寺河井田煤层气产能分布特征及影响因素分析
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摘要
为研究寺河井田煤层气产能分布特征及其影响因素,以气井整个生命周期不同阶段的时间节点为分类标准,利用统计分析法对其历史排采数据进行归类,追踪气、水随时空变化特征,并从地质及工程两方面分析产能分布主控因素。结果表明:随着排采时间延长,煤层气井高产区范围逐渐扩大,低产区范围逐渐缩小,产能分布区域差异性大;构造、含气性、渗透率是产能的主控地质因素,含气性与产能分布一致度较高,构造通过影响含气性间接控制产能分布,渗透率差别较大时,产能与渗透率相关性显著;压裂、储层伤害、井下采掘活动是产能的工程影响因素,特别是储层伤害和井下采掘活动对产能影响较大,布井时需合理规划井上下联合开采时间关系,使气井达到产能最优化。
This paper studies the distributions and its influencing factors of coalbed methane productivity in Sihe mine field using statistical analysis on historical drainage data.Time nodes in different stages of the whole gas well life cycle are used as the classification method.The changes of gas and water with time and space are also tracked.The main controlling factors for productivity distributions are studied geographically and engineeringly.The results show that the range of high production area of coalbed methane wells gradually expands with drainage time while the range of low production area gradually decreases.The productivity distribution at different regions are varied significant.Geographic structure,gas-bearing properties,and permeability are the main geological factors that control the gas productivity.The gas-bearing and productivity distribution are highly correlated and structure influences gas-bearing,thus affects productivity distribution.When permeability difference is great,productivity and permeability are significantly correlated. Furthermore,fracturing,reservoir damage,and underground mining activities are engineering factors that affect productivity,especially reservoir damage and underground mining activities.To optimize the productivity of gas wells,planning the time order for upper and lower seam injoint production is significantly important.
This paper studies the distributions and its influencing factors of coalbed methane productivity in Sihe mine field using statistical analysis on historical drainage data.Time nodes in different stages of the whole gas well life cycle are used as the classification method.The changes of gas and water with time and space are also tracked.The main controlling factors for productivity distributions are studied geographically and engineeringly.The results show that the range of high production area of coalbed methane wells gradually expands with drainage time while the range of low production area gradually decreases.The productivity distribution at different regions are varied significant.Geographic structure,gas-bearing properties,and permeability are the main geological factors that control the gas productivity.The gas-bearing and productivity distribution are highly correlated and structure influences gas-bearing,thus affects productivity distribution.When permeability difference is great,productivity and permeability are significantly correlated. Furthermore,fracturing,reservoir damage,and underground mining activities are engineering factors that affect productivity,especially reservoir damage and underground mining activities.To optimize the productivity of gas wells,planning the time order for upper and lower seam injoint production is significantly important.
引文
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[8]徐涛,苏现波,倪小明.沁南地区潘庄区块煤层气井产能主控因素研究[J].河南理工大学学报:自然科学版,2013,32(1):25-29.XU Tao,SUN Xianbo,NI xiaoming.Study on CBM production main controlling factors of Qinnan Panzhuang block[J].Journal of Hennan Polytechnic University:Natural Science,2013,32(1):25-29.
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[10]陶树,汤达祯,许浩,等.沁南煤层气井产能影响因素分析及开发建议[J].煤炭学报,2011,36(2):194-198.TAO Shu,TANG Dazhen,XU Hao,et al.Analysis on influence factors of coalbed methane wells productivity and development proposals in southern Qinshui Basin[J].Journal of China Coal Society,2011,36(2):194-198.
[11]康园园,邵先杰,王彩凤.高-中煤阶煤层气井生产特征及影响因素分析:以樊庄、韩城矿区为例[J].石油勘探与开发,2012,39(6):728-732.KANG Yuanyuan,SHAO Xianjie,WANG Caifeng.Production characteristics and affecting factors of high-mid rank coalbed methane wells:Taking Fanzhuang and Hancheng mining areas as examples[J].Petroleum Exploration and Development,2012,39(6):728-732.
[12]张志义.晋煤集团高瓦斯矿井煤层气抽采及利用效果[J].煤炭技术,2008,27(11):91-92.ZHANG Zhiyi.Effect of withdrawal and application of coal seam gas in high cgassy mine of Jincheng coal industry group[J].Coal Technology,2008,27(11):91-92.
[13]陈召英,王保玉,郝海金,等.寺河区块煤层气井排采特征及抽采效果分析[J].煤炭科学技术,2017,45(7):100-105.CHEN Zhaoying,WANG Baoyu,HAO Haijin,et al.Analysis on drainage features and drainage effect of coalbed methane well in Sihe Block[J].Coal Science and Technology,2017,45(7):100-105.
