-fu,LONG Qing-ming.Experiment study of coal permeability under different temperatures and stresses[J].Journal of China University of Mining&Technology,2009,38(4):523-527.
[5]杨建平,陈卫忠,田洪铭,等.应力-温度对低渗透介质渗透率影响研究[J].岩土力学,2009,30(12):3587-3594.YANG Jian-ping,CHEN Wei-zhong,TIAN Hong-ming,et al.Study of permeability evolutions in low permeability media under different stresses and temperatures[J].Rock and Soil Mechanics,2009,30(12):3587-3594.
[6]冯子军,万志军,赵阳升,等.高温三轴应力下无烟煤、气煤煤体渗透特性的试验研究[J].岩石力学与工程学报,2010,29(4):689-696.HONG Zi-jun,WAN Zhi-jun,ZHAO Yang-sheng,et al.Experimental study of permeability of anthracite and gas coal masses under high temperature and triaxial stress[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(4):689-696.
[7]胡耀青,赵阳升,杨栋,等.温度对褐煤渗透特性影响的试验研究[J].岩石力学与工程学报,2010,29(8):1585-1590.HU Yao-qing,ZHAO Yang-sheng,YANG Dong,et al.Experimental study of effect of temperature on permeability characteristics of lignite[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(8):1585-1590.
[8]冯子军,赵阳升,万志军,等.热力耦合作用下无烟煤变形过程中渗透特性[J].煤炭学报,2010,35(增刊):86-90.HONG Zi-jun,ZHAO Yang-sheng,WANG Zhi-jun,et al.Law of permeability in the process of anthracite deformation with thermo-mechanical coupling[J].Journal of China Coal Society,2010,35(Supp.):86-90.
[9]杨新乐,张永利.气固耦合作用下温度对煤瓦斯渗透率影响规律的实验研究[J].地质力学学报,2008,14(4):374-380.YANG Xin-le,ZHANG Yong-li.Experimental study of effect of temperature on coal gas permeability under gas-solid coupling[J].Journal of Geomechanics,2008,14(4):374-380.
[10]杨新乐,张永利,李成全,等.考虑温度影响下煤层气解吸渗流规律试验研究[J].岩土工程学报,2008,30(12):1811-1814.YANG Xin-le,ZHANG Yong-li,LI Cheng-quan,et al.Experimental study on desorption and seepage rules of coal-bed gas considering temperature conditions[J].Chinese Journal of Geotechnical Engineering,2008,30(12):1811-1814.
[11]陈术源,秦勇,申建,等.高阶煤渗透率温度应力敏感性试验研究[J].煤炭学报,2014,39(9):1845-1851.CHEN Shu-yuan,QING Yong,SHEN Jian,et al.Temperature-stress sensitivity of high-rank coal permeability[J].Journal of China Coal Society,2014,39(9):1845-1851.
[12]姜永东,阳兴洋,鲜学福,等.应力场、温度场、声场作用下煤层气的渗流方程[J].煤炭学报,2010,35(3):434-438.JIANG Yong-dong,YANG Xing-yang,XIAN Xue-fu,et al.The infiltration equation of coal bed under the cooperation of stress field,temperature field and sound field[J].Journal of China Coal Society,2010,35(3):434-438.
[13]姜永东,鲜学福,刘保县,等.地应力、地温、声场中的煤层瓦斯渗流方程[J].西安石油大学(自然科学版),2007,22(增刊):141-144.JIANG Yong-dong,XIAN Xue-fu,LIU Bao-xian,et al.Geostress,geotemperature and acoustic field in the coal seams gas seepage equation[J].Journal of Xi’an Shiyou University(Nature Science Edition),2007,22(Supp.):141-144.
[14]于永江,张华,张春会,等.温度及应力对成型煤样渗透性的影响[J].煤炭学报,2013,38(6):936-941.YU Yong-jiang,ZHANG Hua,ZHANG Chun-hui,et al.Effects of temperature and stress on permeability of Standard coal briquette specimen[J].Journal of China Coal Society,2013,38(6):936-941.
[15]贺玉龙,杨立中.温度和有效应力对砂岩渗透率的影响机理研究[J].岩石力学与工程学报,2005,24(14):2420-2427.HE Yu-long,YANG Li-zhong.Mechanism of effects of temperature and effective stress on permeability of sandstone[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2420-2427.
[16]贺玉龙,杨立中.温度和有效应力对砂岩渗透性影响的试验研究[J].煤田地质与勘探,2004,32(2):36-38.YANG Yu-zhong,YANG Li-zhong.Testing study concerning the effect of temperature and effective stress on permeability of sandstone[J].Coal Geology&Exploration,2004,32(2):36-38.
