二氧化碳驱替煤层甲烷的试验研究
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摘要
煤层甲烷的持续抽采会导致煤层甲烷压力的下降。向煤层中注入二氧化碳,可以提高煤层孔隙压力,驱替煤层甲烷。为研究二氧化碳驱替煤层甲烷的可行性,在实验室进行了二氧化碳驱替煤层甲烷的研究。通过研究发现,驱替排采的甲烷产出率明显优于自然排采。因此,可以采用二氧化碳驱替煤层甲烷的方法提高甲烷抽采率。驱替排采对完整煤样和破碎煤样甲烷产出效率的影响不同,破碎煤样的驱替速度较快,而完整煤样的驱替效率较高。因此,在利用二氧化碳驱替不同煤体的甲烷时,要选择合理的驱替方案。
The methane pressure will decline in coal seams,due to the duration extraction of methane. Injecting carbon dioxide in coal seams that can increase pore pressure and displace methane. The displacement experiments were performed in laboratory to investigate the feasibility of that injecting carbon dioxide to displace methane in coal seams. The experimental results showed that the displacement recovery is obviously better than conventional CBM recovery. Therefore,injecting carbon dioxide to displace methane can increase the efficiency of methane extraction. In addition,the effect of displacement recovery on the production of methane in intact and fractured specimens are different. The displacement rate was faster in fractured specimens. The displacement efficiency was higher in intact specimens. Therefore,when injecting carbon dioxide to displace methane in different type of coal seams,it was important to select the suitable injection schedule for displacement.
The methane pressure will decline in coal seams,due to the duration extraction of methane. Injecting carbon dioxide in coal seams that can increase pore pressure and displace methane. The displacement experiments were performed in laboratory to investigate the feasibility of that injecting carbon dioxide to displace methane in coal seams. The experimental results showed that the displacement recovery is obviously better than conventional CBM recovery. Therefore,injecting carbon dioxide to displace methane can increase the efficiency of methane extraction. In addition,the effect of displacement recovery on the production of methane in intact and fractured specimens are different. The displacement rate was faster in fractured specimens. The displacement efficiency was higher in intact specimens. Therefore,when injecting carbon dioxide to displace methane in different type of coal seams,it was important to select the suitable injection schedule for displacement.
引文
[1]万吉业.水驱油田的驱替系列及其应用(Ⅱ)[J].石油勘探与开发,1983(1):69-77.Wan Jiye. Displacement series of water drive oilfield and its appli-cation(Ⅱ)[J]. Petroleum Exploration and Development,1983(1):69-77.
[2]孔令荣,曲志浩,万发宝,等.砂岩微观孔隙模型两相驱替实验[J].石油勘探与开发,1991(4):79-85.Kong Lingrong,Qu Zhihao,Wan Fabao,et al. Experiments of twofluid phase displacement in sandstone micromodels[J]. PetroleumExploration and Development,1991(4):79-85.
[3]沈平平,陈兴隆,秦积舜. CO2驱替实验压力变化特性[J].石油勘探与开发,2010,37(2):211-215.Shen Pingping,Chen Xinglong,Qin Jishun. Pressure characteristicsin CO2flooding experiments[J]. Petroleum Exploration and Devel-opment,2010,37(2):211-215.
[4]马志宏,郭勇义,吴世跃.注入二氧化碳及氮气驱替煤层气机理的实验研究[J].太原理工大学学报,2001,32(4):335-338.Ma Zhihong,Guo Yongyi,Wu Shiyue. An experimental study ofmechanism of exploiting coal-bed methane by injecting carbon di-oxide or nitrogen[J]. Journal of Taiyuan University of Technology,2001,32(4):335-338.
[5]于洪观,范维唐,孙茂远,等.高压下煤对CH4/CO2二元气体吸附等温线的研究[J].煤炭转化,2005,28(1):43-47.Yu Hongguan,Fan Weitang,Sun Maoyuan,et al. Study on adsorp-tion isotherm of CH4/CO2binary mixtures on coal under high pres-sure[J]. Coal Conversion,2005,28(1):43-47.
[6]周来,冯启言,秦勇. CO2和CH4在煤基质表面竞争吸附的热力学分析[J].煤炭学报,2011,36(8):1307-1311.Zhou Lai,Feng Qiyan,Qin Yong. Thermodynamic analysis of com-petitive adsorption of CO2and CH4on coal matrix[J]. Journal ofChina Coal Society,2011,36(8):1307-1311.
[7] Duan S,Min G,Du X,et al. Adsorption equilibrium of CO2andCH4and their mixture on Sichuan Basin Shale[J]. Energy&Fu-els,2016,30(3):439-446.
[8]王立国.注气驱替深部煤层CH4实验及驱替后特征痕迹研究[D].徐州:中国矿业大学,2013.
[9]张文勇,倪小明,王延斌.注CO2与煤中矿物反应渗透率变化规律[J].煤炭学报,2015,40(5):1087-1092.Zhang Wenyong,Ni Xiaoming,Wang Yanbin. Law of permeabilityof CO2and coal in response to permeability[J]. Journal of ChinaCoal Society,2015,40(5):1087-1092.
