阜康向斜煤层气开发高产关键地质要素
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摘要
在前人划分的阜康向斜煤层气开发地质单元的基础上,结合煤层气井测井和生产数据,研究了阜康向斜煤层气井高产地质特征。结果表明,在阜康向斜已经划分的14个煤层气开发地质单元中,滞留区煤矿床层间裂隙水主要来源于上覆松散岩类孔隙潜水和同层含水层的侧向补给,在水力封闭或封堵作用下,煤层气易成藏,产量高于径流区;由于埋深对储集层垂向应力的影响,使得中部埋深滞留区渗透性好,产量高于深部滞留区;利用双侧向电阻率测井曲线判断煤层裂隙发育程度,深部轻微变形储集层渗透性较好,产量高于严重变形储集层;煤系非常规天然气的联合开发有助于煤层气井高产。
Based on the geological units divided by pervious researchers for coalbed methane development and combined with logging andproduction data obtained from coalbed methane wells, the paper studies the geological characteristics of high-yield coalbed methane wellsin Fukang syncline. The results show that in the fourteen geological units divided in Fukang syncline, the fissure water between coal bedsin the stagnant area mainly come from pore phreatic water in loose rock mass and the lateral supply of the aquifer in the same zone, coalbedmethane may easily accumulate under the action of hydraulic sealing and plugging and the production in the stagnant area is higher thanthat in the runoff area; due to the influence of burial depth on reservoir vertical stress, the stagnant area with medium burial depth has rela-tively good permeability, whose production is higher than that of the deep-burial stagnant area; the dual lateral resistivity logs are used tojudge the development degree of cracks in the coal beds, the reservoir with slight deformation in deep strata has good permeability, whoseproduction is higher than that with serious deformation. It is considered that the combined development of coal-series conventional naturalgas is helpful for the high yield of coalbed methane wells.
Based on the geological units divided by pervious researchers for coalbed methane development and combined with logging andproduction data obtained from coalbed methane wells, the paper studies the geological characteristics of high-yield coalbed methane wellsin Fukang syncline. The results show that in the fourteen geological units divided in Fukang syncline, the fissure water between coal bedsin the stagnant area mainly come from pore phreatic water in loose rock mass and the lateral supply of the aquifer in the same zone, coalbedmethane may easily accumulate under the action of hydraulic sealing and plugging and the production in the stagnant area is higher thanthat in the runoff area; due to the influence of burial depth on reservoir vertical stress, the stagnant area with medium burial depth has rela-tively good permeability, whose production is higher than that of the deep-burial stagnant area; the dual lateral resistivity logs are used tojudge the development degree of cracks in the coal beds, the reservoir with slight deformation in deep strata has good permeability, whoseproduction is higher than that with serious deformation. It is considered that the combined development of coal-series conventional naturalgas is helpful for the high yield of coalbed methane wells.
引文
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[14]王斌,孙卫,白云云,等.鄂尔多斯盆地姬塬地区长61段致密砂岩储集层成岩作用与孔隙演化[J].新疆石油地质,2018,39(4):430-438.WANG Bin,SUN Wei,BAI Yunyun,et al.Diagenesis and pore evolution of tight sandstone reservoir of Chang 61member in Jiyuan area,Ordos basin[J].Xinjiang Petroleum Geology,2018,39(4):430-438.
[15]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):1 070-1 079.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):1 070-1 079.
[16]KANG J Q,FU X H,GAO L,et al.Production profile characteristics of large dip angle coal reservoir and its impact on coalbed methane production:a case study on the Fukang west block,southern Junggar basin,China[J].Journal of Petrolrum Science and Engineering,2018,171:99-114.
[17]NELSON C R.Deep coalbed gas plays in the U.S.Rocky mountain region[R].Annual Meeting Expanded Abstracts-American Association of Petroleum Geologists,2003:127.
[18]OISON T,HOBBS B,BROOKS R.Paying off for Tom Brown in white river dome field’s tight sandstone,deep coals[R].The American Oil and Gas Reports,2002:67-75.
[19]傅雪海,德勒恰提·加娜塔依,朱炎铭,等.煤系非常规天然气资源特征及分隔合采技术[J].地学前缘,2016,23(3):36-40.FU Xuehai,Deleqiati·JIANATAYI,ZHU Yanming,et al.Resources characteristics and separated reservoirs drainage of unconventional gas in coal measures[J].Earth Science Frontiers,2016,23(3):36-40.
[2]魏迎春,张强,王安民,等.准噶尔盆地南缘煤系水矿化度对低煤阶煤层气的影响[J].煤田地质与勘探,2016,44(1):31-37.WEI Yingchun,ZHANG Qiang,WANG Anmin,et al.The influence of the salinity of groundwater in coal measures on low rank coalbed methane in the south margin of Junggar basin[J].Coal Geology&Exploration,2016,44(1):31-37.
[3]陈刚.准噶尔盆地彩南地区深层低阶煤吸附特征及其影响因素[J].煤田地质与勘探,2016,44(2):50-54.CHEN Gang.The adsorption characteristics and affecting factors of deep low-rank coal in Cainan area of Junggar basin[J].Coal Geology&Exploration,2016,44(2):50-54.
