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时间:2019-05-15
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1、第31卷第2期石油钻采工艺Vo1.31No.22009年4月OILDRILLING&PR0DUCT10NTECHNOLOGYApr.2009文章编号:1000—7393(2009)02—0027—05CB3.1双分支水平井钻井工艺石崇东王万庆谌建祁田长春张虎平沈建文(1.长庆钻井工程总公司定向井技术服务公司,陕西西安710021;2.西南油气公司川西采气厂,四川德阳618000;3.长庆油田第四采油厂,陕西靖边718500;4.滇黔桂石油勘探局第一钻探公司,山东临邑251500)摘要:CB3—1井是长庆钻井总公司在长北气田承担的第1口双分支水平井,每个分支设计水平段为2000m,钻探目的层
2、为山西组山2段。介绍了该井井身剖面优化设计、套管开窗及裸眼侧钻等新技术,针对表层大井眼井壁稳定性差、“双石层”易垮塌、裸眼侧钻、气层深度不一、轨迹调整频繁、摩阻扭矩预测及分支井所面临窗口再入等一系列技术难题,制定了一整套合理的技术措施。总结出煤层段钻进的技术要点及适合长北区块的双分支水平井钻井液体系,PBL循环接头、AgitatorSub等先进井下工具的应用确保水平段穿越在最有价值的产层中。CB3—1井的开发对提高该区块的产能具有重要作用。关键词:分支水平井;井眼轨迹控制;套管开窗;裸眼侧钻;工具应用中图分类号:TE243文献标识码:ACB3·-1dual··lateralhorizont
3、alwelldrillingtechnologySHICh0ngd0ng,WANGWaNing。CHENJianqi,TIANChangchunzZHANGHuping,SHENJianwen4,,(1.TheDirectionalWellTechnologyCompanyunderChangqingWellConstructionCompany,Xi’an710021,China;2.TheChuanxiGasProductionPlant,SinopecSouthwestOilfieldCompany,Deyang618000,China;3.The4thOilProductionPl
4、ant,ChangqingOitileJingbian718500,China;4ThelStDrillingCompany,DianqianguiPetroleumExplorationBureau,三inyi25l500,China)Abstract:WellCB3--1isthefirstdual·lateralhorizontalwelldrilledbytheChangqingWellConstructionCompanyinChangbeigasfield,eachbranchofthehorizontalintervalisdesignedas2,000meters.Thed
5、rillingtargetisthemember2inShanxiFormation.Thepaperintroducesthetechnologyofoptimizationdesignofwellboreprofile,thecasingwindow—openingtechnology,andthebarefootlaterallydrillingtechnology.Inviewofsuchproblemsasthepoorwellborestabilityoflargehole,theeasilycollapsed‘‘Shuangshibed”,thebarefootlateral
6、lydrilling,thediferentdepthofproductionformations,thefrequenttrajectoryadjustment,thepredictionoftorqueanddra吕andwindowentryofbranchwells,systematicreasonabletechnicalmeasuresareestablished.Technicalpointsofdrillingincoalseamsectionsandthedrillingfluidsystemofdual—lateralhorizontalwellsinChangbeib
7、lockaresummedup.TheapplicationofPBLcirculationjoint,AgitatorSubandotheradvanceddownholetoolsensurethatthehorizontalsectionpassthroughthemostvaluableproductionformations.ThedevelopmentofCB3—1wellisveryimportanttoi
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