煤层气分支水平井与定向井连通钻井技术

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1、第33卷第5期石油钻采工艺V01．33No．52011年9月OILDRILLING&PRODUCT10NTECHN0L0GYSep．2011文章编号：1000—7393(2011)05—0001—03煤层气分支水平井与定向井连通钻井技术王自民毕泗义闫丰明刘春林(中原石油勘探局钻井一公司，河南濮阳457331)摘要：国内外较为先进的煤层气井布置方式多为分支连通井，通常采用水平井与直井连通后再钻分支井的开采方式。随着煤层气勘探开发的不断深入，分布在山区、丘陵等交通不便的区块日渐表现出井位布置严重受限、道路井场

2、修建费用成倍增长、井位分散、零星排采管理困难的现象。为此通过研究将煤层气排采井由直井改为定向井，在很大程度上解决了井位布置受限问题，降低了道路井场修建成本，实现了丛式井的集中排采管理。以ZY-H4．LS井组为例，论述了将分支井和定向井一体化设计、一体化施工来成功实现分支水平井与定向井连通的关键技术及解决方法，为煤层气开发提供了新思路。关键词：煤层气；连通；多分支水平井；定向井；一体化设计；一体化施工；钻井技术中图分类号：TE243文献标识码：ADrillingtechniqueforcoal-bedmet

3、hanemulti—lateralhorizontalwellintersectionwithdirectionalwellWANGZimin，BISiyi，YANFengming，L1UChunlin(No1DrillingCompanyofZhongyuanPetroleumExplorationBureau，Puyang457331，China)Abstract：MultilateralintersectionwelliSthemoreadvancedlayoutforcoal—bedmethane

4、athomeandabroad．Drillingmultilateralwellafterthesuccessfulintersectionofhorizontalwellandvegicalwellisthecommonexploitationmethod．Withthedevelopmentofcoal—bedmethane，manydificultiesappearinthetraficinconvenienceareasuchashillyandmountainousareas．Thedificu

5、ltiesincludelimitedwell—sitearrangement，multipliedcostofwellsiteroadconstruction，anddificultmanagementindecentralizedproduction，etc．Coal-bedmethaneexploitationchangefromverticalwelltodirectionalwellisstudied，anditcanlargelysolvethelimitedwell—sitear—range

6、ment，decreasethecostofwellsiteroadconstruction，andachievethecentralizedmanagementforclusteredwells．Tosomeextent,itcreatesnewexploitationdomainofcoa1．bedmethane．However．wehavenoantecedentofhorizontalwellintersectionwithdirectionalwelltoguide．ZY-H4·LSwellgr

7、oupadoptslotsoftechnologieslikeintegrativedesignandintegrativeconstructionofmultilateralwellanddirectionalwell，andsucceedsinrealizingintersectionbetweenmultilateralhorizontalwellanddirectionalwel1．Itcreatednationalprecedentforthiskindofconstructionandoffe

8、rsal'lewideaforcoal—bedmethaneexploitation．Keywords：coal-bedmethane；intersection；multilateralhorizontalwell；directionalwell；integrativedesign；integrativeconstruc—tion；drillingtechnique随着煤层气勘探开发的不断发展，多分支水平垂直井连通，钻成多组水