沁水盆地夏店区块煤层气藏气水分异特征
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摘要
沁水盆地夏店区块煤层气藏属低孔低渗致密气藏,区块试采情况证实该区气水分布关系复杂。为了明确研究区气水分布规律,对夏店区块试采区煤层气地质条件、压裂和生产动态资料进行分析,阐明夏店区块试采区的气水分布特点,探讨气水分布差异主控因素。结果表明,研究区气水分异主要表现为2种情况,一是高部位产气、低部位产水的重力分异;二是局部井区受断层影响,出现高部位产水、低部位产气的气水倒置现象。根据气水分布特征,以构造形态为骨架,结合储层、压裂及生产动态资料,建立了封闭断层–褶曲、类气顶、开放断层控制、微构造控制、顶底板岩性控制等5种气水分布模式,明确了沁水盆地夏店区块气水分布主要受构造及压裂控制影响,同时提出差异化的井位部署建议,可以指导该区煤层气进一步的勘探开发。
The coalbed methane reservoirs at Xiadian block of Qinshui basin are of low porosity and low permeability. In order to define the gas-water distribution rule in the study area, CBM geological conditions, fracturing and production performance data in the pilot mining district of Xiadian block were analyzed to illuminate the gas-water distribution characteristics and discusses the control factors of gas water distribution differences. The results show that the difference of gas and water in the study area occurs mainly in two cases, one is the difference of the gravity, gas occurs in higher part, water occurs in lower part; the second is that locally affected by the fault, and the gas-water inversion phenomenon occurs, water appears in the higher part and gas appears in the low part. According to the characteristics of gas-water distribution, with structural form as skeleton, combined with reservoir fracturing and production performance data, five patterns of gas and water distribution, were set up, that is, closed fault fold, gas-like cap, open fault control, micro structure control, lithologic control of roof and floor, it was defined that gas and water distribution in this area was mainly affected by structure and fracturing, at the same time differentiated well placement was suggested, which can guide the further exploration and development of CBM.
The coalbed methane reservoirs at Xiadian block of Qinshui basin are of low porosity and low permeability. In order to define the gas-water distribution rule in the study area, CBM geological conditions, fracturing and production performance data in the pilot mining district of Xiadian block were analyzed to illuminate the gas-water distribution characteristics and discusses the control factors of gas water distribution differences. The results show that the difference of gas and water in the study area occurs mainly in two cases, one is the difference of the gravity, gas occurs in higher part, water occurs in lower part; the second is that locally affected by the fault, and the gas-water inversion phenomenon occurs, water appears in the higher part and gas appears in the low part. According to the characteristics of gas-water distribution, with structural form as skeleton, combined with reservoir fracturing and production performance data, five patterns of gas and water distribution, were set up, that is, closed fault fold, gas-like cap, open fault control, micro structure control, lithologic control of roof and floor, it was defined that gas and water distribution in this area was mainly affected by structure and fracturing, at the same time differentiated well placement was suggested, which can guide the further exploration and development of CBM.
引文
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[13]刘昌平,胡秋嘉,樊彬,等.地层水对煤层气井产气效果的影响分析--以夏店区块李村井区为例[J].中国煤层气,2017,14(5):35-37.LIU Changping,HU Qiujia,FAN Bin,et al.Influence analysis of formation water on the gas production effect of CBM well[J].China Coalbed Mathane,2017,14(5):35-37.
[14]白海波,缪协兴,冯梅梅.潞安矿区新构造及其控水作用的研究[J].采矿与安全工程学报,2006,23(4):383-388.BAI Haibo,MIAO Xiexing,FENG Meimei.Research on the neotectonics and water controlling effect in Lu’an coal mine[J].Journal of Mining&Safety Engineering,2006,23(4):383-388.
[15]孙庆宇,张小东,赵家攀.长治区块煤层气赋存特征及控气因素[J].中国煤炭地质,2016,28(7):11-15.SUN Qingyu,ZHANG Xiaodong,ZHAO Jiapan.CBM hosting features and gas-controlling factors in Changzhi block[J].Coal Geology of China,2016,28(7):11-15.
