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时间:2019-05-22
《深部开窗侧钻井元坝1侧1井固井技术》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、第31卷第1期石油钻采工艺V01.3lNo.12009年2月OILDRILLING&PRODUCTIONTECHN0LOGYFeb.2009文章编号:1000—7393(2009)01—0038—04深部开窗侧钻井元坝1一侧1井固井技术陈道元赵洪涛(中原油田固井工程处,河南濮阳457331)摘要:元坝1一侧1井是在元坝1井的基础上进行开窗侧钻的一1:2重点探井,目的是为了进一步揭示元坝地区礁滩相储层气藏情况。完钻斜深7427.23m,0146.1mtn无接箍尾管下深7425.8lm,是目前川东北地区完钻和套管下深最深的一口井。具有井深、温度高、压力高
2、、钻井液密度高、环空间隙小、井斜、位移大、裸眼段长、小间隙、无接箍套管不能加装扶正器、套管在井眼中居中困难、地层破裂压力梯度不详、面临井漏等技术难题。通过采取优选抗高温水泥浆体系、加重隔离液体系。合理设计入井管柱结构,采用平衡压力固井技术,改进配浆方式等一系列技术措施固井。保证了套管顺利下入,解决了井漏、顶替效率低、施工泵压高、气体窜槽等问题。固井施工顺利,测井解释固井质量优,为超深井、小间隙井固井提供了可借鉴的依据。关键词:超深井;侧钻井;尾管固井;固井质量;元坝1一侧1井中图分类号:TE256-3文献标识码:BCementingtechnolog
3、yforYuanbaNo.1-sideldeepsidetrackingwellCHENGDaoyuan,ZHAOHongtao(CementingCompanyofZhongyuanPetroleumExplorationBureau,Puyang457331,China)Abstract:YuanbaNo.1一side1wellisanimportantaside—trackingexplorationwellbasedonYuanbaNo.1,whichisdisposedtorevealthesituationofreefbeachphase
4、payzonegasreservoirsinYuanbaarea.Itiscurrentlythedeepestwellwiththefinalinclineddepth7427.23mandtheruninhole(Rm)depthoftheflushliner0146.1min7425.81minsoutheasternSichuan.Itfeaturesinhightemperatureandpressure,highdrillingfluiddensity,smallannularclearance,inclinedwellbore,grea
5、tofset,longopenhole,andsmallclearance.Inaddition,alotoftechnicalproblemsneedtobesolved.Forinstance,centralizerscannotbeaddedtotheflushcasing,tokeepcasingcentralizedinsidethewellboregetsdificult,andcirculationlossislikelytooccur.Systematiccementingmethodsaread—opted,suchastheopt
6、imizationofhightemperatureresistancecementingslurrysystemandweightedspacerfluidsystem,therationaldesignofRIHstringcombination,theuseofbalancedpressurecementingtechniques,andtheimprovementofslurrymakingmethod.Allthemethodsensurethecasingisruninholesuccessfully,solvingtheproblems
7、likecirculationloss,poordisplacement,highpumppressure,andgaschanneling.Cementingoperationrunssuccessfully,andlogginginterpretationshowsthecementingqualityisexcel—lent.ThesuccessfulwellcementingcreatestherecordofultradeepwellcementinginsoutheasternSichuan,providingusefulreferenc
8、eforcementingofultradeepwellsandwellsofsmallclearancei
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