页岩-煤吸附CO_2时间效应及变形各向异性试验研究
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摘要
为对比研究页岩和煤在CO_2作用下吸附解吸与变形特性,采用四川盆地龙马溪组页岩和塔山煤矿煤样,利用"高温高压页岩吸附膨胀仪"在0~16 MPa CO_2压力下对以上两类样品进行了长达2 000 h的等温吸附及变形试验。结果表明:在渗透率和CO_2密度共同影响下,页岩和煤吸附平衡时间在0~6 MPa内随平衡压力升高逐渐增加;当CO_2压力到达临界压力附近时,吸附平衡时间急剧缩短(页岩9.3 h,煤4.8 h);继续升高平衡压力,平衡时间再次增加。垂直、平行层理方向弹性模量的差异致使页岩变形各向异性随平衡压力升高不断减弱;煤变形各向异性比页岩更显著,随平衡压力升高波动性较大。页岩在气体压力为10 MPa附近达最大吸附量0.082 mmol/g,其体积应变量与吸附量满足二次函数关系。煤在气体压力为7 MPa附近达最大吸附量1.421 mmol/g,其体积应变量与吸附量呈现良好的线性关系。
To investigate the adsorption and deformation characteristics of shale and coal under CO_2,two kinds of samples including shale in Longmaxi Formation and coal in Tashan mine were collected to conduct a 2 000 hours isothermal adsorption test which was operated at 0-16 MPa CO_2 pressure by "shale adsorption and expansion instrument under high temperature and high pressure". The results showed that under the combined influence of permeability and CO_2 density,the adsorption equilibrium time of shale and coal increased gradually at first,then decreased sharply to the bottom( shale 9.3 h,coal 4.8 h) when CO_2 pressure reached the critical level,finally raised again.The deformation anisotropy of shale decreases with the increase of pressure which is caused by the different elastic modulus.While the isothermal adsorption curves of shale and coal are similar,and have the maximum adsorption capacity of0. 082 mmol/g and 1. 421 mmol/g respectively in the vicinity of 10 MPa and 7 MPa.It was found that the deformation characteristics of shale and coal are obviously different: the volumetric strain and the adsorption capacity modelled an appropriate quadratic function on shale,but fitted a good linear relationship on coal.
To investigate the adsorption and deformation characteristics of shale and coal under CO_2,two kinds of samples including shale in Longmaxi Formation and coal in Tashan mine were collected to conduct a 2 000 hours isothermal adsorption test which was operated at 0-16 MPa CO_2 pressure by "shale adsorption and expansion instrument under high temperature and high pressure". The results showed that under the combined influence of permeability and CO_2 density,the adsorption equilibrium time of shale and coal increased gradually at first,then decreased sharply to the bottom( shale 9.3 h,coal 4.8 h) when CO_2 pressure reached the critical level,finally raised again.The deformation anisotropy of shale decreases with the increase of pressure which is caused by the different elastic modulus.While the isothermal adsorption curves of shale and coal are similar,and have the maximum adsorption capacity of0. 082 mmol/g and 1. 421 mmol/g respectively in the vicinity of 10 MPa and 7 MPa.It was found that the deformation characteristics of shale and coal are obviously different: the volumetric strain and the adsorption capacity modelled an appropriate quadratic function on shale,but fitted a good linear relationship on coal.
引文
[1]LIU Faye,ELLETT Kevin,XIAO Yitian,et al.Assessing the feasibility of CO2storage in the New Albany Shale(Devonian-Mississippian)with potential enhanced gas recovery using reservoir simulation[J].International Journal of Greenhouse Gas Control,2013,17:111-126.
[2]张华珍,王利鹏,刘嘉.煤层气开发技术现状及发展趋势[J].石油科技论坛,2013,32(5):17-27.ZHANG Huazhen,WANG Lipeng,LIU Jia.Current situation and development trend of coal bed gas development[J].Oil Forum,2013,32(5):17-27.
[3]WONG S,LAW D,DENG X,et al.Enhanced coalbed methane and storage in anthracitic coals:micro-pilot test at South Qinshui,Shanxi,China[J].International Journal of Greenhouse Gas Control,2007,1:215-222.
[4]ZOU Caineng,YANG Zhi,PAN Songqi.Shale gas formation and occurrence in China:An overview of the current status and future potential[J].Acta Geologica Sinica-English Edition,2016,90(4):1249-1283.