[14]李国富,侯泉林.沁水盆地南部煤层气井排采动态过程与差异性[J].煤炭学报,2012,37(5):798-803.LI Guofu,HOU Quanlin.Dynamic process and difference of coalbed methane wells production in southern Qinshui Basin[J].Journal of China Coal Society,2012,37(5):798-803.
[15]孟艳军,汤达祯,李治平,等.高煤阶煤层气井不同排采阶段渗透率动态变化特征与控制机理[J].油气地质与采收率,2015,22(2):66-71.MENG Yanjun,TANG Dazhen,LI Zhiping,et al.Dynamic variation characteristics and mechanism of permeability in highrank CBM wells at different drainage and production stages[J].Petroleum Geology and Recovery Efficiency,2015,22(2):66-71.
[16]杨秀春,接铭训,王国强.潘河煤层气试验区产能影响因素分析[J].天然气工业,2008,28(3):99-101.YANG Xiuchun,JIE Mingxun,WANG Guoqiang.Influencing factors on CBM productivity in Panhe trial production area[J].Natural Gas Industry,2008,28(3):99-101.
[17]吴光亮.三维地震探采对比及再分析初探[J].中国煤炭地质,2008,20(6):81-83.WU Guangliang.Correlation and reanalyzing of 3D seismic prospecting and mining information[J].Coal Geology of China,2008,20(6):81-83.
[18]罗政,程政,王晓龙,等.贵州煤储层异常表皮系数的研究[J].煤炭技术,2017,36(8):105-107.LUO Zheng,CHENG Zheng,WANG Xiaolong,et al.Research on abnormal skin factor of Guizhou Coal Reservoir[J].Coal Technology,2017,36(8):105-107.
[19]李国富,李贵红,刘刚.晋城矿区典型区煤层气地面抽采效果分析[J].煤炭学报,2014,39(9):1932-1937.LI Guofu,LI Guihong,LIU Gang.Analysis on the ground extraction effect of coal-bed methane at typical area in Jincheng,China[J].Journal of China Coal Society,2014,39(9):1932-1937.
[20]龙威成,孙四清,李国富.煤矿区地面煤层气抽采效果评价方法探讨:以寺河煤矿某区块为例[J].煤田地质与勘探,2016,44(6):55-63.LONG Weicheng,SUN Siqing,LI Guofu.Evaluation method of coalbed methane surface drainage effect in coal mines:Take a block of Sihe mine as an example[J].Coal Geology&Exploration,2016,44(6):55-63.
[21]张光波,祁空军,于家盛,等.煤矿采掘对煤层气开发影响模式探讨[J].中国煤层气,2018,15(5):40-43.ZHANG Guangbo,QI Kongjun,YU Jiasheng,et al,Discussion on influence mode of coal mining on CBM development[J].China Coalbed Methane,2018,15(5):40-43.
[2]邵先杰,董新秀,汤达祯,等.韩城矿区煤层气中低产井治理技术与方法[J].天然气地球科学,2014,25(3):435-443.SHAO Xianjie,DONG Xinxiu,TANG Dazhen,et al.Teatment technology and method of low-to-moderate production coalbed methane wells in Hancheng mining[J].Natural Gas Geoscience,2014,25(3):435-443.
[3]刘世奇,桑树勋,李梦溪,等.樊庄区块煤层气井产能差异的关键地质影响因素及其控制机理[J].煤炭学报,2013,38(2):277-283.LIU Shiqi,SANG Shuxun,LI Mengxi,et al.Key geologic factors and control mechanisms of water production and gas production divergences between CBM wells in Fanzhuang block[J].Journal of China Coal Society,2013,38(2):277-283.
[4]张培河,刘钰辉,王正喜,等.基于生产数据分析的沁水盆地南部煤层气井产能控制地质因素研究[J].天然气地球科学,2011,22(5):909-914.ZHANG Peihe,LIU Yuhui,WANG Zhengxi,et al.Geological factors of production control of CBM well in South Qinshui Basin[J].Natural Gas Geoscience,2011,22(5):909-914.
[5]韩贤军,杨焦生.沁水盆地南部煤层气产能特征及影响因素分析[J].科学技术与工程,2013,13(33):9940-9945.HAN Xianjun,YANG Jiaosheng.Coalbed methane deliverability characteristic and its controlling factors in southern Qinshui basin[J].Science Technology and Engineering,2013,13(33):9940-9945.
[6]刘升贵,陈含,彭智高,等.沁水盆地煤层气产能差异及采收率[J].辽宁工程技术大学学报:自然科学版,2013,32(6):721-724.LIU Shenggui,CHEN Han,PENG Zhigao,et al.Coalbed methane productivity differences and gas recovery in Qinshui Basin[J].Journal of Liaoning Technical University:Natural Science,2013,32(6):721-724.
[7]娄剑青.影响煤层气井产量的因素分析[J].天然气工业,2004,24(4):62-64.LOU Jianqing.Factors of influencing production of coal-bed gas well[J].Natural Gas Industry,2004,24(4):62-64.
