热力耦合条件下超临界CO_2驱替煤层CH_4实验
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摘要
为提高煤层CH_4抽采效率,利用自主研发的实验系统,模拟超临界CO_2在深部煤层中驱替CH_4的过程,开展了不同温度和注入压力条件下原煤试样中超临界CO_2渗流、吸附及驱替CH_4实验。结果表明:在恒定温度条件下,随着超临界CO_2注入压力逐渐增大,煤体渗透率提高,CO_2吸附量增加。超临界CO_2注入压力和温度对驱替效果影响显著。不同温度条件下,当超临界CO_2注入压力从8MPa增至12MPa,CH_4驱替量平均增长了0.076cm~3/g,CH_4驱替效率增加了17%～23%,超临界CO_2置换体积比呈线性递减趋势;相同注入压力条件下,温度每升高10℃,驱替效率平均增加8%,置换体积比平均下降0.5。研究结果为高效抽采煤层CH_4和实现CO_2封存提供理论依据。
Using self-made experimental system, experiments were performed on coal samples to study supercritical CO_2 seepage, adsorption and CH_4 displacement by supercritical CO_2. Experimental results show that permeability and adsorption of supercritical CO_2 in coal increase with CO_2 pressures. Pressures and temperatures of CO_2 influence the values of displaced CH_4. Values of displaced CH_4 increase by average 0.076 cm~3/g and sweep efficiency rises by 17%-23% with the CO_2 pressure increasing from 8 MPa to 12 MPa, while displacement volume decreases linearly. With the temperature rising by 10℃, sweep efficiency increases by 8% while displacement volume declines by 0.5 on average.
Using self-made experimental system, experiments were performed on coal samples to study supercritical CO_2 seepage, adsorption and CH_4 displacement by supercritical CO_2. Experimental results show that permeability and adsorption of supercritical CO_2 in coal increase with CO_2 pressures. Pressures and temperatures of CO_2 influence the values of displaced CH_4. Values of displaced CH_4 increase by average 0.076 cm~3/g and sweep efficiency rises by 17%-23% with the CO_2 pressure increasing from 8 MPa to 12 MPa, while displacement volume decreases linearly. With the temperature rising by 10℃, sweep efficiency increases by 8% while displacement volume declines by 0.5 on average.
引文
[1]王公达,REN Tingxiang,齐庆新,等.吸附解吸迟滞现象机理及其对深部煤层气开发的影响[J].煤炭学报,2016,41(1):49-56.WANG Gongda,REN Tingxiang,QI Qingxin,et al.Mechanism of adsorption-desorption hysteresis and its influence on deep CBM recovery[J].Journal of China Coal Society,2016,41(1):49-56.
[2]梁冰,孙可明.低渗透煤层气开采理论及其应用[M].北京:科学出版社,2006.
[3]REUCROFT P J,PATEL H.Gas-induced swelling in coal[J].Fuel,1986,65(6):816-820.
[4]REUCROFT P J,SETHURAMAN A R.Effect of pressure on carbon dioxide induced coal swelling[J].Energy&Fuel,1987,1(1):72-75.
[5]吴世跃,赵文.含吸附煤层气煤的有效应力分析[J].岩石力学与工程学报,2005,24(10):1674-1678.WU Shiyue,ZHAO Wen.Analysis of effective stress in adsorbed methane-coal system[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(10):1674-1678.
[6]刘世奇,王恬,杜艺,等.超临界CO2对烟煤和无烟煤化学结构的影响[J].煤田地质与勘探,2018,46(5):19-25.LIU Shiqi,WANG Tian,DU Yi,et al.The effects of supercritical CO2 on the chemical structure of bituminous coal and anthracite[J].Coal Geology&Exploration,2018,46(5):19-25.
[7]桑树勋.二氧化碳地质存储与煤层气强化开发有效性研究述评[J].煤田地质与勘探,2018,46(5):1-9.SANG Shuxun.Research review on technical effectiveness of CO2 geological storage and enhanced coalbed methane recovery[J].Coal Geology&Exploration,2018,46(5):1-9.
[8]SIEMONS N,BUSCH A.Measurement and interpretation of supercritical CO2 sorption on various coals[J].International Journal of Coal Geology,2007,69(4):229-242.
[9]HOL S,PEACH C J,SPIERS C J.A new experimental method to determine the CO2 sorption capacity of coal[J].Energy Procedia,2011,4:3125-3130.
