西山煤田古交矿区煤层气分布模式及开发效果评价
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摘要
为揭示古交矿区煤层气分布规律及其主控因素,综合野外地质勘查、煤矿采掘地质、煤层气井相关资料及煤心测试数据等资料,讨论了构造演化、构造形态、断裂分布、埋深、煤体结构、煤层厚度、直接顶板性质等因素对煤层气分布的影响。结果表明:构造条件和埋深是控制矿区内煤层气分布规律的主因,并据此将矿区划分为平缓单斜浅埋、平缓单斜深埋、陡峭单斜和复杂褶皱4种煤层气分布模式,平缓单斜浅埋区和平缓单斜深埋区为煤层气富集有利区。平缓单斜浅埋模式下,埋深小、渗透性好是煤层气井高产的有利条件;平缓单斜深埋模式下,埋深小、含气量高有利于煤层气井高产。
In order to reveal the distribution law and the main controlled factors of the coalbed methane in Gujiao Mining Area,comprehensive field geological survey,mining and excavation geology,coalbed methane well related information as well as coal core test data and other information,the paper had a discussion on the structure evolution,structure morphology,crack distribution,depth,coal structure,seam thickness,direct roof property and other factors affected to the coalbed methane distribution. The results showed that the structure condition and the depth would be the main factor to control the distribution law of the coalbed methane within the mining area. Thus the mining area was divided to four coalbed methane distribution modes of the gently-dipping monoclinal shallow overburden,gently-dipping monoclinal deep overburden,steep monoclinal and complicated fold. The gently-dipping monoclinal shallow overburden and gently-dipping monoclinal deep overburden would be the enrichment favorable zone of the coalbed methane. Under the mode of the gently-dipping monoclinal shallow overburden,the shallow depth and good permeability would be the favorable condition to the high production of the coalbed methane well. Under the mode of the gently-dipping monoclinal shallow overburden,the shallow depth and high gas content would be favorable to the high production of the coalbed methane well.
In order to reveal the distribution law and the main controlled factors of the coalbed methane in Gujiao Mining Area,comprehensive field geological survey,mining and excavation geology,coalbed methane well related information as well as coal core test data and other information,the paper had a discussion on the structure evolution,structure morphology,crack distribution,depth,coal structure,seam thickness,direct roof property and other factors affected to the coalbed methane distribution. The results showed that the structure condition and the depth would be the main factor to control the distribution law of the coalbed methane within the mining area. Thus the mining area was divided to four coalbed methane distribution modes of the gently-dipping monoclinal shallow overburden,gently-dipping monoclinal deep overburden,steep monoclinal and complicated fold. The gently-dipping monoclinal shallow overburden and gently-dipping monoclinal deep overburden would be the enrichment favorable zone of the coalbed methane. Under the mode of the gently-dipping monoclinal shallow overburden,the shallow depth and good permeability would be the favorable condition to the high production of the coalbed methane well. Under the mode of the gently-dipping monoclinal shallow overburden,the shallow depth and high gas content would be favorable to the high production of the coalbed methane well.
引文
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[15] TAO S,TANG D Z,XU H,et al.Factors controlling high-yield coalbed methane vertical wells in the Fanzhuang block,southern Qinshui basin[J]. International Journal of Coal Geology,2014,134-135:38-45.
[16]夏鹏.西山煤田古交矿区煤层气富集规律及产能主控因素研究[D].太原:太原理工大学,2017.
[17] XIA Peng,ZENG Fangui,SONG Xiaoxia,et al.Geologic structural controls on coalbed methane content of the No.8 coal seam,Gujiao Mining Area, Shanxi, China[J]. Applied Ecology and Environmental Research,2017,15(1):51-68.
[18] SHURR G W,RIDGLEY J L.Unconventional shallow biogenic gas system[J].AAPG Bulletin,2002,86(11):1939-1969.
[19]邵龙义,侯海海,唐跃,等.中国煤层气勘探开发战略接替区优选[J].天然气工业,2015,35(3):1-11.SHAO Longyi,HOU Haihai,TANG Yue,et al. Selection of strategic relay areas of CBM exploration and development in China[J].Natural Gas Industry,2015,35(3):1-11.
[20]王勃,姜波,郭志斌,等.沁水盆地西山煤田煤层气成藏特征[J].天然气地球科学,2007,18(4):565-567.WANG Bo,JIANG Bo,GUO Zhibin,et al.Coalbed methane reservoir-forming characteristics of Xishan Coalfield,Qinshui Basin[J].Natural Gas Geoscience,2007,18(4):565-567.
[21]逄建东,王震,姚长华,等.岩浆活动对西山煤田煤层含气量的控制作用[J].科技通报,2016,32(3):29-33.PANG Jiandong,WANG Zhen,YAO Changhua,et al. The control action of magmatic activity to the gas content of coal in Xishan Coalfield[J].Bulletin of Science and Technology,2016,32(3):29-33.
