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时间:2020-03-25
《延川南煤层气藏水文地质特征与产能关系.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2014年4月大庆石油地质与开发Apr.,2014第33卷第2期PetroleumGeologyandOilfieldDevelopmentinDaqingV01.33No,2DOI:10.3969/J.ISSN.1000—3754.2014.02.036延川南煤层气藏水文地质特征与产能关系李清(中国石化华东分公司,江苏南京210011)摘要:通过对延川南煤层气田2号煤层开发试验井组的水离子组成、水力压头的展布特征等水文参数分析,研究了水文条件与煤层气产能的关系。水文地质特征分析表明:延川南2号煤层存在3种水动力条件,随着矿化度的整体增高,单井产能明显增大;煤层压力水头越高,产能越高;
2、万宝山构造带更利于富集成藏,其单井产能明显高于谭坪构造带,为下步煤层气开发的有利地区。研究成果进一步验证了煤层气的保存条件是决定产能的主要因素,并为该区优选开发区块、实现高效开发提供了地质依据。关键词:煤层气;水动力;矿化度;产能;开发试验;延川南;鄂尔多斯盆地中图分类号:TE375文献标识码:A文章编号:1000—3754(2014)02—0170—05RELATIoNSHIPBETWEENTHEHYDRoGEoLoGICALCHARACTERISTICSANDPRoDUCTIVITYFoRTHECBMRESERVOIRSINSoUTHYANCHUANLIQing(EastChina
3、BranchCompanyofSINOPEC,Nanfing210011,China)Abstract:Bytheanalysesofthehydrogeologicalparameterssuchastheioniccompositionofthewater,spreadcharacteristicsofthehydraulicheadandSOonforthedevelopmenttestingwellgroupofLayer2inSouthYanchuanCBMGasfield,therelationshipbetweenthehydrogeologicalconditionsa
4、ndgasproductivityarestudied.Theanaly—sesofthehydrogeologicalcharacteristicsshowthattherearethreekindsofhydrodynamicconditionsinthe1ayer,withthewholeriseofthesalinity,theproductivityofeachwellwillobviouslyincrease;thehigherthehydraulicheadofthecoalbed,thegreatertheproductivitywillbe;WanbaoshanStr
5、ucturalBeltismorefavorablyenrichedandaccumulatedandmoreovertheproductivityofeachwellinthebeltishigherthanthatofTanpingStructuralBelt,SOithasbecomethefavoriteregionforfurtherCBMdevelopment.TheresearchachievementsfurthertestifythatthepreservingconditionsoftheCBMarethemainfactordeterminingtheproduc
6、tivityandmoreovertheresultshaveprovidedthegeologicalevidencesfortheoptimizationofthedevelopingblockandrealizationofthehigh--effi-ciencydevelopmentfortheblock.Keywords:CBM;hydrodynamics;salinity;productivity;developmenttest;SouthYanchuan;ErdosBasin收稿日期:2013—08—29改回日期:2013—11.08基金项目:中国石化重大先导科研“延川南
7、煤层气田产气能力影响因素分析”(2012XD0102)。作者简介:李清,男,1964年生,硕士,高级工程师,从事油气勘探开发生产管理和科研工作。E—mail:liqingsinopec@163.com_·174·大庆石油地质与开发2014正(2)矿化度和煤层压力是影响产能的主要因分析【J].大庆石油地质与开发,2006,25(2):34—38.[15]王运海.煤层气井排采井井底流压控制技术[J].石油天然素。随矿化度的整体增高,单井产能明显增大
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