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《基于斜面圆弧法的三维绕障轨道设计方法.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第32卷第1期石油钻采工艺V01.32No.12010年1月0ILDRILLING&PR0DUCTIONTECHNOLOGYJan.2010文章编号:1000—7393(2010)01—0017—05基于斜面圆弧法的三维绕障轨道设计方法刘凯朝樊洪海纪荣艺(中国石油大学石油天然气工程学院,北京102249)摘要:在复杂的钻井工况下,需要绕过一定障碍钻达目标点,要求设计的井眼轨道既有井斜角的变化,又有方位角的变化。运用传统的圆柱螺线法设计三维绕障井时,先设计水平面上的投影,再设计垂直剖面图,设计步骤繁琐,空间曲线复杂。将用于纠斜设计的斜面圆弧法运用于三
2、维绕障井设计,且使井眼轨道上任一点在水平面上的投影距绕障中心的距离大于绕障半径,从而使斜面圆弧法设计绕障井成为可能。由于设计的井眼轨道仅为斜平面上的圆弧和直线,轨道形状简单,设计方便。施工中运用单一的造斜率进行钻进,不用频繁地调整造斜率或更换造斜工具,施工方便。关键词:绕障井;斜面圆弧法;轨道设计;三维井眼轨道中图分类号:TE242文献标识码:AThree—dimensionaldetouringwelldesignmethodstudybasedoninclinedplanecirculararcmethodLIUKaizha0,FANHongh
3、ai,JIRongyi(ChinaUniversityofPetroleum,PetroleumandNaturalGasEngineeringDepartment,Beijing102249,China)Abstract:Undercomplicateddrillingcircumstances,detouringwellisdesignedtodetoureobstaclesbetweenwellheadandtarget,bothdeviationangleandazimuthanglearerequiredtochangetofulfill
4、thiskindofwelldesigndetouringwellisdesingedtodetoureobstaclesbetweenwellheadandtarget,bothdeviationangleandazimuthangleareregairedtochangetofulfillthiskindofwelldesign.Ondesigning3-Ddetouringwellbyusingtraditionalcylinderhelixmethod,projectiononthehorizonisdesignedfirst,thenth
5、everticalprofile,theproceduresofthismethodarecomplexandspacecurvesarecomplicated.Three—dimensionalDetouringwelldesignbasedontheinclinedplanecirculararcmethodisdiscussedinthispassage:byaddingaconstraint,thatis,bymakingthedistancebetweenthedetouringcenterandthehorizontalprojecti
6、onpointlargerthanthedetouringradius,detouringwelldesignbasedoninclinedplanecirculararcmethodbecomespossible.Asthedesignedwelltracksarejustarcsandstraightlines,spacecurvesofwelltrackaresimpli-fledanddesignbecomesconvenient.Byusingsinglebuild—uprateintheoperation,build—uprateoft
7、oolsnolongerneedstobeadjustedordeflectingtoolsnolongerneedtobereplacedfrequently,whichgreatlyfacilitatetheoperation.Themethoddiscussedinthispassageenrichesthree—dimensionaldetouringwelltrackdesignmethods.Keywords:detouringwell;inclinedplanearcmethod;trackdesign;three—dimension
8、alwelltrack在地面井位选定的情况下,要钻达目标点,但都会遇到不能在铅垂面上设计,需要绕过障碍物钻在井位与目标点所
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