[22] YAO Y B,LIU D M,XIE S B. Quantitative characterization of methane adsorption on coal using a low-field NMR relaxation methos[J]. International Journal of Coal Geology,2014,131:32-40.
[23] FAIZ M,SAGHAFI A,SHERWOOD N,et al.The influence of petrological properties and burial history on coal seam methane reservoir characterization,Sydney Basin,Australia[J].International Journal of Coal Geology,2007,70:193-208.
[24] CAI Y D,LIU D M,ZHANG K M,et al.Preliminary evaluation of gas content of the No. 2 coal seam in the Yanchuannan area,southeast Ordos Basin,China[J]. Journal of Petroleum Science and Engineering,2014,122:675-689.
[25] PINETOWN K L.Regional coal seam gas distribution and burial history of the Hunter coalfield,Sydney basin[J]. Australian Journal of Earth Sciences,2014,61(3):409-426.
[26]王红岩.山西沁水盆地高煤阶煤层气成藏特征及构造控制作用[D].北京:中国地质大学(北京),2005.
[27]苏现波,林晓英,柳少波,等.煤层气藏边界及其封闭机理[J].科学通报,2005,50(S1):117-120.SU Xianbo,LIN Xiaoying,LIU Shaobo,et al. Coalbed methane reservoir boundaries and sealing mechanism[J]. Chinese Science Bulletin,2005,50(S1):117-120.
[28]王国义,卫强强,宋晓夏,等.太原西山古交区块煤层气井水力压裂效果评价[J].煤炭科学技术,2018,46(6):155-159.WANG Guoyi,WEI Qiangqiang,SONG Xxiaoxia,et al.Evaluation of hydraulic fracturing effect of CBM well in Gujiao Mining Area of Xishan Coalfield Taiyuan[J]. Coal Science and Technology,2018,46(6):155-159.
[29] DENG J L.Introduction to grey system theory[J].The Journal of Grey System,1989,1:1-24.
[2] BUSTIN R M,CLARKSON C R. Geological controls on coalbed methane reservoir capacity and gas content[J]. International Journal of Coal Geology,1998,38:3-26.
[3] ANNA L O.Groundwater flow associated with coalbed gas production,Ferron sandstone,east-central Utah[J]. International Journal of Coal Geology,2003,56:69-95.
[4] PAUL S,CHATTERJEE R.Mapping of cleats and fractures as an indicator of in-situ stress orientation,Jharia Coalfield,India[J].International Journal of Coal Geology,2011,88:113-122.
[5]赵庆波,李五忠,孙粉锦.中国煤层气分布特征及高产富集因素[J].石油学报,1997,18(4):1-6.ZHAO Qingbo,LI Wuzhong,SUN Fenjin.Distribution and accumulation regularity for coalbed methane in China[J]. Acta Petrolei Sinica,1997,18(4):1-6.
[6] ZHAO J Z,SHI B H.Division of coalbed methane-enriched units in the Qinshuibasin[J]. Chinese Science Bulletin,2005,50(S):140-145.
[7]傅小康,霍永忠,叶建平.低煤阶煤层气富集模式初探[J].中国煤层气,2006,3(3):24-26.FU Xiaokang,HUO Yongzhong,YE Jianping. Study on CBM enrichment mode of low rank coal in China[J].China Coalbed Methane,2006,3(3):24-26.
[8]孙平,王勃,孙粉锦,等.中国低煤阶煤层气成藏模式研究[J].石油学报,2009,30(5):648-653.SUN Ping,WANG Bo,SUN Fenjin,et al.Research on reservoir patterns of low-rank coal-bed methane in China[J]. Acta Petrolei Sinica,2009,30(5):648-653.
[9]刘大锰,王颖晋,蔡益栋.低阶煤层气富集主控地质因素与成藏模式分析[J].煤炭科学技术,2018,46(6):1-8.LIU Dameng,WANG Yinjin,CAI Yidong.Analysis of main geological controls on coalbed methane enrichment and accumulation patterns in low rank coals[J].Coal Science and Technology,2018,46(6):1-8.
[10]闫宝珍,汪延斌,丰庆泰,等.基于地质主控因素的沁水盆地煤层气富集划分[J].煤炭学报,2008,33(10):1102-1106.YAN Baozhen,WANG Yanbin,FENG Qingtai,et al. Coalbed methane enrichment classifications of Qinshui basin based on geological key controlling factors[J]. Journal of China Coal Society,2008,33(10):1102-1106.
[11]宋岩,柳少波,马行陟,等.中高煤阶煤层气富集高产区形成模式与地质评价方法[J].地学前缘,2016,23(3):1-9.SONG Yan,LIU Shaobo,MA Buzhi,et al. Research on formation model and geological evaluation method of the middle to high rank coalbed methane enrichment and high production area[J]. Earth Science Frontiers,2016,23(3):1-9.