[10]GENSTERBLUM Y,MERKEL A,BUSCH A,et al.High-pressure CH4 and CO2 sorption isotherms as a function of coal maturity and the influence of moisture[J].International Journal of Coal Geology,2013,118:45-57.
[11]WU D,LIU X,LIANG B,et al.Experiments on displacing methane in coal by injecting supercritical carbon dioxide[J].Energy&Fuels,2018,32(12):12766-12771.
[12]刘会虎,吴海燕,徐宏杰,等.沁水盆地南部深部煤层超临界CO2吸附特征及其控制因素[J].煤田地质与勘探,2018,46(5):37-42.LIU Huihu,WU Haiyan,XU Hongjie,et al.Supercritical CO2adsorption characteristics and their control factors in deep-seated coal seams in southern Qinshui basin[J].Coal Geology&Exploration,2018,46(5):37-42.
[13]KUTCHKO B G,GOODMAN A L,ROSENBAUM E,et al.Characterization of coal before and after supercritical CO2 exposure via feature relocation using field-emission scanning electron microscopy[J].Fuel,2013,107:777-786.
[14]刘长江,张琨,宋璠.CO2地质埋藏深度对高阶煤孔隙结构的影响[J].煤田地质与勘探,2018,46(5):32-36.LIU Changjiang,ZHANG Kun,SONG Fan.Influences of burial depth on pore structure of high-rank coal during the CO2 storage process[J].Coal Geology&Exploration,2018,46(5):32-36.
[15]ZHANG Y,LEBEDEV M,SARMADIVALEH M,et al.Swelling-induced changes in coal microstructure due to supercritical CO2 injection[J].Geophysical Research Letters,2016,43(17):9077-9083.
[16]PERERA M S A,RANJITH P G,VIETE D R.Effects of gaseous and super-critical carbon dioxide saturation on the mechanical properties of bituminous coal from the southern Sydney basin[J].Applied Energy,2013,110:73-81.
[17]RANATHUNGA A S,PERERA M S A,RANJITH P G,et al.Super-critical CO2 saturation-induced mechanical property alterations in low rank coal:An experimental study[J].Journal of Supercritical Fluids,2016,109:134-140.
[18]DUTKA B,KUDASIK M,POKRYSZKA Z,et al.Balance of CO2/CH4 exchange sorption in a coal briquette[J].Fuel Processing Technology,2013,106:95-101.
[19]LEE H H,KIM H J,SHI Y,et al.Competitive adsorption of CO2/CH4 mixture on dry and wet coal from subcritical to supercritical conditions[J].Chemical Engineering Journal,2013,230:93-101.
[20]TOPOLNICKI J,KUDASIK M,DUTKA B.Simplified model of the CO2/CH4 exchange sorption process[J].Fuel Processing Technology,2013,113:67-74.
[21]孙可明,吴迪,粟爱国,等.超临界CO2作用下煤体渗透性与孔隙压力-有效体积应力-温度耦合规律实验研究[J].岩石力学与工程学报,2013,32(增刊2):3760-3767.SUN Keming,WU Di,SU Aiguo,et al.Coupling experimental study of coal permeability with pore pressure-effective volume stress-temperature under supercritical carbon dioxide action[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(S2):3760-3767.
[22]RANATHUNGA A S,PERERA M S A,RANJITH P G,et al.Amacro-scale experimental study of sub-and super-critical CO2flow behaviour in Victorian brown coal[J].Fuel,2015,158:864-873.
[23]RANATHUNGA A S,PERERA M S A,Ranjith P G,et al.Super-critical carbon dioxide flow behaviour in low rank coal:Ameso-scale experimental study[J].Journal of CO2 Utilization,2017,20:1-13.
[24]VISHAL V,SINGH T N.A Laboratory investigation of permeability of coal to supercritical CO2[J].Geotechnical&Geological Engineering,2015,33(4):1009-1016.
[25]VISHAL V.In-situ disposal of CO2:Liquid and supercritical CO2permeability in coal at multiple down-hole stress conditions[J].Journal of CO2 Utilization,2017,17:235-242
[26]YANG T,NIE B,YANG D,et al.Experimental research on displacing coalbed methane with supercritical CO2[J].Safety Science,2012,50(4):899-902.
