椭圆水泥环厚度和弹性模量对套管受力的影响分析

:1008-1402(2009)02-0256-031,2(1.,163714;2.,163714):根据岩石力学和弹塑性力学理论,建立套管-水泥环-地层力学模型,采用有限元方法研究分析不同地应力条件下椭圆水泥环厚度和弹性模量对套管应力的影响,研究结果表明:在均匀地应力条件下,一定厚度的圆形水泥环对减小套管受力有益,在非均匀地应力条件下,采用椭圆水泥环能有效的减小套管应力.:椭圆水泥环;厚度;弹性模量;套管:TE826:A0,[1-3],,,,,.,,().,,[4],.1--,[5],,1.,,(),1.0,1.1,1.2,1.3,1.41.5.,5~6,,,10.2.1--,:h=1850m,Dc=139.7mm,=6.2mm,Ec=210GPa,c=0.26,Pi=23.4MPa,=0.18,Es=20GPa,s=0.28.2,hH,h=H=28.1MPa,:2009-01-19:(1981-),,,,,.第27卷第2期佳木斯大学学报(自然科学版)Vol.27No.22009年03月JournalofJiamusiUniversity(NaturalScienceEdition)Mar.2009E10~60GPa,10mm,3.E30GPa,6mm~12mm,4.3,,,,1.1;,,,20GPa,.4,,,,1.1;,,,.3,,,.H=29.1MPa,h=24.5MPa,,56.5,,,,;,,,20GPa.66,,257第2期贾春雨,等:椭圆水泥环厚度和弹性模量对套管受力的影响分析,;,,,.41),,,,,.,,,,.,.2),,,.,,,,,.,.:[1],,,.[J].,2004;24(8):50-52.[2].[J].(),1997,21(6):24-28.[3],,.[J].(),2005,29(6):41-44.[4]W.J.Rodriguez,W.W.Fleckenstein,A.W.Eustes.SimulationofCollapseLoadsonCementedCasingUsingFiniteElementAnalysis[J].SPE84566,2003.[5],.[M].:,2003.TheEffectofEllipticCementSheathThicknessandElasticModulesonCasingStressJIAChun-yu1,DAIXiao-yu2(1.TechnologyDept.,DaqingPetrochemicalCompany,Daqing163714,China;2.ConstructionBranch,DaqingPetrochemicalCompany,Daqing163714,China)Abstract:Acasing-cementsheath-formationmechanicalmodelwasbuiltaccordingtotherockmechanicsandelastic-plasticmechanicstheory.Thefiniteelementanalysiswasusedtoresearchtheinfluenceofthicknessandtheelasticmodulusoftheellipticalcementsheathoncasingstressunderdifferentin-situstressstates.Theresearchsuggeststhatcircularcementsheathwithacertainthicknessbecomesavailabletoreducecasingstressinauniformstressconditionsandcaneffectivelyreducecasingstressusingellipticalcementsheathinnon-uniformstressconditions.Keywords:ellipticcementsheath;thickness;elasticmodules;casing258佳木斯大学学报(自然科学版)2009年