气藏工程（双语）智慧树知到期末考试答案章节答案2024年中国石油大学（华东）

气藏工程（双语）智慧树知到期末考试答案+章节答案2024年中国石油大学（华东）Forareservoirwherethepressurehasbeendepleted,theMatthews-brons-Hazebroek(MBH)methodcanbeusedtoestimatetheaveragedrainage-areapressure.

答案:对Inreality,onlyflowratesandpermeabilityatwellscanbemeasureddirectly.

答案:错Conventionalbuilduptestanalysistechniqueshavebeendevelopedprimarilyforwellsproducingatavaribleratebeforeshut-in.

答案:错Intheexponentialcapacityequationofagaswell,themainfactorsaffectingthecoefficientCarepressureandtemperature.

答案:错Wecannotestimatetheindividualwellflowingcharacteristics,suchasformationpermeabilityandskinfactor,withdecline-type-curveanalysistechniques.

答案:错Fromthesemiloggraph，theoriginalreservoirpressure,isestimatedbyextrapolatingthestraightlinetoinfiniteshut-intime.

答案:对Accordingtoprincipleofsuperposition,thetotalpressureatanypointcausedbyflowineachwellinthereservoir.

答案:错Cgisdefinedastherateofchangeinvolumeperunitvolumeofgasunderisothermalconditions.

答案:对Theisothermalcompressibilitycoefficientisessentiallythecontrollingfactorinidentifyingthetypeofthereservoirfluid.

答案:对Material-balancemethodsprovideasimple,buteffectivemethodforestimatingnotonlyoriginalgasinplacebutalsogasreservesatanystageofreservoirdepletion.

答案:对GBgi=(G-Gp)Bg+(We-Wp)Bwisthematerialbalanceequationofdry-gasreservoirswithwater-influx?

答案:错Darcybehaviorcanoftenbemodeledasrate-dependentskin.

答案:错Thefinalformdimensionlessofthediffusivityequationappliestoallfluids.

答案:对Thefirststepinthenon-dimensionalizationofthediffusionequationistodefineadimensionlessradius.ThedefinitionisrD=r/rw.

答案:对Afundamentaldifferentialequationobtainedbycombiningthe().

答案:continuityequation###flowlaw###equationofstateThederive-equationforvolumetricgasreserviorscanbemodifiedby().

答案:Compressibilityofconnatewater###Waterinflux###rockPVThenaturalgasiscomposedofhydrocarbongasesandnon-hydrocarbongases,suchas().

答案:carbondioxide###nitrogen###hydrogensulfide###watervapor###carbonmonoxideDatausedtoestimatethegas-bearingreservoirporevolumeinclude,butarenotlimitedto().

答案:welltests###coreanalyses###fluidsampleinformation###welllogs###bottomholepressureAssumedconditionofidealgas:thevolumeofthegasmoleculesiscomparedwiththetotalvolumeenclosingthegas;noattractiveorrepulsiveforcesexistamongthemoleculesorbetweenthemoleculesandthecontainerwalls;allmoleculecollisionsareperfectly().

答案:insignificant,elasticThereservoirfluidsrefertonotonlynaturalgases,butalso().

答案:crudeoil###formationwatersPressure-transienttestreferstoatestinwhichwegenerateandmeasurepressurechangesinawellasafunctionof().

答案:timeTheaveragepressureinthedrainageareaofawellrepresentsthe()forfluidflowandisusefulinmaterial-balancecalculations.

答案:drivingforceWhichofthefollowinggasreservoirshasthegreatestimpactontheslippageeffect?()

答案:LowpermeabilitytightgasreservoirDynamicviscositydependsonpressure,temperatureand().

答案:gascompositionGaswellsareproducedatconditionsapproximatingconstantwell-headpressureorvariablebottomholerates,ratherthanatconstantbottomholerates,inmostgasfieldoperations.

答案:对Thetotalpressuredropatanypointinareservoiristhesumofthepressuredropsatthatpointcausedbyflowineachwellinthereservoir.

答案:对Thespecificgravityofagasisdefinedasthedensitiesofthegasandairwhenbotharemeasuredatthesametemperatureandpressure.