[17]刘向君,高涵,梁利喜.温度围压对低渗透砂岩孔隙度和渗透率的影响研究[J].岩石力学与工程学报,2011,30(增刊2):3771-3778.LIU Xiang-jun,GAO Han,LIANG Li-xi.Study of temperature and confining pressure effects on porosity and permeability in low permeability sandstone[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(Supp.2):3771-3778.
[18]郭肖,杜志敏,姜贻伟,等.温度和压力对气水相对渗透率的影响[J].天然气工业,2014,30(6):60-64.GUO Xiao,DU Zhi-min,JIANG Yi-wei,et al.Temperature and pressure effects on gas-water relative permeability[J].Natural Gas Industry,2014,34(6):60-64.
[19]王进,姜生玲,常健,等.温度、压力对致密砂岩渗透率影响的实验研究[J].内蒙古石油化工,2008,7:76-78.WANG Jin,JIANG Sheng-ling,CHANG Jian,et al.Experimental study on Influences of Temperature and Pressure on permeability of tight sandstone[J].Inner Mongolia Petrochemical Industry,2008,7:76-78.
[20]刘均荣,秦积舜,吴晓东.温度对岩石渗透率影响的实验研究[J].石油大学学报(自然科学版),2001,25(4):51-53.LIU Jun-rong,QIN Ji-shun,WU Xiao-dong,et al.Experimental study on relation between temperature and rock permeability[J].Journal of the University of Petroleum,2001,25(4):51-53.
[21]张渊,赵阳升,万志军,等.不同温度条件下孔隙压力对长石细砂岩渗透率影响试验研究[J].岩石力学与工程学报,2008,27(7):53-58.ZHANG Yuan,ZHAO Yang-sheng,WAN Zhi-jun,et al.Experimental study on effect of pore pressure on feldspar fine sandstone permeability under different temperatures[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(7):53-58.
[22]张渊,万志军,康建荣,等.温度、三轴应力条件下砂岩渗透率阶段特征分析[J].岩土力学,2011,32(4):677-683.ZHANG Yuan,WAN Zhi-jun,KANG Jian-rong,et al.Analysis of stage characteristics of sandstone permeability under conditions of temperature and triaxial stress[J].Rock and Soil Mechanics,2011,32(4):677-683.
[23]梁冰,高红梅,兰永伟.岩石渗透率与温度关系的理论分析和试验研究[J].岩石力学与工程学报,2005,24(12):2009-2012.LIANG Bing,GAO Hong-mei,LAN Yong-wei.Theoretical analysis and experimental study on relation between rock permeability and temperature[J].Chinese Journal of Rock Mechanics and Engineering,2001,24(12):2009-2012.
[24]CAO Y,HOU Q L,ZHNAG Y G,et al.Some basic problems on ductile shear zones along coal seams within shallow and superficial teetonic layers[C]//Progress in Geology of China(1993-1996)—Papers to 30th IGC.Beijing:Geology Society of China,1996,8:355-358.
[25]田坤云,张瑞林.高压水及负压加载状态下三轴应力渗流试验装置的研制[J].岩土力学,2014,35(11):3338-3343.TIAN Kun-yun,ZHANG Rui-lin.Research on triaxial stress seepage experiment device loaded by high pressure water and negative pressure[J].Rock and Soil Mechanics,2014,35(11):3338-3343.
[26]尹光志,蒋长宝,王维忠,等.不同卸围压速度对含瓦斯煤岩力学和瓦斯渗流特性影响试验研究[J].岩石力学与工程学报,2011,30(1):68-77.YIN Guang-zhi,JIANG Chang-bao,WANG Wei-zhong,et al.Experimental study of influence of confining pressure unloading speeding on mechanical properties and gas permeability of containing-gas coal rock[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(1):68-77.
[27]许江,曹偈,李波波,等.煤岩渗透率对孔隙压力变化响应规律的试验研究[J].岩石力学与工程学报,2013,32(2):225-230.XU Jiang,CAO Jie,LI Bo-bo,et al.Experimental research on response law of permeability of coal to pore pressure[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):225-230.
[28]许江,彭守建,陶云奇,等.蠕变对含瓦斯煤渗透率影响的试验分析[J].岩石力学与工程学报,2009,28(11):2273-2279.XU Jiang,PENG Shou-jian,TAO Yun-qi,et al.Experimental analysis of influence of creep on permeability of gas-bearing coal[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(11):2273-2279.
[2]MORROW C.Permeability of granite in a temperature gradient[J].Journal of Geophysical Research,1981,86(B4):3002-3008.
[3]李志强,鲜学福.煤体渗透率随温度和应力变化的实验研究[J].辽宁工程技术大学学报(自然科学版),2009,28(增刊):156-159.LI Zhi-qiang,XIAN Xue-fu.Study on experiment of coal permeability with temperature and stress changing[J].Journal of Liaoning Technical University(Natural Science),2009,28(Supp.):156-159.