[16]刘芳珍.潞安矿区奥陶系岩溶发育规律及成因探讨[J].地下水,1998,20(2):70-73.LIU Fangzhen.Preliminary exploration on karst developing cuase[J].Groundwater,1998,20(2):70-73.
[17]宋来明,贾达吉,徐强,等.断层封闭性研究进展[J].煤田地质与勘探,2006,34(5):13-16.SONG Laiming,JIA Daji,XU Qiang,et al.Advance in fault sealing study[J].Coal Geology&Exploration,2006,34(5):13-16.
[18]门相勇,闫霞,王峰,等.煤层气井高产水对排采产气的影响及预防措施[J].中国矿业,2017,26(增刊1):393-398.MEN Xiangyong,YAN Xia,WANG Feng,et al.The influence of high yieid water on gas production in CBM wells and its preventive measures[J].China Mining Magazine,2017,26(S1):393-398.
[19]胡秋嘉,李梦溪,乔茂坡,等.沁水盆地南部高阶煤煤层气井压裂效果关键地质因素分析[J].煤炭学报,2017,42(6):1506-1516.HU Qiujia,LI Mengxi,QIAO Maopo,et al.Analysis of key geologic factors of fracturing effect of CBM wells for high-rank coal in Southern Qinshui basin[J].Journal of China Coal Society,2017,42(6):1506-1516.
[20]陈海汇,范洪富,郭建平,等.煤层气井水力压裂液分析与展望[J].煤田地质与勘探,2017,45(5):33-40.GHEN Haihui,FAN Hongfu,GUO Jianping,et al.Analysis and prospect on hydraulic fracturing fluid used in coalbed methane well[J].Coal Geology&Exploration,2017,45(5):33-40.
[21]李安启,姜海,陈彩虹.我国煤层气井水力压裂的实践及煤层裂缝模型选择分析[J].天然气工业,2004,24(5):91-93.LI Anqi,JIANG Hai,CHEN Caihong.Hydraulic fracturing practice and coalbed fracture model selecting for coalbed gas wells in China[J].Natural Gas Industry,2004,24(5):91-93.
[2]杨永田.河东煤田三交区块水文地质条件与控气特征[J].中国煤田地质,2007,19(3):30-33.YANG Yongtian.Hydrogeological condition and gas controlling features of sanjiao Sector,Hedong coalfield[J].Coal Geology of China,2007,19(3):30-33.
[3]田冲,汤达祯,周志军,等.彬长矿区水文地质特征及其对煤层气的控制作用[J].煤田地质与勘探,2012,40(3):43-46.TIAN Chong,TANG Dazheng,ZHOU Zhijun,et al.Hydrogeological characteristics and their control on coalbed methane in abainchang amining area[J].Coal Geology&Exploration,2012,40(3):43-46.
[4]马凤山,李尚儒,蔡祖煌.煤层气开发的水文地质问题[J].水文地质工程地质,1998,25(3):20-22.MA Fengshan,LI Shangru,CAI Zuhuang.Hydrogeological problems in coalbed gas exploitation[J].Hydrogeology&Engineering Geology,1998,25(3):20-22.
[5]池卫国.沁水盆地煤层气的水文地质控制作用[J].石油勘探与开发,1998,25(3):15-18.CHI Weiguo.Hydrogeological control on the coalbed methane in Qinshui Basin[J].Petroleum Exploration and Development,1998,25(3):15-18.
[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]PASHIN J C,GROSHONG J R H.Structural control of coalbed methane production in Alabama[J].International Journal of Coal Geology,1998,38(1/2):89-113.
[8]孙粉锦,王勃,李梦溪,等.沁水盆地南部煤层气富集高产主控地质因素[J].石油学报,2014,35(6):1070-1079.SUN Fenjin,WANG Bo,LI Mengxi,et al.Major geological factors controlling the enrichment and high yield of coalbed methane in the southern Qinshui Basin[J].Acta Petrolei Sinica,2014,35(6):1070-1079.
[9]桑树勋,范炳恒,秦勇,等.煤层气的封存与富集条件[J].石油与天然气,1999,20(2):104-107.SANG Shuxun,FAN Bingheng,QIN Yong,et al.Conditions of sealing and accumulation in Coal-Bed gas[J].Oil&Gas Geology,1999,20(2):104-107.
