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1、第37卷第5期石油钻采工艺Vol.37No.52015年9月OILDRILLING&PRODUCTIONTECHNOLOGYSept.2015文章编号:1000–7393(2015)05–0022–04doi:10.13639/j.odpt.2015.05.006断块油气藏大落差阶梯水平井轨道优化111121孔 华 兰 凯 刘明国 晁文学 朱 军 张 敏(1.中原石油工程有限公司钻井工程技术研究院,河南濮阳 457001;2.中原油田石油工程技术研究院,河南濮阳 457001)引用格式:孔华,兰凯,刘明国,等.断块油气藏大落差阶梯水平井轨道优化[J].石油钻采工艺,
2、2015,37(5):22-25.摘要:为了降低东濮凹陷断块油气藏大落差阶梯水平井管柱下入摩阻,开展了大跨距阶梯水平井轨道优化研究。考虑地层实际造斜能力,优化了造斜段的靶前位移和造斜率;建立了带封隔器(或扶正器)的完井管柱下入摩阻模型,优化了阶梯过渡段的井眼曲率和位移差。分析表明,造斜段靶前位移控制在300~400m,造斜率先低后高,适当降低阶梯过渡段造斜率和位移差,有利于降低钻进和管柱下入摩阻。设计成果在东濮凹陷4口阶梯水平井中应用,阶梯着陆中靶率100%,储层钻遇率最大95.3%,水平段最长达到1214m,断块落差控制范围7.14~40.3m。应用结果表明,采用
3、分段评估的方法优化阶梯水平井轨道参数具有针对性和全面性,为同类型阶梯水平井的设计提供了借鉴。关键词:东濮凹陷;阶梯水平井;大落差;断块油气藏;轨道优化;管柱下入能力中图分类号:TE243 文献标识码:BWell-pathoptimizationtechnologyforsteppedhorizontalwellswithlargedropinthefaultblockreservoirs111121KONGHua,LANKai,LIUMingguo,CHAOWenxue,ZHUJun,ZHANGMin(1.DrillingEngineeringandTechno
4、logyResearchInstitute,SINOPECZhongyuanPetroleumEngineeringCo.Ltd.,Puyang457001,China;2.ResearchInstituteofPetroleumEngineeringTechnology,SINOPECZhongyuanOilfieldCompany,Puyang457001,China)Abstract:Inordertoreducethefrictionwhenrunningstringinsteppedhorizontalwellsinthefaultblockreservoi
5、rwithlargedropintheDongpudepression,studiesonoptimizationofwell-pathofsteppedhorizontalwellwithlargespanwerecarriedout.Giventheactualanglebuildingrateoftheformations,thepre-targetdisplacementandbuild-uprateofthebuildingupsectionwereoptimized.Amodelforanalyzingtherunningfrictionofcomple
6、tionstringwithpacker(orcentralizer)andstresswasbuilt,andthewellborecurvatureanddisplacementdifferenceofthesteppedtransitionintervalwasoptimized.Analysisshowsthat,whenthepre-targetdisplacementatbuildingupsectioniscontrolledat300~400m,thebuildingrateislowfirst,thenbecomeshigh.Properlyred
7、ucingthebuildingrateanddisplacementdifferenceofthesteppedtransitionintervalhelpreducedrillingfrictionandstringrunningfriction.ThedesignresultwasusedinfoursteppedhorizontalwellsinDongpuDepression,thetargetingrateofsteppedlandingwas100%,themaximumreservoirencounteringratiowas95.3%,them