[5]祝捷,张敏,姜耀东,等.煤吸附解吸CO2变形特征的试验研究[J].煤炭学报,2015,40(5):1081-1086.ZHU Jie,ZHANG Min,JIANG Yaodong,et al.Experimental study on the deformation characteristics of coal when adsorption desorption CO2[J].Journal of China Coal Society,2015,40(5):1081-1086.
[6]DAY Stuart,FRY Robyn,SAKUROVS Richard,et al.Swelling of coals by supercritical gases and its relationship to Sorption[J].Energy&Fuels,2010,24(4):2777-2783.
[7]PEKOT L J,REEVES S R.Modeling coal matrix shrinkage and differential swelling with CO2injection for enhanced coalbed methane recovery and carbon sequestration applications[R].Houston,U.S.:Department of Energy,2002.
[8]HELLER R,ZOBACK M.Adsorption of methane and carbon dioxide on gas shale and pure mineral samples[J].Journal of Unconventional Oil and Gas Resources,2014,8(2):14-24.
[9]敖翔,卢义玉,汤积仁,等.页岩吸附二氧化碳变形特性试验研究[J].煤炭学报,2015,40(12):2893-2899.AO Xiang,LU Yiyu,TANG Jiren,et al.Experimental study on the deformation characteristics of carbon dioxide in shale[J].Journal of China Coal Society,2015,40(12):2893-2899.
[10]王兰生,邹春艳,郑平,等.四川盆地下古生界存在页岩气的地球化学依据[J].天然气工业,2009,29(5):59-62.WANG Lansheng,ZOU Chunyan,ZHENG Ping,et al.Geochemical evidence of shale gas in the lower Paleozoic in Sichuan Basin[J].Natural Gas Industry,2009,29(5):59-62.
[11]张东晓,杨婷云.页岩气开发综述[J].石油学报,2013,34(4):792-801.ZHANG Dongxiao,YANG Tingyun.An overview of shale-gas production[J].Acta Petrolei Sinica,2013,34(4):792-801.
[12]刘延锋,李小春,白冰.中国CO2煤层储存容量初步评价[J].岩石力学与工程学报,2005,24(16):2947-2952.LIU Yanfeng,LI Xiaochun,BAI Bing.Preliminary evaluation of CO2coal seam storage capacity in China[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2947-2952.
[13]吴克柳,李相方,陈掌星.页岩气纳米孔气体传输模型[J].石油学报,2015,36(7):837-848.WU Keliu,LI Xiangfang,CHEN Zhangxing.A model for gas transport through nanopores of shale gas reservoirs[J].Acta Petrolei Sinica,2015,36(7):837-848.
[14]盛茂,李根生,黄中伟,等.考虑表面扩散作用的页岩气瞬态流动模型[J].石油学报,2014,35(2):347-352.SHENG Mao,LI Gensheng,HUANG Zhongwei,et al.Shale gas transient flow model with effects of surface diffusion[J].Acta Petrolei Sinica,2014,35(2):347-352.
[15]郭彪,侯吉瑞,于春磊.CO2在多孔介质中扩散系数的测定[J].石油化工高等学校学报,2009,22(4):38-42.GUO Biao,HOU Jirui,YU Chunlei.Determination of diffusion coefficient for carbon dioxide in the porous media[J].Journal of Petrochemical Universities,2009,22(4):38-42.
[16]敖翔.超临界CO2作用下页岩变形及CO2运移规律研究[D].重庆:重庆大学,2016.AO Xiang.Supercritical CO2-induced deformation strain on shale and Supercritical CO2migration law in shale[D].Chongqing:Chongqing University,2016.
[17]祝捷,姜耀东,赵毅鑫,等.考虑吸附作用的各向异性煤体有效应力[J].中国矿业大学学报,2010,39(5):699-704.ZHU Jie,JIANG Yaodong,ZHAO Yixin.Effective stress of anisotropic coal considering adsorption[J].Journal of China University of Mining&Technology,2010,39(5):699-704.
[18]王登科,魏建平,尹光志.复杂应力路径下含瓦斯煤渗透性变化规律研究[J].岩石力学与工程学报,2012,31(2):303-310.WANG Dengke,WEI Jianping,YIN Guangzhi.Investigation on change rule of permeability of coal containing gas under complex stress paths[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(2):303-310.
