党广兴,吴财芳,赵凯,梁冲冲,姜玮
DANG Guangxing,WU Caifang,ZHAO Kai,LIANG Chongchong,JIANG Wei

• 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)：

通过压汞、液氮吸附实验对贵州珠藏向斜无烟煤孔隙结构特征进行研究,根据实验结果分析孔隙结构特征,并结合等温吸附试验,探讨了煤孔隙结构特征对其吸附性的影响。结果表明:珠藏向斜无烟煤主要以微孔、小孔为主,比表面积主要由微孔控制;"孔隙遮挡效应理论"能够很好地解释低退汞效率、高滞后环现象;由于测试原理不同,液氮、压汞实验结果有较大差异;研究区Langmuir体积平均为36.70 m3/t,Langmuir压力平均为3.23 MPa,Langmuir体积、Langmuir压力与微孔比表面积、退汞效率均呈现正相关;另外,Langmuir压力受微孔结构影响较大,特别是封闭孔的含量,封闭孔越多,Langmuir压力越高。
T Based on the result from the mercury intrusion analyses and low temperature nitrogen adsorption/desorption, the property of pore system of anthracite in Zhu-Zang syncline was analyzed systematically. Combined with isothermal adsorption test, the effect of pore structure on adsorption characteristics had been discussed. The research show that pores in the samples are dominated by micro-pores and the specific surface area mainly comes from the micro-pores. There is a hysteresis loop between the mercury intrusion and extrusion curves and the hysteresis loop did not close when the imposed pressure was reduced back to ambient. The hysteresis behavior and entrapment of mercury can be explained by the pore shielding effect. The result of mercury intrusion is higher than low temperature nitrogen adsorption/desorption due to entire difference in the experimental principles. Langmuir equation was used to characterize the adsorption characteristics of anthracite. The average value of Langmuir volume was 36.70 m3/t, the average value of Langmuir pressure was 3.23 MPa. Langmuir volume and Langmuir pressure increased with the micro-pore surface area and the efficiency of mercury ejection. Additionally, Langmuir pressure seems to be quite sensitive to micro-pore structure. An increase in closed pore leads higher Langmuir pressure.

关键词(KeyWords)： 珠藏向斜;无烟煤;孔隙特征;吸附性
Zhu-Zang syncline;anthracite;pore property;adsorption characteristics

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41572140,41272178);; 国家科技重大专项项目(2016ZX05044)~~

作者(Author): 党广兴,吴财芳,赵凯,梁冲冲,姜玮
DANG Guangxing,WU Caifang,ZHAO Kai,LIANG Chongchong,JIANG Wei