答案:错Ifthesizeofthedrainageareachanges,thecharacterofthewell'sdeclinewillalsochange.

答案:对Theformationvolumefactorofreservoiroilsoftenlowerthan1.

答案:错Radiusofinvestigationisthedistancethatapressuretransienthasmovedintoaformationflowingaratiochangeinawell.

答案:对Volumetricmethodscannotbeappliedlaterinareservoir'slife.

答案:错Anychangesinfielddevelopmentstrategiesorproductionoperationpractices,however,couldchangetheproductiontrendsofawellandsignificantlyaffectreserveestimatesfromdecline-curvetechniques.

答案:对Dataobtainedunderthesenon-idealtestconditionscanbeanalyzedaccuratelywithasimplemodificationofthetransientflowequationforvariable-rateproduction.

答案:错Basedonthematerial-balanceequation,theremaininghydrocarbonmass=originalhydrocarbonmass-producedhydrocarbonmass.

答案:对Thevolumeof1molofgasat60℉and14.7psiis380.7ft3

答案:对Inradiusofinvestigation,pressuredisturbancecausedbyproductionmovesfurtherintothereservoirasflowtimeincreased.

答案:对Iflog-tproductiondeclinecurveislinear,itindicatesharmonicdecline.

答案:错TheCartertypecurveisbasedonfinite-differencesolutionstotheradialgasflowequationsforproductionatconstantBHP.

答案:对Ifthereservoirpressureisabovethedewpointpressureandthetemperatureliesbetweenthecriticaltemperatureandthecricondentherm,thenonlygasexistsinthereservoir.

答案:对Factorsaffectingthecalculationofreservesare()

答案:Effectiveporosity###Averagegassaturation###Effectivethicknessofoillayer###Gas-bearingareaGasreservoirscanbedividedinto().

答案:Condensatereservoir###Gasandwaterlayer###PuregaslayerThecompositionofnaturalgasmaybeexpressedas().

答案:molefraction###massfraction###volumefractionForthecaseofconstant-rateliquidproduction,weassume().

答案:uniformpressurethroughoutthereservoirbeforeproduction###constant-rateproductionfromasinglewellofradiuscenteredrwinacylindricalreservoir###noflowacrossthereservoirouterboundaryatradiusreWhichsolutionsareparticularlyusefulinwelltesting?().

答案:Thesolutionforaboundedcylindricalreservoir###Thesolutionthatincludeswellborestorageforawellinaninfinitereservoir###Thesolutionforaninfinitereservoirwithawelltreatedasalinesourcewithzerowellboreradius###Thepseudosteady-statesolutionThevolumetricmethodscanbeusedtocalculatetheGIIPfor().

答案:volumetricwet-gasreservoirs###volumetricgas-condensatereservoirs###volumetricdryreservoirs###dry-gasreservoirswithwaterinfluxWhatconditionsneedtobeconsideredinunsteady-flowequation?

答案:Compressibilityequation###Transportequation###Continuityequation###InitialandBoundaryconditionsIncaseswherethecompositionofanaturalgasisnotavailable,thepseudocriticalpressureandpseudocriticaltemperaturemaybepredictedsolelyfromthe()ofthegas.

答案:specificgravityTheformationvolumefactorofformationwateris()1.

答案:≈Whichofthefollowingistheinstantaneousproductionformulaofharmonicdecline（）.

答案:log[q(t)]=log(qi)-log(1+bDit)Whichofthefollowingsituationsindicatesthatthewellborehasbeendamaged?()

答案:Ks0Forthegasviscosity,viscosityofafluidisameasureforthe()offluidstoflow.

答案:internalresistanceWhichofthefollowingstatementsabouttheroleofwelltestingiswrong?()

答案:ProvidingabasisfordeterminingthetypeofgasreservoirdriveTheplotofloggasflowrate,q(t),vs.tisastraightlinefor()decline.

答案:exponentialForexponentialdecline,b().

答案:=0Theseconventionaldeclinecurvetechniquesincludeequationsfor()decline.