[19]张宏学,刘卫群,朱立.页岩储层裂隙渗透率模型和试验研究[J].岩土力学,2015,36(3):719-729.ZHANG Hongxue,LIU Weiqun,ZHU Li.Fracture permeability model and experiments of shale gas reservoirs[J].Journal of Geotechnical Mechanics,2015,36(3):719-729.
[20]孙扬.天然气藏超临界CO2埋存及提高天然气采收率机理[D].南充:西南石油大学,2012.SUN Yang.Supercritical CO2storage of natural gas reservoirs and mechanism of enhancing natural gas recovery[D].Nanchong:Southwest Petroleum University,2012.
[21]SIEMONS Nikolai,BUSCH Andreas.Measurement and interpretation of supercritical CO2sorption on various coals[J].International Journal of Coal Geology,2007,69(4):229-242.
[22]YANG Nannan,LIU Shuyan,YANG Xiaoning.Molecular simulation of preferential adsorption of CO2over CH4in Namontmorillonite clay material[J].Applied Surface Science,2015,356:1262-1271.
[23]周尚文,王红岩,薛华庆,等.页岩过剩吸附量与绝对吸附量的差异及页岩气储量计算新方法[J].天然气工业,2016,36(11):12-20.ZHOU Shangwen,WANG Hongyan,XUE Huaqing,et al.Difference between excess and absolute adsorption capacity of shale and a new shale gas reserve calculation method[J].Natural Gas Industry,2016,36(11):12-20.
[24]陈尚斌,朱炎铭,王红岩,等.川南龙马溪组页岩气储层纳米孔隙结构特征及其成藏意义[J].煤炭学报,2012,37(3):438-444.CHEN Shangbin,ZHU Yanming,WANG Hongyan,et al.Structure characteristics and accumulation significance of nanopores in Longmaxi shale gas reservoir in the southern Sichuan Basin[J].Journal of China Coal Society,2012,37(3):438-444.
[25]CHEN Tianyu,Feng Xiating,PAN Zhejun.Experimental study of swelling of organic rich shale in methane[J].International Journal of Coal Geology,2015,150-151:64-73.
[26]衡帅,杨春和,张保平,等.页岩各向异性特征的试验研究[J].岩土力学,2015,36(3):609-616.HENG Shuai,YANG Chunhe,ZHANG Baoping,et al.Experimental research on anisotropic properties of shale[J].Rock and Soil Mechanics,2015,36(3):609-616.
[27]JAN Lin,TING Ren,WANG Gongda.Experimental study of the adsorption-induced coal matrix sweeling and its impact on ECBM[J].Journal of Earth Science,2017,28(5):917-925.
[28]DAY Stuart,FRY Robyn,SAKUROVS Richard.Swelling of Australian coals in supercritical CO2[J].International Journal of Coal Geology,2008,74(1):41-52.
[29]曹树刚,张遵国,李毅,等.突出危险煤吸附-解吸瓦斯变形特性试验研究[J].煤炭学报,2013,38(10):1792-1799.CAO Shugang,ZHANG Zunguo,LI Yi,et al.Experimental study on gas deformation characteristics of outburst dangerous coal[J].Journal of China Coal Society,2013,38(10):1792-1799.
[30]李子文,林柏泉,郝志勇.煤层孔径分布特征及其对瓦斯吸附的影响[J].煤炭学报,2013,42(6):1047-1053.LI Ziwen,LIN Boquan,HAO Zhiyong.Characteristics of pore size distribution of coal and its impacts on gas adsorption[J].Journal of China Coal Society,2013,42(6):1047-1053.
[31]CHAREONSUPPANIMIT Pongtorn,MOHAMMAD Sayeed A,ROBINSON Robert L,et al.High-pressure adsorption of gases on shales:Measurements and modeling[J].International Journal of Coal Geology,2012,95:34-46.
[2]张华珍,王利鹏,刘嘉.煤层气开发技术现状及发展趋势[J].石油科技论坛,2013,32(5):17-27.ZHANG Huazhen,WANG Lipeng,LIU Jia.Current situation and development trend of coal bed gas development[J].Oil Forum,2013,32(5):17-27.