[12]李勇,汤达祯,许浩,等.柳林矿区煤层含气量主控因素研究[J].煤炭科学技术,2014,42(5):95-97,102.LI Yong,TANG Dazhen,XU Hao,et al.Study on main control factors affecting gas content of coal seams in Liulin mining area[J].Coal Science and Technology,2014,42(5):95-97,102.
[13] LI X,FU X H,YANG X S,et al.Coalbed methane accumulation and dissipation patterns:A case study of the Junggar basin,NW China[J].Journal of Asian Earth Sciences,2018,160:12-26.
[14] YAO Y B,LIU D M,YAN T T.Geological and hydrogeological controls on the accumulation of coalbed methane in the Weibei field,southeastern Ordos basin[J]. International Journal of Coal Geology,2014,121:148-159.
[15] TAO S,TANG D Z,XU H,et al.Factors controlling high-yield coalbed methane vertical wells in the Fanzhuang block,southern Qinshui basin[J]. International Journal of Coal Geology,2014,134-135:38-45.
[16]夏鹏.西山煤田古交矿区煤层气富集规律及产能主控因素研究[D].太原:太原理工大学,2017.
[17] XIA Peng,ZENG Fangui,SONG Xiaoxia,et al.Geologic structural controls on coalbed methane content of the No.8 coal seam,Gujiao Mining Area, Shanxi, China[J]. Applied Ecology and Environmental Research,2017,15(1):51-68.
[18] SHURR G W,RIDGLEY J L.Unconventional shallow biogenic gas system[J].AAPG Bulletin,2002,86(11):1939-1969.
[19]邵龙义,侯海海,唐跃,等.中国煤层气勘探开发战略接替区优选[J].天然气工业,2015,35(3):1-11.SHAO Longyi,HOU Haihai,TANG Yue,et al. Selection of strategic relay areas of CBM exploration and development in China[J].Natural Gas Industry,2015,35(3):1-11.
[20]王勃,姜波,郭志斌,等.沁水盆地西山煤田煤层气成藏特征[J].天然气地球科学,2007,18(4):565-567.WANG Bo,JIANG Bo,GUO Zhibin,et al.Coalbed methane reservoir-forming characteristics of Xishan Coalfield,Qinshui Basin[J].Natural Gas Geoscience,2007,18(4):565-567.
[21]逄建东,王震,姚长华,等.岩浆活动对西山煤田煤层含气量的控制作用[J].科技通报,2016,32(3):29-33.PANG Jiandong,WANG Zhen,YAO Changhua,et al. The control action of magmatic activity to the gas content of coal in Xishan Coalfield[J].Bulletin of Science and Technology,2016,32(3):29-33.
[22] YAO Y B,LIU D M,XIE S B. Quantitative characterization of methane adsorption on coal using a low-field NMR relaxation methos[J]. International Journal of Coal Geology,2014,131:32-40.
[23] FAIZ M,SAGHAFI A,SHERWOOD N,et al.The influence of petrological properties and burial history on coal seam methane reservoir characterization,Sydney Basin,Australia[J].International Journal of Coal Geology,2007,70:193-208.
[24] CAI Y D,LIU D M,ZHANG K M,et al.Preliminary evaluation of gas content of the No. 2 coal seam in the Yanchuannan area,southeast Ordos Basin,China[J]. Journal of Petroleum Science and Engineering,2014,122:675-689.
[25] PINETOWN K L.Regional coal seam gas distribution and burial history of the Hunter coalfield,Sydney basin[J]. Australian Journal of Earth Sciences,2014,61(3):409-426.
[26]王红岩.山西沁水盆地高煤阶煤层气成藏特征及构造控制作用[D].北京:中国地质大学(北京),2005.
[27]苏现波,林晓英,柳少波,等.煤层气藏边界及其封闭机理[J].科学通报,2005,50(S1):117-120.SU Xianbo,LIN Xiaoying,LIU Shaobo,et al. Coalbed methane reservoir boundaries and sealing mechanism[J]. Chinese Science Bulletin,2005,50(S1):117-120.
[28]王国义,卫强强,宋晓夏,等.太原西山古交区块煤层气井水力压裂效果评价[J].煤炭科学技术,2018,46(6):155-159.WANG Guoyi,WEI Qiangqiang,SONG Xxiaoxia,et al.Evaluation of hydraulic fracturing effect of CBM well in Gujiao Mining Area of Xishan Coalfield Taiyuan[J]. Coal Science and Technology,2018,46(6):155-159.
[29] DENG J L.Introduction to grey system theory[J].The Journal of Grey System,1989,1:1-24.
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