韩思杰,桑树勋,梁晶晶
HAN Sijie,SANG Shuxun,LIANG Jingjing

• 1:中国矿业大学煤层气资源与成藏过程教育部重点实验室
• 2:中国矿业大学资源与地球科学学院

摘要(Abstract)：

煤层气吸附作用是发生在煤基质内表面的物理过程,而煤岩复杂孔裂隙网络为高压甲烷吸附提供了丰富的空间。开展沁水盆地南部高阶煤30℃高压甲烷等温吸附实验,结合煤岩煤质参数与孔隙特征参数,通过改进的D-R模型分析了煤岩性质、孔隙特征与吸附参数的相关性。煤岩性质对最大吸附能力和吸附热参数的影响是多因素叠加的综合效应,而最大吸附能力与微孔体积,吸附体积校正参数与大中孔比表面积呈较好的正相关性,表明甲烷分子在煤基质内表面会根据孔径尺度大小呈现不同的吸附方式。据此提出高压甲烷在煤基质微孔中呈紧密堆积状态而在大中孔中呈多层分子堆叠状态的新认识,为进一步研究煤层气吸附机理提供了新的思路。
Methane adsorption is a physical process occurring in the inner-surface of coal pores. The pore network in coals provides plenty of accommodation for medium and high-pressure methane adsorption. In this study, we conducted high-pressure methane adsorption on southern Qinshui medium and high rank coals. We further discuss the relationship between adsorption parameters obtained from modified D-R model and coal properties and porosity characters. The results indicate that the effect of coal properties on the maximum adsorption capacity and heat of adsorption is a multi-factor-related superimposition. There is a discernible positive correlation between the maximum adsorption capacity with micropore volume and the revised parameter of adsorption amount with specific surface area of macro-mesopore. Methane molecule may display different adsorption behavior according to the pore width on the coal inner surface. On the basis of above observations, a primary understanding of high-pressure methane adsorption in relation to different pore width was proposed, which may provide a new insight of methane adsorption mechanism.

关键词(KeyWords)： 孔径;高压吸附;改进的D-R模型;微孔填充;中高阶煤;沁水盆地南部
pore width;high pressure adsorption;a modified D-R model;micropore filling;middle and high-rank coal;southern Qinshui basin

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(41330638);; 煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金资助项目(2018-004)~~