[27]梁卫国,张倍宁,韩俊杰,等.超临界CO2驱替煤层CH4装置及实验研究[J].煤炭学报,2014,39(8):1511-1520.LIANG Weiguo,ZHANG Beining,HAN Junjie,et al.Experimental study on coalbed displacement and recovery by supercritical carbon dioxide injection[J].Journal of China Coal Society,2014,39(8):1511-1520.
[28]中国煤炭工业协会.煤的高压等温吸附实验方法容量法:GB/T 19560-2008[S].北京:中国标准出版社,2008.
[29]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 Zhiqiang,XIAN Xuefu,LONG Qingming.Experiment study of coal permeability under different temperatures and stresses[J].Journal of China University of Mining and Technology,2009,38(4):523-527.
[30]National Institute of Standards and Technology.NIST chemistry webbook,SRD 69[EB/OL][2018-07-12].https://webbook.nist.gov/cgi/fluid.cgi?ID=C124389&Action=Page.
[31]吴迪,孙可明,肖晓春,等.块状型煤中甲烷的非等温吸附-解吸实验研究[J].中国安全科学学报,2012,22(12):122-126.WU Di,SUN Keming,XIAO Xiaochun,et al.Experimental study on methane nonisothermal adsorption on and desorption from block briquette[J].China Safety Science Journal,2012,22(12):122-126.
[2]梁冰,孙可明.低渗透煤层气开采理论及其应用[M].北京:科学出版社,2006.
[3]REUCROFT P J,PATEL H.Gas-induced swelling in coal[J].Fuel,1986,65(6):816-820.
[4]REUCROFT P J,SETHURAMAN A R.Effect of pressure on carbon dioxide induced coal swelling[J].Energy&Fuel,1987,1(1):72-75.
[5]吴世跃,赵文.含吸附煤层气煤的有效应力分析[J].岩石力学与工程学报,2005,24(10):1674-1678.WU Shiyue,ZHAO Wen.Analysis of effective stress in adsorbed methane-coal system[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(10):1674-1678.
[6]刘世奇,王恬,杜艺,等.超临界CO2对烟煤和无烟煤化学结构的影响[J].煤田地质与勘探,2018,46(5):19-25.LIU Shiqi,WANG Tian,DU Yi,et al.The effects of supercritical CO2 on the chemical structure of bituminous coal and anthracite[J].Coal Geology&Exploration,2018,46(5):19-25.
[7]桑树勋.二氧化碳地质存储与煤层气强化开发有效性研究述评[J].煤田地质与勘探,2018,46(5):1-9.SANG Shuxun.Research review on technical effectiveness of CO2 geological storage and enhanced coalbed methane recovery[J].Coal Geology&Exploration,2018,46(5):1-9.
[8]SIEMONS N,BUSCH A.Measurement and interpretation of supercritical CO2 sorption on various coals[J].International Journal of Coal Geology,2007,69(4):229-242.
[9]HOL S,PEACH C J,SPIERS C J.A new experimental method to determine the CO2 sorption capacity of coal[J].Energy Procedia,2011,4:3125-3130.
[10]GENSTERBLUM Y,MERKEL A,BUSCH A,et al.High-pressure CH4 and CO2 sorption isotherms as a function of coal maturity and the influence of moisture[J].International Journal of Coal Geology,2013,118:45-57.
[11]WU D,LIU X,LIANG B,et al.Experiments on displacing methane in coal by injecting supercritical carbon dioxide[J].Energy&Fuels,2018,32(12):12766-12771.
[12]刘会虎,吴海燕,徐宏杰,等.沁水盆地南部深部煤层超临界CO2吸附特征及其控制因素[J].煤田地质与勘探,2018,46(5):37-42.LIU Huihu,WU Haiyan,XU Hongjie,et al.Supercritical CO2adsorption characteristics and their control factors in deep-seated coal seams in southern Qinshui basin[J].Coal Geology&Exploration,2018,46(5):37-42.
[13]KUTCHKO B G,GOODMAN A L,ROSENBAUM E,et al.Characterization of coal before and after supercritical CO2 exposure via feature relocation using field-emission scanning electron microscopy[J].Fuel,2013,107:777-786.