[10]孙可明.低渗透煤层气开采与注气增产流固耦合理论及其应用[D].阜新:辽宁工程技术大学,2004.
[11] Sander R,Connell L D,Pan Z,et al. Core flooding experiments ofCO2,enhanced coalbed methane recovery[J]. International Journalof Coal Geology,2014(1):113-125.
[12] Mazumder S,Wolf K H. CO2and flue gas core flooding experi-ments for enhanced coalbed methane[J]. International Journal ofCoal Geology,2008(4):42-48.
[13] Zhou F,Hussain F,Cinar Y. Injecting pure N2and CO2to coal forenhanced coalbed methane:experimental observations and numeri-cal simulation[J]. International Journal of Coal Geology,2013(5):53-62.
[14] Mazumder S,Wolf K H A A,Hemert P V,et al. Laboratory experi-ments on environmental friendly means to improve coalbed methaneproduction by carbon dioxide/flue gas injection[J]. Transport inPorous Media,2008,75(1):63-92.
[15] Jessen K,Tang G Q,Kovscek A R. Laboratory and simulation in-vestigation of enhanced coalbed methane recovery by gas injection[J]. Transport in Porous Media,2008,73(2):141-159.
[2]孔令荣,曲志浩,万发宝,等.砂岩微观孔隙模型两相驱替实验[J].石油勘探与开发,1991(4):79-85.Kong Lingrong,Qu Zhihao,Wan Fabao,et al. Experiments of twofluid phase displacement in sandstone micromodels[J]. PetroleumExploration and Development,1991(4):79-85.
[3]沈平平,陈兴隆,秦积舜. CO2驱替实验压力变化特性[J].石油勘探与开发,2010,37(2):211-215.Shen Pingping,Chen Xinglong,Qin Jishun. Pressure characteristicsin CO2flooding experiments[J]. Petroleum Exploration and Devel-opment,2010,37(2):211-215.
[4]马志宏,郭勇义,吴世跃.注入二氧化碳及氮气驱替煤层气机理的实验研究[J].太原理工大学学报,2001,32(4):335-338.Ma Zhihong,Guo Yongyi,Wu Shiyue. An experimental study ofmechanism of exploiting coal-bed methane by injecting carbon di-oxide or nitrogen[J]. Journal of Taiyuan University of Technology,2001,32(4):335-338.
[5]于洪观,范维唐,孙茂远,等.高压下煤对CH4/CO2二元气体吸附等温线的研究[J].煤炭转化,2005,28(1):43-47.Yu Hongguan,Fan Weitang,Sun Maoyuan,et al. Study on adsorp-tion isotherm of CH4/CO2binary mixtures on coal under high pres-sure[J]. Coal Conversion,2005,28(1):43-47.
[6]周来,冯启言,秦勇. CO2和CH4在煤基质表面竞争吸附的热力学分析[J].煤炭学报,2011,36(8):1307-1311.Zhou Lai,Feng Qiyan,Qin Yong. Thermodynamic analysis of com-petitive adsorption of CO2and CH4on coal matrix[J]. Journal ofChina Coal Society,2011,36(8):1307-1311.
[7] Duan S,Min G,Du X,et al. Adsorption equilibrium of CO2andCH4and their mixture on Sichuan Basin Shale[J]. Energy&Fu-els,2016,30(3):439-446.
[8]王立国.注气驱替深部煤层CH4实验及驱替后特征痕迹研究[D].徐州:中国矿业大学,2013.
[9]张文勇,倪小明,王延斌.注CO2与煤中矿物反应渗透率变化规律[J].煤炭学报,2015,40(5):1087-1092.Zhang Wenyong,Ni Xiaoming,Wang Yanbin. Law of permeabilityof CO2and coal in response to permeability[J]. Journal of ChinaCoal Society,2015,40(5):1087-1092.
[10]孙可明.低渗透煤层气开采与注气增产流固耦合理论及其应用[D].阜新:辽宁工程技术大学,2004.
[11] Sander R,Connell L D,Pan Z,et al. Core flooding experiments ofCO2,enhanced coalbed methane recovery[J]. International Journalof Coal Geology,2014(1):113-125.
[12] Mazumder S,Wolf K H. CO2and flue gas core flooding experi-ments for enhanced coalbed methane[J]. International Journal ofCoal Geology,2008(4):42-48.
[13] Zhou F,Hussain F,Cinar Y. Injecting pure N2and CO2to coal forenhanced coalbed methane:experimental observations and numeri-cal simulation[J]. International Journal of Coal Geology,2013(5):53-62.
[14] Mazumder S,Wolf K H A A,Hemert P V,et al. Laboratory experi-ments on environmental friendly means to improve coalbed methaneproduction by carbon dioxide/flue gas injection[J]. Transport inPorous Media,2008,75(1):63-92.
[15] Jessen K,Tang G Q,Kovscek A R. Laboratory and simulation in-vestigation of enhanced coalbed methane recovery by gas injection[J]. Transport in Porous Media,2008,73(2):141-159.