作者(Author): 韩思杰,桑树勋,梁晶晶
HAN Sijie,SANG Shuxun,LIANG Jingjing

参考文献(References)：

• [1]桑树勋,朱炎铭,张井,等.液态水影响煤吸附甲烷的实验研究:以沁水盆地南部煤储层为例[J].科学通报,2005,50(增刊1):70-75.SANG Shuxun,ZHU Yanming,ZHANG Jing,et al.Experimental study on methane adsorption effected by liquid moisture,with southern Qinshui coals reservoir as example[J].Science Bulletin,2005,50(S1):70-75.
• [2]SU X,LIN X,ZHAO M,et al.The Upper Paleozoic coalbed methane system in the Qinshui basin,China[J].AAPG Bulletin,2005,89(1):81-100.
• [3]叶建平,冯三利,范志强,等.沁水盆地南部注二氧化碳提高煤层气采收率微型先导性试验研究[J].石油学报,2007,28(4):77-80.YE Jianping,FENG Sanli,FAN Zhiqiang,et al.Micro-pilot test for enhanced coalbed methane recovery by injecting carbon dioxide in the south of Qinshui basin[J].Acta Petrolei Sinica,2007,28(4):77-80.
• [4]秦勇,姜波,王继尧,等.沁水盆地煤层气构造动力条件耦合控藏效应[J].地质学报,2008,82(10):1355-1362.QIN Yong,JIANG Bo,WANG Jiyao,et al.Coupling control of tectonic dynamical conditions of coalbed methane reservoir formation in the Qinshui basin,Shanxi,China[J].Acta Geologica Sinica,2008,82(10):1355-1362.
• [5]薛岗,许茜,王红霞,等.沁水盆地煤层气田樊庄区块地面集输工艺优化[J].天然气工业,2010,30(6):87-90.XUE Gang,XU Qian,WANG Hongxia,et al.Process optimization of surface gathering system:Case history of the Fanzhuang block in the coalbed methane gas fields,Qinshui basin[J].Natural Gas Industry,2010,30(6):87-90.
• [6]CAI Y,LIU D,YAO Y,et al.Geological controls on prediction of coalbed methane of No.3 coal seam in southern Qinshui basin,North China[J].International Journal of Coal Geology,2011,88(2):101-112.
• [7]ZHOU F,HOU W,ALLINSONG,et al.A feasibility study of ECBM recovery and CO2,storage for a producing CBM field in southeast Qinshui basin,China[J].International Journal of Greenhouse Gas Control,2013,19(19):26-40.
• [8]ZHANG Z,QIN Y,BAI J P,et al.Evaluation of favorable regions for multi-seam coalbed methane joint exploitation based on a fuzzy model-a case study in southern Qinshui basin,China[J].Energy Exploration&Exploitation,2016,34(3).
• [9]LIANG M,PENG S,DU W,et al.Tectonic stress estimation from ultrasonic borehole image logs in a coal bed methane well,northeastern Qinshui basin,China[J].Journal of Natural Gas Science&Engineering,2018,52.
• [10]于洪观,范维唐,孙茂远,等.煤中甲烷等温吸附模型的研究[J].煤炭学报,2004,29(4):463-467.YU Hongguan,FAN Weitang,SUN Maoyuan,et al.Study on fitting models for methane isotherms adsorption of coals[J].Journal of China Coal Society,2004,29(4):463-467.
• [11]LI W,CHENG Y,WU D,et al.CO2 isothermal adsorption models of coal in the Haishiwan coalfield[J].International Journal of Mining Science and Technology,2010,20(2):281-285.
• [12]赵龙,秦勇,杨兆彪,等.煤中超临界甲烷等温吸附模型研究[J].天然气地球科学,2014,25(5):753-760.ZHAO Long,QIN Yong,YANG Zhaobiao,et al.Study on supercritical isothermal adsorption model of methane in coal[J].Natural Gas Geoscience,2014,25(5):753-760.
• [13]CHATTARAJ S,MOHANTY D,KUMAR T,et al.Thermodynamics,kinetics and modeling of sorption behaviour of coalbed methane:A review[J].Journal of Unconventional Oil&Gas Resources,2016,16:14-33.
• [14]RADLINSKIA P,MASTALERZM,HINDEAL,et al.Application of saxs and sans in evaluation of porosity,pore size distribution and surface area of coal[J].International Journal of Coal Geology,2004,59(3):245-271.
• [15]姚艳斌,刘大锰,蔡益栋,等.基于NMR和X-CT的煤的孔裂隙精细定量表征[J].中国科学:地球科学,2010,40(11):1598-1607.YAO Yanbin,LIU Dameng,CAI Yidong,et al.Advanced characterization of pore and fractures in coals by nuclear magnetic resonance and X-ray computer tomograpgy[J].Science China Earth Science,2010,40(11):1598-1607.
