Drillbench-Dynamic-Well-Control

1Drillbench®DynamicWellControl2Overview•History•ModelBasics•UserInterface•Verification•Applications3History•Multiphaseflowmodel–ModeloriginatesfromRogalandResearch–Modelinghasbeensupportedbyextensiveverificationworkwithfullscaledata;bothexperimentsandrealwells–ContinuousdevelopmentbyScandpowerPetroleumTechnology4ModelBasic•Dynamicmodel–Akickentersthewell–Thewellisclosedinandwellpressuresstabilises–Thekickiscirculatedout–Aheavykillmudisplacedintothewell•Conservationofmassandtotalmomentum–Mud–Freegas–Dissolvedgas–Formationoil•Equationsetissolvedbyafinitedifferencetechniquewith–Asetofsubmodelsforphysicalproperties–Boundaryconditionsdefinedforvariousmodes•Circulation•Closedinwell5Summarywindow6Descriptioninput7Surveydatainput8Editunits9Wellgeometryinput10Library11String/BHAdatainput12Visualizedinput13Geometry•3Dwellprofile•Wellgeometry–Riser–Casing/liner–Openhole•Drillstring–BHA–Bit•Surfaceequipment14Pressurelosses•Frictionalpressuredrop–Laminarandturbulentflow–Rheologymodels–Pressureloss•Flowareachanges•BHA/Bit•Chokevalve/chokeline–2-phaseflow15Geometry16Geometry17Geometry18Geometry19Surfaceequipment20Surfaceequipment21Longchokeline(offshore)22Surfaceequipment23Kickdetectionevaluation24Fracturestrengthinput25Mudinput26Hydrostaticpressure•Hydrostaticfrommudweight(density)–Muddensity•Components:baseoil,water,weightmaterials,influxfluid•Influxfluids:freegas,dissolvedgas,formationoil•Dependentonpressureandtemperature•Accountingforweightofcuttings27Mudinput28OBMvsWBM29Mudinput30PVTmodels•Compositional–Baseoilcomposition•Predefinedalternatives•Measureddata–Reservoirfluidcomposition•Predefinedinfluxalternatives•Measureddata–EquationofState–Physicalmodeling•Blackoilmodel(empirical)–MaynotbevalidforHTHPconditions•Measureddata(tabular)31CompositionalPVT32MeasuredPVT33Reservoirinput34Influxmodel35Reservoirmodelvs.Constantinflux36Reservoirfluid37Reservoirfluid38ChokepressureduringkillGasBreakoutMethaneWBMMethaneOBMBlackOilOBM39Temperatureinput40Dynamicsimulation•Hydrostatichead•Frictionalpressurelosses•Densityvariations:pressureandtemperature•Densityvariations:compositionsofmudandinflux•Viscosityvariation:pressure,temperature&velocity•HPHTrheology•Dynamicsofdissolutionofgasinmud•Risevelocityoffreegas•Reservoirdynamics•Lostcirculation41Degasserinput42Degasserplots43Degasserblowout44Interactivesimulation45Interactivesimulation46Plotlayout47Batchsetup48Bachsimulations49Automaticbatch50Verification•ExperimentalworkatRogalandResearch–Fullscaleresearchdrillingrig–Laboratorytests•TestedalargenumberofHPHTmuds–Fieldmuds–Basefluids–Variousfluidcompositions•Maxpressure1500bar•Maxtemperature220°C•Measured–Compressibility–Thermalexpansion–Rheology–Solubilityofgas51PressureFlow010203040506070Time(min)125130135140145150Pressure(bar)SimulatedMeasured0102030Time(min)0500100015002000Flowout(l/in)SimulatedMeasuredVerificationFlowout[l/min]Pressure[bar]52UserInterface•Easytogetstarted–Defaultvalues–Importandexportofdata–Useradvices–Help•Easytouse–Uniqueworkspace–Simulation”movie”–Multiplerunsinonewindow–Powerfulgraphics–Library–Advancedoptions53Applications•Allwells•Kicktolerance•Casingdesign–Settingdepths–Pressure•Surfacecapacity•Wellcontrolprocedures•Postanalysis•Education/training54bedynamic