[3]WONG S,LAW D,DENG X,et al.Enhanced coalbed methane and storage in anthracitic coals:micro-pilot test at South Qinshui,Shanxi,China[J].International Journal of Greenhouse Gas Control,2007,1:215-222.
[4]ZOU Caineng,YANG Zhi,PAN Songqi.Shale gas formation and occurrence in China:An overview of the current status and future potential[J].Acta Geologica Sinica-English Edition,2016,90(4):1249-1283.
[5]祝捷,张敏,姜耀东,等.煤吸附解吸CO2变形特征的试验研究[J].煤炭学报,2015,40(5):1081-1086.ZHU Jie,ZHANG Min,JIANG Yaodong,et al.Experimental study on the deformation characteristics of coal when adsorption desorption CO2[J].Journal of China Coal Society,2015,40(5):1081-1086.
[6]DAY Stuart,FRY Robyn,SAKUROVS Richard,et al.Swelling of coals by supercritical gases and its relationship to Sorption[J].Energy&Fuels,2010,24(4):2777-2783.
[7]PEKOT L J,REEVES S R.Modeling coal matrix shrinkage and differential swelling with CO2injection for enhanced coalbed methane recovery and carbon sequestration applications[R].Houston,U.S.:Department of Energy,2002.
[8]HELLER R,ZOBACK M.Adsorption of methane and carbon dioxide on gas shale and pure mineral samples[J].Journal of Unconventional Oil and Gas Resources,2014,8(2):14-24.
[9]敖翔,卢义玉,汤积仁,等.页岩吸附二氧化碳变形特性试验研究[J].煤炭学报,2015,40(12):2893-2899.AO Xiang,LU Yiyu,TANG Jiren,et al.Experimental study on the deformation characteristics of carbon dioxide in shale[J].Journal of China Coal Society,2015,40(12):2893-2899.
[10]王兰生,邹春艳,郑平,等.四川盆地下古生界存在页岩气的地球化学依据[J].天然气工业,2009,29(5):59-62.WANG Lansheng,ZOU Chunyan,ZHENG Ping,et al.Geochemical evidence of shale gas in the lower Paleozoic in Sichuan Basin[J].Natural Gas Industry,2009,29(5):59-62.
[11]张东晓,杨婷云.页岩气开发综述[J].石油学报,2013,34(4):792-801.ZHANG Dongxiao,YANG Tingyun.An overview of shale-gas production[J].Acta Petrolei Sinica,2013,34(4):792-801.
[12]刘延锋,李小春,白冰.中国CO2煤层储存容量初步评价[J].岩石力学与工程学报,2005,24(16):2947-2952.LIU Yanfeng,LI Xiaochun,BAI Bing.Preliminary evaluation of CO2coal seam storage capacity in China[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2947-2952.
[13]吴克柳,李相方,陈掌星.页岩气纳米孔气体传输模型[J].石油学报,2015,36(7):837-848.WU Keliu,LI Xiangfang,CHEN Zhangxing.A model for gas transport through nanopores of shale gas reservoirs[J].Acta Petrolei Sinica,2015,36(7):837-848.
[14]盛茂,李根生,黄中伟,等.考虑表面扩散作用的页岩气瞬态流动模型[J].石油学报,2014,35(2):347-352.SHENG Mao,LI Gensheng,HUANG Zhongwei,et al.Shale gas transient flow model with effects of surface diffusion[J].Acta Petrolei Sinica,2014,35(2):347-352.
[15]郭彪,侯吉瑞,于春磊.CO2在多孔介质中扩散系数的测定[J].石油化工高等学校学报,2009,22(4):38-42.GUO Biao,HOU Jirui,YU Chunlei.Determination of diffusion coefficient for carbon dioxide in the porous media[J].Journal of Petrochemical Universities,2009,22(4):38-42.
[16]敖翔.超临界CO2作用下页岩变形及CO2运移规律研究[D].重庆:重庆大学,2016.AO Xiang.Supercritical CO2-induced deformation strain on shale and Supercritical CO2migration law in shale[D].Chongqing:Chongqing University,2016.
[17]祝捷,姜耀东,赵毅鑫,等.考虑吸附作用的各向异性煤体有效应力[J].中国矿业大学学报,2010,39(5):699-704.ZHU Jie,JIANG Yaodong,ZHAO Yixin.Effective stress of anisotropic coal considering adsorption[J].Journal of China University of Mining&Technology,2010,39(5):699-704.