• [16]邵龙义,肖正辉,何志平,等.晋东南沁水盆地石炭-二叠纪含煤岩系古地理及聚煤作用研究[J].古地理学报,2006,8(1):43-52.SHAO Longyi,XIAO Zhenghui,HE Zhiping,et al.Palaeogeography and coal accumulation for coal measures of the Carboniferous-Permian in Qinshui basin,southeastern Shanxi Province[J].Journal of Palaeogeography,2006,8(1):43-52.
• [17]琚宜文,侯泉林,范俊佳.沁水盆地构造演化与煤层气成藏条件[J].矿物岩石地球化学通报,2008,27(增刊1):77-78.JU Yiwen,HOU Quanlin,FAN Junjia.Tectonic evolution and coalbed methane accumulation conditions in the Qinshui basin[J].Bulletin of Mineralogy,Petrology and Geochemistry,2008,27(S1):77-78.
• [18]刘焕杰.山西南部煤层气地质[M].徐州:中国矿业大学出版社,1998.
• [19]李五忠,王一兵,崔思华,等.沁水盆地南部煤层气田煤层气成藏条件分析[J].煤田地质与勘探,2003,31(2):23-26.LI Wuzhong,WANG Yibing,CUI Sihua,et al.Analysis of the generation condition of coalbed gas reservoir,southern Qinshui basin[J].Coal Geology&Exploration,2003,31(2):23-26.
• [20]MAVOR M J,OWEN L B,PRATT T J.Measurement and evaluation of coal sorption isotherm data[C]//Society of Petroleum Engineers,1990.
• [21]CUI Yongjun,ZHANG Qun.Features of the excess adsorption isotherms of high-pressure methane adsorption on coal and simulation model[J].Acta Geologica Sinica(English Edition),2010,84(6):1547-1554.
• [22]PINI R.Interpretation of net and excess adsorption isotherms in microporous adsorbents[J].Microporous&Mesoporous Materials,2014,187(5):40-52.
• [23]SAKUROVS R,DAY S,WEIR S,et al.Application of a modified dubinin-radushkevich equation to adsorption of gases by coals under supercritical conditions[J].Energy&Fuels,2007,21(2):992-997.
• [24]DAY S,DUFFY G,SAKUROVS R,et al.Effect of coal properties on CO2 sorption capacity under supercritical conditions[J].International Journal of Greenhouse Gas Control,2008,2(3):342-352.
• [25]SAKUROVS R,DAY S,WEIR S.Relationships between the sorption behaviour of methane,carbon dioxide,nitrogen and ethane on coals[J].Fuel,2012,97:725-729.
• [26]LEVY J H,DAY S J,KILLINGLEY J S.Methane capacities of Bowen basin coals related to coal properties[J].Fuel,1997,76(9):813-819.
• [27]张庆玲,张群,张泓,等.我国不同时代不同煤级煤的吸附特征[J].煤田地质与勘探,2004,32(增刊1):68-72.ZHANG Qingling,ZHANG Qun,ZHANG Hong,et al.Adsorption characteristics of different rank coals in different areas,China[J].Coal Geology&Exploration,2004,32(S1):68-72.
• [28]吴代赦,郑宝山,唐修义,等.中国煤中氮的含量及其分布[J].地球与环境,2006,34(1):1-6.WU Daishe,ZHENG Baoshan,TANG Xiuyi,et al.Contents and distribution of nitrogen in Chinese coals[J].Earth and Environment,2006,34(1):1-6.
• [29]OZDEMIR E,MORSI B I,SCHROEDER K.CO2 adsorption capacity of Argonne premium coals[J].Fuel,2004,83(7/8):1085-1094.
• [30]GOODMANA L,CAMPUS L M,SCHROEDER K T.Direct evidence of carbon dioxide sorption on Argonne premium coals using attenuated total reflectance-Fourier transform infrared spectroscopy[J].Energy&Fuels,2011,19(2):471-476.
• [31]DUBININ M M.Chemistry and physics of carbon[M].New York:Marcel Dekker,1966:51-120.
• [32]尹帅,丁文龙,刘建军,等.基于微孔充填模型的页岩储层吸附动力学特征分析[J].高校地质学报,2014,20(4):635-641.YIN Shuai,DING Wenlong,LIU Jianjun,et al.Adsorption dynamics analysis of shale reservoir based on micro-pore filling model[J].Geological Journal of China Universities,2014,20(4):635-641.
• [33]RUTHVEN D M.Principles of adsorption and adsorption process[M].New York:John Wiley&Sons,1984.
• [34]BRUNAUER S,EMMETT P H,TELLER E.Adsorption of gases in multimolecular layers[J].Journal of the American Chemical Society,1938,60(2):309-319.

文章评论(Comment)：