[4]李志强,鲜学福,隆晴明.不同温度应力条件下煤体渗透率实验研究[J].中国矿业大学学报,2009,38(4):523-527.LI Zhi-qiang,XIAN Xue-fu,LONG Qing-ming.Experiment study of coal permeability under different temperatures and stresses[J].Journal of China University of Mining&Technology,2009,38(4):523-527.
[5]杨建平,陈卫忠,田洪铭,等.应力-温度对低渗透介质渗透率影响研究[J].岩土力学,2009,30(12):3587-3594.YANG Jian-ping,CHEN Wei-zhong,TIAN Hong-ming,et al.Study of permeability evolutions in low permeability media under different stresses and temperatures[J].Rock and Soil Mechanics,2009,30(12):3587-3594.
[6]冯子军,万志军,赵阳升,等.高温三轴应力下无烟煤、气煤煤体渗透特性的试验研究[J].岩石力学与工程学报,2010,29(4):689-696.HONG Zi-jun,WAN Zhi-jun,ZHAO Yang-sheng,et al.Experimental study of permeability of anthracite and gas coal masses under high temperature and triaxial stress[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(4):689-696.
[7]胡耀青,赵阳升,杨栋,等.温度对褐煤渗透特性影响的试验研究[J].岩石力学与工程学报,2010,29(8):1585-1590.HU Yao-qing,ZHAO Yang-sheng,YANG Dong,et al.Experimental study of effect of temperature on permeability characteristics of lignite[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(8):1585-1590.
[8]冯子军,赵阳升,万志军,等.热力耦合作用下无烟煤变形过程中渗透特性[J].煤炭学报,2010,35(增刊):86-90.HONG Zi-jun,ZHAO Yang-sheng,WANG Zhi-jun,et al.Law of permeability in the process of anthracite deformation with thermo-mechanical coupling[J].Journal of China Coal Society,2010,35(Supp.):86-90.
[9]杨新乐,张永利.气固耦合作用下温度对煤瓦斯渗透率影响规律的实验研究[J].地质力学学报,2008,14(4):374-380.YANG Xin-le,ZHANG Yong-li.Experimental study of effect of temperature on coal gas permeability under gas-solid coupling[J].Journal of Geomechanics,2008,14(4):374-380.
[10]杨新乐,张永利,李成全,等.考虑温度影响下煤层气解吸渗流规律试验研究[J].岩土工程学报,2008,30(12):1811-1814.YANG Xin-le,ZHANG Yong-li,LI Cheng-quan,et al.Experimental study on desorption and seepage rules of coal-bed gas considering temperature conditions[J].Chinese Journal of Geotechnical Engineering,2008,30(12):1811-1814.
[11]陈术源,秦勇,申建,等.高阶煤渗透率温度应力敏感性试验研究[J].煤炭学报,2014,39(9):1845-1851.CHEN Shu-yuan,QING Yong,SHEN Jian,et al.Temperature-stress sensitivity of high-rank coal permeability[J].Journal of China Coal Society,2014,39(9):1845-1851.
[12]姜永东,阳兴洋,鲜学福,等.应力场、温度场、声场作用下煤层气的渗流方程[J].煤炭学报,2010,35(3):434-438.JIANG Yong-dong,YANG Xing-yang,XIAN Xue-fu,et al.The infiltration equation of coal bed under the cooperation of stress field,temperature field and sound field[J].Journal of China Coal Society,2010,35(3):434-438.
[13]姜永东,鲜学福,刘保县,等.地应力、地温、声场中的煤层瓦斯渗流方程[J].西安石油大学(自然科学版),2007,22(增刊):141-144.JIANG Yong-dong,XIAN Xue-fu,LIU Bao-xian,et al.Geostress,geotemperature and acoustic field in the coal seams gas seepage equation[J].Journal of Xi’an Shiyou University(Nature Science Edition),2007,22(Supp.):141-144.
[14]于永江,张华,张春会,等.温度及应力对成型煤样渗透性的影响[J].煤炭学报,2013,38(6):936-941.YU Yong-jiang,ZHANG Hua,ZHANG Chun-hui,et al.Effects of temperature and stress on permeability of Standard coal briquette specimen[J].Journal of China Coal Society,2013,38(6):936-941.
[15]贺玉龙,杨立中.温度和有效应力对砂岩渗透率的影响机理研究[J].岩石力学与工程学报,2005,24(14):2420-2427.HE Yu-long,YANG Li-zhong.Mechanism of effects of temperature and effective stress on permeability of sandstone[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(14):2420-2427.