[18]王登科,魏建平,尹光志.复杂应力路径下含瓦斯煤渗透性变化规律研究[J].岩石力学与工程学报,2012,31(2):303-310.WANG Dengke,WEI Jianping,YIN Guangzhi.Investigation on change rule of permeability of coal containing gas under complex stress paths[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(2):303-310.
[19]张宏学,刘卫群,朱立.页岩储层裂隙渗透率模型和试验研究[J].岩土力学,2015,36(3):719-729.ZHANG Hongxue,LIU Weiqun,ZHU Li.Fracture permeability model and experiments of shale gas reservoirs[J].Journal of Geotechnical Mechanics,2015,36(3):719-729.
[20]孙扬.天然气藏超临界CO2埋存及提高天然气采收率机理[D].南充:西南石油大学,2012.SUN Yang.Supercritical CO2storage of natural gas reservoirs and mechanism of enhancing natural gas recovery[D].Nanchong:Southwest Petroleum University,2012.
[21]SIEMONS Nikolai,BUSCH Andreas.Measurement and interpretation of supercritical CO2sorption on various coals[J].International Journal of Coal Geology,2007,69(4):229-242.
[22]YANG Nannan,LIU Shuyan,YANG Xiaoning.Molecular simulation of preferential adsorption of CO2over CH4in Namontmorillonite clay material[J].Applied Surface Science,2015,356:1262-1271.
[23]周尚文,王红岩,薛华庆,等.页岩过剩吸附量与绝对吸附量的差异及页岩气储量计算新方法[J].天然气工业,2016,36(11):12-20.ZHOU Shangwen,WANG Hongyan,XUE Huaqing,et al.Difference between excess and absolute adsorption capacity of shale and a new shale gas reserve calculation method[J].Natural Gas Industry,2016,36(11):12-20.
[24]陈尚斌,朱炎铭,王红岩,等.川南龙马溪组页岩气储层纳米孔隙结构特征及其成藏意义[J].煤炭学报,2012,37(3):438-444.CHEN Shangbin,ZHU Yanming,WANG Hongyan,et al.Structure characteristics and accumulation significance of nanopores in Longmaxi shale gas reservoir in the southern Sichuan Basin[J].Journal of China Coal Society,2012,37(3):438-444.
[25]CHEN Tianyu,Feng Xiating,PAN Zhejun.Experimental study of swelling of organic rich shale in methane[J].International Journal of Coal Geology,2015,150-151:64-73.
[26]衡帅,杨春和,张保平,等.页岩各向异性特征的试验研究[J].岩土力学,2015,36(3):609-616.HENG Shuai,YANG Chunhe,ZHANG Baoping,et al.Experimental research on anisotropic properties of shale[J].Rock and Soil Mechanics,2015,36(3):609-616.
[27]JAN Lin,TING Ren,WANG Gongda.Experimental study of the adsorption-induced coal matrix sweeling and its impact on ECBM[J].Journal of Earth Science,2017,28(5):917-925.
[28]DAY Stuart,FRY Robyn,SAKUROVS Richard.Swelling of Australian coals in supercritical CO2[J].International Journal of Coal Geology,2008,74(1):41-52.
[29]曹树刚,张遵国,李毅,等.突出危险煤吸附-解吸瓦斯变形特性试验研究[J].煤炭学报,2013,38(10):1792-1799.CAO Shugang,ZHANG Zunguo,LI Yi,et al.Experimental study on gas deformation characteristics of outburst dangerous coal[J].Journal of China Coal Society,2013,38(10):1792-1799.
[30]李子文,林柏泉,郝志勇.煤层孔径分布特征及其对瓦斯吸附的影响[J].煤炭学报,2013,42(6):1047-1053.LI Ziwen,LIN Boquan,HAO Zhiyong.Characteristics of pore size distribution of coal and its impacts on gas adsorption[J].Journal of China Coal Society,2013,42(6):1047-1053.
[31]CHAREONSUPPANIMIT Pongtorn,MOHAMMAD Sayeed A,ROBINSON Robert L,et al.High-pressure adsorption of gases on shales:Measurements and modeling[J].International Journal of Coal Geology,2012,95:34-46.