[10]叶建平.潞安目标区煤层气赋存和生产的地质因素分析[J].煤田地质与勘探,2005,33(3):29-32.YE Jianping.Analysis on geological factors of coalbed methane distribution and production in Lu’an Area[J].Coal Geology&Exploration,2005,33(3):29-32.
[11]李清,赵兴龙,谢先平,等.延川南区块煤层气井高产水成因分析及排采对策[J].石油钻探技术,2013,41(6):95-99.LI Qing,ZHAO Xinglong,XIE Xianping,et al.Causes of high yield from CBM wells in Yanchuannan Block and draining measures[J].Petroleum Drilling Techniques,2013,41(6):95-99.
[12]任光军,王莉,娄剑青.柳林地区水文地质特征及其对煤层气生产井的影响[C]//叶建平.2008年煤层气学术研讨会论文集.北京:地质出版社,2008:378-389.
[13]刘昌平,胡秋嘉,樊彬,等.地层水对煤层气井产气效果的影响分析--以夏店区块李村井区为例[J].中国煤层气,2017,14(5):35-37.LIU Changping,HU Qiujia,FAN Bin,et al.Influence analysis of formation water on the gas production effect of CBM well[J].China Coalbed Mathane,2017,14(5):35-37.
[14]白海波,缪协兴,冯梅梅.潞安矿区新构造及其控水作用的研究[J].采矿与安全工程学报,2006,23(4):383-388.BAI Haibo,MIAO Xiexing,FENG Meimei.Research on the neotectonics and water controlling effect in Lu’an coal mine[J].Journal of Mining&Safety Engineering,2006,23(4):383-388.
[15]孙庆宇,张小东,赵家攀.长治区块煤层气赋存特征及控气因素[J].中国煤炭地质,2016,28(7):11-15.SUN Qingyu,ZHANG Xiaodong,ZHAO Jiapan.CBM hosting features and gas-controlling factors in Changzhi block[J].Coal Geology of China,2016,28(7):11-15.
[16]刘芳珍.潞安矿区奥陶系岩溶发育规律及成因探讨[J].地下水,1998,20(2):70-73.LIU Fangzhen.Preliminary exploration on karst developing cuase[J].Groundwater,1998,20(2):70-73.
[17]宋来明,贾达吉,徐强,等.断层封闭性研究进展[J].煤田地质与勘探,2006,34(5):13-16.SONG Laiming,JIA Daji,XU Qiang,et al.Advance in fault sealing study[J].Coal Geology&Exploration,2006,34(5):13-16.
[18]门相勇,闫霞,王峰,等.煤层气井高产水对排采产气的影响及预防措施[J].中国矿业,2017,26(增刊1):393-398.MEN Xiangyong,YAN Xia,WANG Feng,et al.The influence of high yieid water on gas production in CBM wells and its preventive measures[J].China Mining Magazine,2017,26(S1):393-398.
[19]胡秋嘉,李梦溪,乔茂坡,等.沁水盆地南部高阶煤煤层气井压裂效果关键地质因素分析[J].煤炭学报,2017,42(6):1506-1516.HU Qiujia,LI Mengxi,QIAO Maopo,et al.Analysis of key geologic factors of fracturing effect of CBM wells for high-rank coal in Southern Qinshui basin[J].Journal of China Coal Society,2017,42(6):1506-1516.
[20]陈海汇,范洪富,郭建平,等.煤层气井水力压裂液分析与展望[J].煤田地质与勘探,2017,45(5):33-40.GHEN Haihui,FAN Hongfu,GUO Jianping,et al.Analysis and prospect on hydraulic fracturing fluid used in coalbed methane well[J].Coal Geology&Exploration,2017,45(5):33-40.
[21]李安启,姜海,陈彩虹.我国煤层气井水力压裂的实践及煤层裂缝模型选择分析[J].天然气工业,2004,24(5):91-93.LI Anqi,JIANG Hai,CHEN Caihong.Hydraulic fracturing practice and coalbed fracture model selecting for coalbed gas wells in China[J].Natural Gas Industry,2004,24(5):91-93.