松藻矿区地下水动力场特征及其对煤层气富集的影响
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摘要
松藻矿区是我国煤层气资源富集区之一。为揭示松藻矿区地下水对煤层气富集影响,利用煤田勘查获取的水文地质资料,基于含水层结构、水化学特征、抽水资料的系统分析,阐明了含煤地层上覆和下伏含水层地下水的空间展布特征,建立了地下水的分布模式,探讨了地下水动力场对煤层气富集的影响。研究表明:松藻矿区含水层和隔水层相互叠置,随着埋深的增加含水性减弱;含煤岩系与上覆、下伏含水层缺乏水力联系,为相互独立的含水系统;上覆长兴组和下伏茅口组地下水动力场呈南高北低展布;地下水动力场有近河流岩溶裂隙渗入型、断层沟通岩溶裂隙补给型、稳定承压弱含水型三种类型,以稳定承压弱含水型为主;含煤岩系的极弱含水性及其与上覆、下伏含水地层缺乏水力联系构成了区内水文地质控气基础,是研究区煤层含气性高的重要控制因素。
Songzao mining area is one of the most abundant coalbed methane resources in China. In order to reveal the characteristics of groundwater and its effect on coalbed methane enrichment in Songzao mining area, the hydrogeological data obtained from coal field exploration, based on the analysis of aquifer structure, water chemistry characteristics and pumping data, the distribution pattern of groundwater was established, and the influence of groundwater dynamic field on coalbed methane enrichment was discussed. The results show that aquifers are overlapped with each other in Songzao mining area, and the water content is weakened with the increase of the buried depth. The coal-bearing rock series and the overlying and underlying aquifers are lack of hydraulic connection and are independent of the water system. There are three types of groundwater dynamic field in Changxing Formation and Lower Maokou Formation, and the groundwater dynamic field has three types: karst fissure infiltration type, fault communication karst fissure recharge type, stable pressure weak water type, stable weakly aquiferous type is dominant, and the weak water-bearing property of coal-bearing rock series and its lack of hydraulic connection with overlying and underlying water-bearing strata constitute the basis of hydrogeological control of gas in the area, is an important control factor.
Songzao mining area is one of the most abundant coalbed methane resources in China. In order to reveal the characteristics of groundwater and its effect on coalbed methane enrichment in Songzao mining area, the hydrogeological data obtained from coal field exploration, based on the analysis of aquifer structure, water chemistry characteristics and pumping data, the distribution pattern of groundwater was established, and the influence of groundwater dynamic field on coalbed methane enrichment was discussed. The results show that aquifers are overlapped with each other in Songzao mining area, and the water content is weakened with the increase of the buried depth. The coal-bearing rock series and the overlying and underlying aquifers are lack of hydraulic connection and are independent of the water system. There are three types of groundwater dynamic field in Changxing Formation and Lower Maokou Formation, and the groundwater dynamic field has three types: karst fissure infiltration type, fault communication karst fissure recharge type, stable pressure weak water type, stable weakly aquiferous type is dominant, and the weak water-bearing property of coal-bearing rock series and its lack of hydraulic connection with overlying and underlying water-bearing strata constitute the basis of hydrogeological control of gas in the area, is an important control factor.
引文
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[15]傅雪海,葛燕燕,梁文庆,等.多层叠置含煤层气系统递进排采的压力控制及流体效应[J].天然气工业,2013,33(11):35–39.FU Xuehai,GE Yanyan,LIANG Wenqing,et al.Pressure control and fluid effect of progressive drainage of multiple superposed CBM system[J].Natural Gas Industry,2013,33(11):35–39.
[16]全国矿产储量委员会.矿区水文地质工程地质勘探规范:GB12719—1991[S].北京:中国标准出版社,1991.
[17]李正根.水文地质学[M].北京:地质出版社,1980.
[18]河南理工大学,重庆地质矿产研究院.重庆市1∶50万煤矿瓦斯地质图说明书[R].重庆:重庆地质矿产研究院,2012.
[19]国土资源部油气资源战略研究中心.全国煤层气资源评价[M].北京:中国大地出版社,2009.
[2]张培河.鹤岗煤田煤层气开发水文地质条件分析[J].煤田地质与勘探,2002,30(2):42–43.ZHANG Peihe.Analysis on hydrogeological conditions for the development of coalbed methane in Hegang coal field[J].Coal Geology&Exploration,2002,30(2):42–43.
[3]秦勇,傅雪海,韦重韬,等.煤层气成藏动力条件及其控藏效应[M].北京:科学出版社,2012.