[8]徐涛,苏现波,倪小明.沁南地区潘庄区块煤层气井产能主控因素研究[J].河南理工大学学报:自然科学版,2013,32(1):25-29.XU Tao,SUN Xianbo,NI xiaoming.Study on CBM production main controlling factors of Qinnan Panzhuang block[J].Journal of Hennan Polytechnic University:Natural Science,2013,32(1):25-29.
[9]刘刚.樊庄区块煤层气地质特征及产能分析[D].徐州:中国矿业大学,2017.
[10]陶树,汤达祯,许浩,等.沁南煤层气井产能影响因素分析及开发建议[J].煤炭学报,2011,36(2):194-198.TAO Shu,TANG Dazhen,XU Hao,et al.Analysis on influence factors of coalbed methane wells productivity and development proposals in southern Qinshui Basin[J].Journal of China Coal Society,2011,36(2):194-198.
[11]康园园,邵先杰,王彩凤.高-中煤阶煤层气井生产特征及影响因素分析:以樊庄、韩城矿区为例[J].石油勘探与开发,2012,39(6):728-732.KANG Yuanyuan,SHAO Xianjie,WANG Caifeng.Production characteristics and affecting factors of high-mid rank coalbed methane wells:Taking Fanzhuang and Hancheng mining areas as examples[J].Petroleum Exploration and Development,2012,39(6):728-732.
[12]张志义.晋煤集团高瓦斯矿井煤层气抽采及利用效果[J].煤炭技术,2008,27(11):91-92.ZHANG Zhiyi.Effect of withdrawal and application of coal seam gas in high cgassy mine of Jincheng coal industry group[J].Coal Technology,2008,27(11):91-92.
[13]陈召英,王保玉,郝海金,等.寺河区块煤层气井排采特征及抽采效果分析[J].煤炭科学技术,2017,45(7):100-105.CHEN Zhaoying,WANG Baoyu,HAO Haijin,et al.Analysis on drainage features and drainage effect of coalbed methane well in Sihe Block[J].Coal Science and Technology,2017,45(7):100-105.
[14]李国富,侯泉林.沁水盆地南部煤层气井排采动态过程与差异性[J].煤炭学报,2012,37(5):798-803.LI Guofu,HOU Quanlin.Dynamic process and difference of coalbed methane wells production in southern Qinshui Basin[J].Journal of China Coal Society,2012,37(5):798-803.
[15]孟艳军,汤达祯,李治平,等.高煤阶煤层气井不同排采阶段渗透率动态变化特征与控制机理[J].油气地质与采收率,2015,22(2):66-71.MENG Yanjun,TANG Dazhen,LI Zhiping,et al.Dynamic variation characteristics and mechanism of permeability in highrank CBM wells at different drainage and production stages[J].Petroleum Geology and Recovery Efficiency,2015,22(2):66-71.
[16]杨秀春,接铭训,王国强.潘河煤层气试验区产能影响因素分析[J].天然气工业,2008,28(3):99-101.YANG Xiuchun,JIE Mingxun,WANG Guoqiang.Influencing factors on CBM productivity in Panhe trial production area[J].Natural Gas Industry,2008,28(3):99-101.
[17]吴光亮.三维地震探采对比及再分析初探[J].中国煤炭地质,2008,20(6):81-83.WU Guangliang.Correlation and reanalyzing of 3D seismic prospecting and mining information[J].Coal Geology of China,2008,20(6):81-83.
[18]罗政,程政,王晓龙,等.贵州煤储层异常表皮系数的研究[J].煤炭技术,2017,36(8):105-107.LUO Zheng,CHENG Zheng,WANG Xiaolong,et al.Research on abnormal skin factor of Guizhou Coal Reservoir[J].Coal Technology,2017,36(8):105-107.
[19]李国富,李贵红,刘刚.晋城矿区典型区煤层气地面抽采效果分析[J].煤炭学报,2014,39(9):1932-1937.LI Guofu,LI Guihong,LIU Gang.Analysis on the ground extraction effect of coal-bed methane at typical area in Jincheng,China[J].Journal of China Coal Society,2014,39(9):1932-1937.
[20]龙威成,孙四清,李国富.煤矿区地面煤层气抽采效果评价方法探讨:以寺河煤矿某区块为例[J].煤田地质与勘探,2016,44(6):55-63.LONG Weicheng,SUN Siqing,LI Guofu.Evaluation method of coalbed methane surface drainage effect in coal mines:Take a block of Sihe mine as an example[J].Coal Geology&Exploration,2016,44(6):55-63.
[21]张光波,祁空军,于家盛,等.煤矿采掘对煤层气开发影响模式探讨[J].中国煤层气,2018,15(5):40-43.ZHANG Guangbo,QI Kongjun,YU Jiasheng,et al,Discussion on influence mode of coal mining on CBM development[J].China Coalbed Methane,2018,15(5):40-43.