深水井口导管贯入阻力研究

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1、中图分类号：TE248单位代码：10425学号：LS1202001深水井口导管贯入阻力研究StudyonPenetrationResistanceofConductorCasing学科专业：油气井工程研究方向：油气井岩石力学与工程作者姓名：BenjaminChukwuebukaUmobi指导教师：王腾教授二〇一五年十一月StudyonPenetrationResistanceofConductorCasingAThesisSubmittedfortheDegreeofMasterCandidate：BenjaminChukwuebukaUmobiSupervis

2、or：Prof.WangTengCollegeofPetroleumEngineeringChinaUniversityofPetroleum(EastChina)iiStudyonPenetrationResistanceofConductorCasingBenjaminChukwuebukaUmobi(Oil&GasWellEngineering)DirectedbyProf.WangTengAbstractDuringtheinstallationofoilandgasdrillingstructuresinsoiltherearepossibilitie

3、sofwashout,hydraulicfractureorotherdrillingproblemendangeringthesoilfoundation.Soilischaracterizedbystrainratedependencyandwhensoilsareshearedandremouldeditexhibitsasoftenbehaviour.Therehasbeenconvectionaldesignmethodestablishedontheprincipleofrate-independentperfectlyplasticsoil.Ont

4、heotherhandconductorcasingisastructuralfoundationdesignedtoprovideprotectiontodrillingandproductionequipment,andprovidesastablesupportforthewellheadandChristmastree.Therehavebeenmanyworksonstructuresdrivenintothesoilusingarangeofpilingtechnique,butlessstudyontheconductorcasingsoilint

5、eractionbehaviour.Inthisthesisaverticallyloadedconductorcasingpenetratingsoftandstiffclaysoilhasbeenstudiedusingfiniteelementnumericalmethods.Thisprojecthasreviewedfundamentalsandexistingtheoriesforpiles,pile-soilinteraction,testandanalyticalmethodswhosetheoriesisanalogoustoconductor

6、casing.Johnson-CookconstitutivemodelwasappliedinthisnumericalanalysistotakeintoaccountStainrate.TheJohnson-Cook(JC)constitutivemodelandArbitraryLagrangian-Eulerianmethod(ALE),usingABAQUS/StandardandExplicitwereemployedfortheanalysistosimulatedeformationsduringtheconductorcasingpenetr

7、ationprocess.Thisstudyhasconsideredonlytherighthalfofasimplifiedgeometryoftheconductorcasing,modelledasacylindricalpipeof60mlengthwithouterdiameterof0.76mandathicknessof0.025m.Thisanalysiswillshowstresseseffectontheconductorbehaviorinthesoilandallowfortheestimationoftheeffectsofcondu

8、ctorcasingpe