[4]王怀勐,朱炎铭,李伍,等.煤层气赋存的两大地质控制因素[J].煤炭学报,2011,36(7):1129–1134.WANG Huaimeng,ZHU Yanming,LI Wu,et al.Two major geological controls factors of occurrence characteristics of CBM[J].Journal of China Coal Society,2011,36(7):1129–1134.
[5]秦胜飞,宋岩,唐修义,等.水动力条件对煤层气含量的影响—煤层气滞留水控气论[J].天然气地球科学,2005,16(2):149–152.QIN Shengfei,SONG Yan,TANG Xiuyi,et al.The influence on coal-bed gas content by hydrodynamics:The stagnant groundwater controlling[J].Natural Gas Geoscience,2005,16(2):149–152.
[6]叶建平,武强,王子和.水文地质条件对煤层气赋存的控制作用[J].煤炭学报,2001,26(5):459–462.YE Jianping,WU Qiang,WANG Zihe.Controlled characteristics of hydrogeological conditions on the coalbed methane migration and accumulation[J].Journal of China Coal Society,2001,26(5):459–462.
[7]余林.延川南地区水文地质条件及煤层气成藏[J].煤田地质与勘探,2017,45(2):69–74.YU Lin.Groundwater conditions and relative CBM accumulation feature in Yanchuannan area[J].Coal Geology&Exploration,2017,45(2):69–74.
[8]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):194–98.
[9]秦勇,熊孟辉,易同生,等.论多层叠置独立含煤层气系统—以贵州织金–纳雍煤田水公河向斜为例[J].地质论评,2008,54(1):65–70.QIN Yong,XIONG Menghui,YI Tongsheng,et al.On unattached multiple superposed CBM-bearing system:In a case of Shuigonghe syncline,Zhina coalfield,Guizhou[J].Geological Review,2008,54(1):65–70.
[10]杨兆彪,秦勇,高弟,等.煤层群条件下的煤层气成藏特征[J].煤田地质与勘探,2011,39(5):22–26.YANG Zhaobiao,QIN Yong,GAO Di,et al.Coalbed methane(CBM)reservoir-forming character under conditions of coal seam groups[J].Coal Geology&Exploration,2011,39(5):22–26.
[11]沈玉林,秦勇,郭英海,等.“多层叠置独立含煤层气系统”形成的沉积控制因素[J].地球科学–中国地质大学学报,2012,37(3):573–579.SHEN Yulin,QIN Yong,GUO Yinghai,et al.Sedimentary controlling factor of unattached multiple superimposed coalbed methane system formation[J].Earth Science-Journal of China University of Geosciences,2012,37(3):573–579.
[12]杨兆彪,秦勇,陈世悦,等.多煤层储层能量垂向分布特征及控制机理[J].地质学报,2013,87(1):139–144.YANG Zhaobiao,QIN Yong,CHEN Shiyue,et al.Controlling mechanism and vertical distribution characteristics of reservoir energy of multi-coalbeds[J].Acta Geologica Sinica,2013,87(1):139–144.
[13]郭晨,秦勇,卢玲玲.黔西红梅井田煤层气有序开发的水文地质条件[J].地球科学进展,2015,30(4):456–464.GUO Chen,QIN Yong,LU Lingling.Hydrogeological conditions of orderly coalbed methane development in Hongmei well field,western Guizhou,south China[J].Advances in Earth Science,2015,30(4):456–464.
[14]郭晨,秦勇,易同生,等.黔西肥田区块地下水动力条件与煤层气有序开发[J].煤炭学报,2014,39(1):115–123.GUO Chen,QIN Yong,YI Tongsheng,et al.Groundwater dynamic conditions and orderly coalbed methane development of Feitian block in western Guizhou,south China[J].Journal of China Coal Society,2014,39(1):115–123.
[15]傅雪海,葛燕燕,梁文庆,等.多层叠置含煤层气系统递进排采的压力控制及流体效应[J].天然气工业,2013,33(11):35–39.FU Xuehai,GE Yanyan,LIANG Wenqing,et al.Pressure control and fluid effect of progressive drainage of multiple superposed CBM system[J].Natural Gas Industry,2013,33(11):35–39.
[16]全国矿产储量委员会.矿区水文地质工程地质勘探规范:GB12719—1991[S].北京:中国标准出版社,1991.
[17]李正根.水文地质学[M].北京:地质出版社,1980.
[18]河南理工大学,重庆地质矿产研究院.重庆市1∶50万煤矿瓦斯地质图说明书[R].重庆:重庆地质矿产研究院,2012.
[19]国土资源部油气资源战略研究中心.全国煤层气资源评价[M].北京:中国大地出版社,2009.