深部开窗侧钻井元坝1侧1井固井技术

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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