参考文献(References)：

• [1]王恩元,何学秋.煤岩等多孔介质的分形特征[J].焦作工学院学报,1996,15(4):20–24.WANG Enyuan,HE Xueqiu.Fractal structure of coal,rock and other porous media[J].Journal of Jiaozuo Institute of Technology,1996,15(4):20–24.
• [2]ZHOU F,HUSSAIN F,CINAR Y.Injecting pure N2 and CO2 to coal for enhanced coalbed methane:Experimental observations and numerical simulation[J].International Journal of Coal Geology,2013,116/117:53–62.
• [3]颜志丰,唐书恒,方念乔,等.沁水盆地高家庄区块煤储层的孔隙特征[J].煤炭科学技术,2009,37(2):103–107.YAN Zhifeng,TANG Shuheng,FANG Nianqiao,et al.Porosity features of coal deposits in Gaojiazhuang block of Qinshui basin[J].Coal Science and Technology,2009,37(2):103–107.
• [4]范俊佳,琚宜文,柳少波,等.不同煤储层条件下煤岩微孔结构及其对煤层气开发的启示[J].煤炭学报,2013,38(3):441–447.FAN Junjia,JU Yiwen,LIU Shaobo,et al.Micro-pore structure of coal under different reservoir conditions and its implication for coalbed methane development[J].Journal of China Coal Society,2013,38(3):441–447.
• [5]秦勇.中国高煤级煤的显微岩石学特征及结构演化[M].徐州:中国矿业大学出版社,1994:95–99.
• [6]傅学海,秦勇,韦重韬,等.煤层气地质学[M].徐州:中国矿业大学出版社,2007:44–46.
• [7]陈萍,唐修义.低温氮吸附法与煤中微孔隙特征的研究[J].煤炭学报,20012,6(5):552–556.CHEN Ping,TANG Xiuyi.The research on the adsorption of nitrogen in low-temperature and micro-pore properties in coal[J].Journal of China Coal Society,2001,26(5):552–556.
• [8]降文萍,宋孝忠,钟玲文.基于低温液氮实验的不同煤体结构煤的孔隙特征及其对瓦斯突出影响[J].煤炭学报,2011,36(4):609–614.JIANG Wenping,SONG Xiaozhong,ZHONG Lingwen.Research on the pore properties of different coal body structure coals and the effects on gas outburst based on the low-temperature nitrogen adsorption method[J].Journal of China Coal Society,2011,36(4):609–614.
• [9]姚艳斌,刘大锰,黄文辉,等.两淮煤田煤储层孔-裂隙系统与煤层气产出性能研究[J].煤炭学报,2006,31(2):163–168.YAO Yanbin,LIU Dameng,HUANG Wenhui,et al.Research on the pore-fractures system properties of coalbed methane reservoirs and recovery in Huainan and Huaibei coal-fields[J].Journal of China Coal Society,2006,31(2):163–168.
• [10]高弟,秦勇,易同生.论贵州煤层气地质特点与勘探开发战略[J].中国煤炭地质,2009,21(3):20–23.GAO Di,QIN Yong,YI Tongsheng.Geological condition,exploration and exploitation strategy of coal-bed methane resources in Guizhou,China[J].Coal Geology of China,2009,21(3):20–23.
• [11]常会珍,秦勇,王飞.贵州珠藏向斜煤样孔隙结构的差异性及其对渗流能力的影响[J].高校地质学报,2012,18(3):544–548.CHANG Huizhen,QIN Yong,WANG Fei.Differences in of pore structure of coals and their impact on the permeability of coals from the Zhu-Zang syncline,Guizhou Province[J].Geological Journal of China Universities,2012,18(3):544–548.
• [12]常会珍,秦勇.黔西红梅勘探区主煤层含气性及其地质影响因素[J].煤炭科学技术,2012,40(2):107–110.CHANG Huizhen,QIN Yong.Gas bearing property and geological influence factors of major seam in Hongmei exploration area of western Guizhou[J].Coal Science and Technology,2012,40(2):107–110.
• [13]葛燕燕,傅雪海,李鑫,等.贵州珠藏向斜煤系含水系统对煤层气赋存的影响[J].煤炭学报,2015,40(2):403–411.GE Yanyan,FU Xuehai,LI Xin,et al.Influences of coal measures water-bearing system of on the coalbed methane occurrence and development in Zhu-Zang syncline,Guizhou Province[J].Journal of China Coal Society,2015,40(2):403–411.
• [14]马伟竣.织金珠藏次向斜煤层含气量分布特征及影响因素研究[J].油气藏评价与开发,2014,4(3):64–67.MA Weijun.Distribution characteristics and influential factors of coalbed methane content in Zhu-Zang sub-syncline of Zhijin area[J].Reservoir Evaluation and Development,2014,4(3):64–67.
• [15]霍多特B B.煤与瓦斯突出[M].宋士钊,王佑安,译.北京:中国工业出版社,1966:26–35.
• [16]姚艳斌,刘大锰,汤达祯,等.华北地区煤层气储集与产出性能[J].石油勘探与开发,2007,34(6),664–668.YAO Yanbin,LIU Dameng,TANG Dazhen,et al.Preservation and deliverability characteristics of coalbed methane,North China[J].Petroleum Exploration and Development,2007,34(6):664–668.
• [17]陈贞龙,汤达祯,许浩,等.黔西滇东地区煤层气储层孔隙系统与可采性[J].煤炭学报,2010,35(增刊1):158–163.CHEN Zhenlong,TANG Dazhen,XU Hao,et al.The pore system properties of coalbed methane reservoirs and recovery in western Guizhou and eastern Yunnan[J].Journal of China Coal Society,2010,35(S1):158–163.
• [18]WARDLAW N C,MCKELLAR M.Mercury porosimetry and the interpretation of pore geometry in sedimentary rocks and artificial models[J].Powder Technology,1981,29(1):127–143.
• [19]RIGBY S P,EDLER K J.The Influence of mercury contact angle,surface tension,and retraction mechanism on the interpretation of mercury porosimetry data[J].Journal of Colloid&Interface Science,2002,250(1):175–190.
• [20]YAO Y B,LIU D M.Comparison of low-field NMR and mercury intrusion porosimetry in characterizing pore size distributions of coals[J].Fuel,2012,95(1):152–158.
• [21]赵丽娟,秦勇,WANG Geoff,等.高温高压条件下深部煤层气吸附行为[J].高校地质学报,2013,19(4):648–654.ZHAO Lijuan,QIN Yong,WANG Geoff,et al.Adsorption behavior of deep coalbed methane under high temperatures and pressures[J].Geological Journal of China Universities,2013,19(4):648–654.
• [22]郭恒,张群.高煤级Ⅲ无烟煤吸附甲烷的特征及其机制[J].煤田地质与勘探,2014,42(2):45–49.GUO Heng,ZHANG Qun.Characteristics and mechanism of adsorbed methane in high rankⅢanthracite[J].Coal Geology&Exploration,2014,42(2):45–49.
• [23]刘胖.中高阶烟煤对甲烷的吸附/解吸特征研究[D].西安:西安科技大学,2010:54–60.
• [24]杜玉娥.煤的孔隙特征对煤层气解吸的影响[D].西安:西安科技大学,2010:59–67.

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