【7A文】钻井工程英文课件17.1 Rock Mechanics.ppt

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1、7/19/20211RockMechanics17.1SergueiJourine&JeromeSchubert19June20037/19/202117.1-2OutlineModelDescriptionNearWellboreStressStateFailureModesTransportProblemsPossibleCompletionApplications7/19/202117.1-3TransportModelGeomechanicsModelReservoirFluidFlowModelModelsProject408PressureFlowRa

2、teWellborePerformanceErosionFailureDEVELOPMENTOFABLOWOUTINTERVENTIONMETHODANDDYNAMICKILLSIMULATORFORBLOWOUTSOCCURRINGINULTRA-DEEPWATERPHASE1.AstudyofwellborecollapseandbridgingphenomenaSolidProductionStressStateGeometryEvolutionFailureMode7/19/202117.1-4Geomechanics:EVALUATESTRESSESPRE

3、DICTFAILURE7/19/202117.1-5NearWellboreStressStatePrincipalStressesPorePressureEffectiveStressesStressPathsPStressState7/19/202117.1-6NearWellboreStressStateStressStateFluidFlowProblemattimeT(i)toT(i+1)One-waycouplingPorePressureGeomechanicsProblemattimeT(i)toT(i+1)FluidFlowProblemattim

4、eT(i)toT(i+1)GeomechanicsProblemattimeT(i)toT(i+1)FluidFlowProblemattimeT(i)toT(i+1)GeomechanicsProblemattimeT(i)toT(i+1)LoosecouplingFullcouplingS.E.Minkoffet.al:CoupledfluidflowandgeomechanicaldeformationmodelingJournalofPetroleumScienceandEngineering38(2003)37–567/19/202117.1-7Probl

5、emDefinitionStressStateOuterRadius(NoFlow)InnerRadius(Pw=0att>0)InitialConditions:P=Piatt=0ConstantHorizontalTotalStressPlainStrain(NoVerticalDisplacements)FluidFlowProblemattimeT(i)toT(i+1)One-waycouplingPorePressureGeomechanicsProblemattimeT(i)toT(i+1)7/19/202117.1-8TransientFluidFlo

6、wInitialConditions:P=Piatt=0InnerRadius(Pw=0att>0)PressureDropatt=0PorePressureEvolutionatt>0StressStateP7/19/202117.1-9One-waycouplingPoro-ElasticSolutionStressStateEffectiveStresses:-Radial(horizontal);-Tangential(horizontal);-Axial(vertical);P7/19/202117.1-10TwoElasticSolutions:Late

7、Time-Pw=0,Pob=0EarlyTime-Pw=-Pi,Pob=PiStressStateStressBoundingEffectiveStresses:-Radial(horizontal);-Tangential(horizontal);7/19/202117.1-11FEASubroutinesExcelbasedpre-processorwithdefaultmeshesAxisymmetricaland3DproblemssolversSimplepostprocessorASCIIexportformatforFEAvisualization