[4]王生维,王峰明,侯光久,等.新疆阜康白杨河矿区急倾斜煤层的煤层气开发井型[J].煤炭学报,2014,39(9):1 914-1 918.WANG Shengwei,WANG Fengming,HOU Guangjiu,et al.CBM development well type for steep seam in Fukang Baiyanghe mining area,Xinjiang[J].Journal of China Coal Society,2014,39(9):1 914-1 918.
[5]傅雪海,康俊强,梁顺,等.阜康西区急倾斜煤储层排采过程中物性及井型优化[J].煤炭科学技术,2018,46(6):9-16.FU Xuehai,KANG Junqiang,LIANG Shun,et al.Well type optimization and physical property in gas drainage process of steep inclined coal reservoir in Fukang western block[J].Coal Science and Technology,2018,46(6):9-16.
[6]周三栋,刘大锰,孙邵华,等.准噶尔盆地南缘硫磺沟煤层气富集主控地质因素及有利区优选[J].现代地质,2015,29(1):179-189.ZHOU Sandong,LIU Dameng,SUN Shaohua,et al.Factors affecting coalbed methane enrichment and CBM favorable area of Liuhuanggou area in the southern Jungger basin[J].Geoscience,2015,29(1):179-189.
[7]张开军,张强,魏迎春,等.准噶尔盆地南缘硫磺沟地区水文地质特征及其对煤层气富集的影响[J].煤田地质与勘探,2018,46(1):61-65.ZHANG Kaijun,ZHANG Qiang,WEI Yingchun,et al.Hydrogeological conditions and their effect on the coalbed methane enrichment in Liuhuanggou area on the south margin of Junggar basin[J].Coal Geology&Exploration,2018,46(1):61-65.
[8]LI X,FU X H,YANG X S,et al.Coalbed methane accumulation and dissipation patterns:case study of the Junggar basin,NW China[J].Journal of Asian Earth Sciences,2018,160:13-26.
[9]李升,葛燕燕,杨雪松,等.准噶尔盆地阜康西区块西山窑组构造-水文地质控气特征[J].新疆石油地质,2016,37(6):631-636.LI Sheng,GE Yanyan,YANG Xuesong,et al.Gas-controlling characteristics of structural and hydrogeological factors in Xishanyao formation of western Fukang block,Junggar basin[J].Xinjiang Petroleum Geology,2016,37(6):631-636.
[10]LI X,FU X H,GE Y Y,et al.Coalbed methane accumulation and development unit of Fukang syncline in Junggar basin,Xinjiang,China[J].Electronic Journal of Geotechnical Engineering,2017,22(4):1 467-1 482.
[11]科林思德能源有限责任公司.阜康西区地面排采煤层气可行性研究报告[R].2012.Cleanseed Energy Limited Liability Company.The feasibility study report of coalbed methane production from surface ground in western Fukang mining area[R].2012.
[12]伊伟.鄂尔多斯盆地韩城矿区中煤阶煤层气成藏模式[J].新疆石油地质,2017,38(2):165-170.YI Wei.Accumulation pattern of medium rank coalbed methane in Hancheng mining area,Ordos basin[J].Xinjiang Petroleum Geology,2017,38(2):165-170.
[13]傅雪海,秦勇,韦重韬.煤层气地质学[M].江苏徐州:中国矿业大学出版社,2007:136-137.FU Xuehai,QIN Yong,WEI Chongtao.Coalbed methane geology[M].Xuzhou,Jiangsu:China University of Mining and Technology Press,2007:136-137.
[14]王斌,孙卫,白云云,等.鄂尔多斯盆地姬塬地区长61段致密砂岩储集层成岩作用与孔隙演化[J].新疆石油地质,2018,39(4):430-438.WANG Bin,SUN Wei,BAI Yunyun,et al.Diagenesis and pore evolution of tight sandstone reservoir of Chang 61member in Jiyuan area,Ordos basin[J].Xinjiang Petroleum Geology,2018,39(4):430-438.
[15]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):1 070-1 079.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):1 070-1 079.
[16]KANG J Q,FU X H,GAO L,et al.Production profile characteristics of large dip angle coal reservoir and its impact on coalbed methane production:a case study on the Fukang west block,southern Junggar basin,China[J].Journal of Petrolrum Science and Engineering,2018,171:99-114.
[17]NELSON C R.Deep coalbed gas plays in the U.S.Rocky mountain region[R].Annual Meeting Expanded Abstracts-American Association of Petroleum Geologists,2003:127.
[18]OISON T,HOBBS B,BROOKS R.Paying off for Tom Brown in white river dome field’s tight sandstone,deep coals[R].The American Oil and Gas Reports,2002:67-75.
[19]傅雪海,德勒恰提·加娜塔依,朱炎铭,等.煤系非常规天然气资源特征及分隔合采技术[J].地学前缘,2016,23(3):36-40.FU Xuehai,Deleqiati·JIANATAYI,ZHU Yanming,et al.Resources characteristics and separated reservoirs drainage of unconventional gas in coal measures[J].Earth Science Frontiers,2016,23(3):36-40.