[14]刘长江,张琨,宋璠.CO2地质埋藏深度对高阶煤孔隙结构的影响[J].煤田地质与勘探,2018,46(5):32-36.LIU Changjiang,ZHANG Kun,SONG Fan.Influences of burial depth on pore structure of high-rank coal during the CO2 storage process[J].Coal Geology&Exploration,2018,46(5):32-36.
[15]ZHANG Y,LEBEDEV M,SARMADIVALEH M,et al.Swelling-induced changes in coal microstructure due to supercritical CO2 injection[J].Geophysical Research Letters,2016,43(17):9077-9083.
[16]PERERA M S A,RANJITH P G,VIETE D R.Effects of gaseous and super-critical carbon dioxide saturation on the mechanical properties of bituminous coal from the southern Sydney basin[J].Applied Energy,2013,110:73-81.
[17]RANATHUNGA A S,PERERA M S A,RANJITH P G,et al.Super-critical CO2 saturation-induced mechanical property alterations in low rank coal:An experimental study[J].Journal of Supercritical Fluids,2016,109:134-140.
[18]DUTKA B,KUDASIK M,POKRYSZKA Z,et al.Balance of CO2/CH4 exchange sorption in a coal briquette[J].Fuel Processing Technology,2013,106:95-101.
[19]LEE H H,KIM H J,SHI Y,et al.Competitive adsorption of CO2/CH4 mixture on dry and wet coal from subcritical to supercritical conditions[J].Chemical Engineering Journal,2013,230:93-101.
[20]TOPOLNICKI J,KUDASIK M,DUTKA B.Simplified model of the CO2/CH4 exchange sorption process[J].Fuel Processing Technology,2013,113:67-74.
[21]孙可明,吴迪,粟爱国,等.超临界CO2作用下煤体渗透性与孔隙压力-有效体积应力-温度耦合规律实验研究[J].岩石力学与工程学报,2013,32(增刊2):3760-3767.SUN Keming,WU Di,SU Aiguo,et al.Coupling experimental study of coal permeability with pore pressure-effective volume stress-temperature under supercritical carbon dioxide action[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(S2):3760-3767.
[22]RANATHUNGA A S,PERERA M S A,RANJITH P G,et al.Amacro-scale experimental study of sub-and super-critical CO2flow behaviour in Victorian brown coal[J].Fuel,2015,158:864-873.
[23]RANATHUNGA A S,PERERA M S A,Ranjith P G,et al.Super-critical carbon dioxide flow behaviour in low rank coal:Ameso-scale experimental study[J].Journal of CO2 Utilization,2017,20:1-13.
[24]VISHAL V,SINGH T N.A Laboratory investigation of permeability of coal to supercritical CO2[J].Geotechnical&Geological Engineering,2015,33(4):1009-1016.
[25]VISHAL V.In-situ disposal of CO2:Liquid and supercritical CO2permeability in coal at multiple down-hole stress conditions[J].Journal of CO2 Utilization,2017,17:235-242
[26]YANG T,NIE B,YANG D,et al.Experimental research on displacing coalbed methane with supercritical CO2[J].Safety Science,2012,50(4):899-902.
[27]梁卫国,张倍宁,韩俊杰,等.超临界CO2驱替煤层CH4装置及实验研究[J].煤炭学报,2014,39(8):1511-1520.LIANG Weiguo,ZHANG Beining,HAN Junjie,et al.Experimental study on coalbed displacement and recovery by supercritical carbon dioxide injection[J].Journal of China Coal Society,2014,39(8):1511-1520.
[28]中国煤炭工业协会.煤的高压等温吸附实验方法容量法:GB/T 19560-2008[S].北京:中国标准出版社,2008.
[29]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 Zhiqiang,XIAN Xuefu,LONG Qingming.Experiment study of coal permeability under different temperatures and stresses[J].Journal of China University of Mining and Technology,2009,38(4):523-527.
[30]National Institute of Standards and Technology.NIST chemistry webbook,SRD 69[EB/OL][2018-07-12].https://webbook.nist.gov/cgi/fluid.cgi?ID=C124389&Action=Page.
[31]吴迪,孙可明,肖晓春,等.块状型煤中甲烷的非等温吸附-解吸实验研究[J].中国安全科学学报,2012,22(12):122-126.WU Di,SUN Keming,XIAO Xiaochun,et al.Experimental study on methane nonisothermal adsorption on and desorption from block briquette[J].China Safety Science Journal,2012,22(12):122-126.