[16]贺玉龙,杨立中.温度和有效应力对砂岩渗透性影响的试验研究[J].煤田地质与勘探,2004,32(2):36-38.YANG Yu-zhong,YANG Li-zhong.Testing study concerning the effect of temperature and effective stress on permeability of sandstone[J].Coal Geology&Exploration,2004,32(2):36-38.
[17]刘向君,高涵,梁利喜.温度围压对低渗透砂岩孔隙度和渗透率的影响研究[J].岩石力学与工程学报,2011,30(增刊2):3771-3778.LIU Xiang-jun,GAO Han,LIANG Li-xi.Study of temperature and confining pressure effects on porosity and permeability in low permeability sandstone[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(Supp.2):3771-3778.
[18]郭肖,杜志敏,姜贻伟,等.温度和压力对气水相对渗透率的影响[J].天然气工业,2014,30(6):60-64.GUO Xiao,DU Zhi-min,JIANG Yi-wei,et al.Temperature and pressure effects on gas-water relative permeability[J].Natural Gas Industry,2014,34(6):60-64.
[19]王进,姜生玲,常健,等.温度、压力对致密砂岩渗透率影响的实验研究[J].内蒙古石油化工,2008,7:76-78.WANG Jin,JIANG Sheng-ling,CHANG Jian,et al.Experimental study on Influences of Temperature and Pressure on permeability of tight sandstone[J].Inner Mongolia Petrochemical Industry,2008,7:76-78.
[20]刘均荣,秦积舜,吴晓东.温度对岩石渗透率影响的实验研究[J].石油大学学报(自然科学版),2001,25(4):51-53.LIU Jun-rong,QIN Ji-shun,WU Xiao-dong,et al.Experimental study on relation between temperature and rock permeability[J].Journal of the University of Petroleum,2001,25(4):51-53.
[21]张渊,赵阳升,万志军,等.不同温度条件下孔隙压力对长石细砂岩渗透率影响试验研究[J].岩石力学与工程学报,2008,27(7):53-58.ZHANG Yuan,ZHAO Yang-sheng,WAN Zhi-jun,et al.Experimental study on effect of pore pressure on feldspar fine sandstone permeability under different temperatures[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(7):53-58.
[22]张渊,万志军,康建荣,等.温度、三轴应力条件下砂岩渗透率阶段特征分析[J].岩土力学,2011,32(4):677-683.ZHANG Yuan,WAN Zhi-jun,KANG Jian-rong,et al.Analysis of stage characteristics of sandstone permeability under conditions of temperature and triaxial stress[J].Rock and Soil Mechanics,2011,32(4):677-683.
[23]梁冰,高红梅,兰永伟.岩石渗透率与温度关系的理论分析和试验研究[J].岩石力学与工程学报,2005,24(12):2009-2012.LIANG Bing,GAO Hong-mei,LAN Yong-wei.Theoretical analysis and experimental study on relation between rock permeability and temperature[J].Chinese Journal of Rock Mechanics and Engineering,2001,24(12):2009-2012.
[24]CAO Y,HOU Q L,ZHNAG Y G,et al.Some basic problems on ductile shear zones along coal seams within shallow and superficial teetonic layers[C]//Progress in Geology of China(1993-1996)—Papers to 30th IGC.Beijing:Geology Society of China,1996,8:355-358.
[25]田坤云,张瑞林.高压水及负压加载状态下三轴应力渗流试验装置的研制[J].岩土力学,2014,35(11):3338-3343.TIAN Kun-yun,ZHANG Rui-lin.Research on triaxial stress seepage experiment device loaded by high pressure water and negative pressure[J].Rock and Soil Mechanics,2014,35(11):3338-3343.
[26]尹光志,蒋长宝,王维忠,等.不同卸围压速度对含瓦斯煤岩力学和瓦斯渗流特性影响试验研究[J].岩石力学与工程学报,2011,30(1):68-77.YIN Guang-zhi,JIANG Chang-bao,WANG Wei-zhong,et al.Experimental study of influence of confining pressure unloading speeding on mechanical properties and gas permeability of containing-gas coal rock[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(1):68-77.
[27]许江,曹偈,李波波,等.煤岩渗透率对孔隙压力变化响应规律的试验研究[J].岩石力学与工程学报,2013,32(2):225-230.XU Jiang,CAO Jie,LI Bo-bo,et al.Experimental research on response law of permeability of coal to pore pressure[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(2):225-230.
[28]许江,彭守建,陶云奇,等.蠕变对含瓦斯煤渗透率影响的试验分析[J].岩石力学与工程学报,2009,28(11):2273-2279.XU Jiang,PENG Shou-jian,TAO Yun-qi,et al.Experimental analysis of influence of creep on permeability of gas-bearing coal[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(11):2273-2279.