答案:alloftheaboveFromadrawdowntestconductedateitherconstantorsmoothlychangingrate,calculate()andskinfactorfrominformationinthetransientregion.

答案:permeabilityPressure-transienttestisclassifiedintosingle-welltestandmulti-welltest.

答案:对Todimensionlessformsofthediffusivityequation,weconsiderradialflowofslightlycompressibleliquidsbeingproducedatconstantrateandatconstantbottomholepressure.

答案:对Astheheavyhydrocarboncontentinthesystemincreases,thephaseenvelopepositionmovestotheupperright.

答案:错Thepressuredisturbance(orpressuretransient)causedbyproductionmovesfurtherintothereservoirasflowtimeincreases.

答案:对Whenusingadjustedpressureandadjustedtime,theHornertimeratioiscalculatedusingthepseudotime.

答案:错Theunsteady-stateflow(frequentlycalledtransientflow)isdefinedasthefluidflowingconditionatwhichtherateofchangeofpressurewithrespecttotimeatanypositioninthereservoirisnotzeroorconstant.

答案:对Foravolumetricdry-gasreservoir,thegasexpansionisthedominantdrivemechanismandtheexpansionsofrockandwaterarenegligibleduringtheproductivelifeofthereservoir.

答案:对Thespecificgravityofagasisdefinedastheratioofthedensitiesofthegasanddryairwhenbotharemeasuredatthesametemperatureandpressure.

答案:对Thegasrecoveryfactorfordry-gasreservoirwithwaterinfluxis.

答案:对Theflowrateofawellataconstantpressureboundaryandtheflowofits"image"wellshouldbesame,andthesignsshouldbepositive.

答案:错TheFetkovichdeclinetypecurvesarebasedonanalyticalsolutionstotheflowequationsforproductionatconstantBHPfromawellcenteredinacircularreservoirordrainageareawithnoflowboundaries.

答案:对Theformationvolumefactorofnaturalgasesoftenlowerthan1.

答案:对TemperatureaffectsthepenetrationofgasintotheformationbyaffectingSlipfactor

答案:对Thelaterconditionsoftenaredefinedasthereservoirpressureatwhichproductionisnolongereconomical.

答案:对Foranexponentialdecline,theplotofq(t)vs.Gp(t)willyieldastraightline.

答案:对threetypesofflowregimesareSteady-stateflow，Unsteady-stateflow，Pseudosteady-stateflow.

答案:对Theparameterthatmeasurestheporevolumeofareservoirrockandquantifiestheabilityofthereservoirtostorefluidispermeability.

答案:错Flowregimesofsteady-stateflow、unsteady-stateflowandpseudosteady-stateflowcandescribethefluidflowbehaviorandreservoirpressure.

答案:对Thegreatertheslippageeffect,thebiggerthedifferencebetweenhorizontalandverticalwellproductivity.

答案:错Threemethodscommonlyusedingaswellproductivitytest：Conventionalbackpressuretest、isochronouswelltestandcorrectisochronoustest.

答案:对Commonlyuseddynamicanalysismethodscouldbe().

答案:Productionaccumulationmethods###Material-Balancemethods###Gasproductioncurvemethod###Oil-pressure-reductionmethods）Theconcentrationofdissolvedsolidsinwatercanbemeasuredwithseveraldifferentunits,including().

答案:gramsofsaltperliter###partspermillion###gramsNaclperliter###weightpercentTheassumptionsofideal-reservoirmodelincludeHomogeneousandisotropicporousmedium,smallpressuregradients,applicabilityofDarcy’slawand（）.

答案:negligiblegravityeffects###uniformthickness###pressuredependentrockandfluidproperties###radialflowTheunconventionalgasoftenincludesgashydrateand().

答案:tightgas###coalbedmethane###shalegasCarterofferedimprovedaccuracybyplottingfunctionsthatincludethechangesofparameters()ingaspropertieswithpressure.

答案:Compressibility###ViscosityThezfactordependson(),canbemeasuredinthelaboratoryorobtainedfromcorrelations.

答案:pressure###gascomposition###specificgravity###temperatureDependonthevalueofthedeclineexponenthasdifferentforms,theseformsofdeclineare().

答案:hyperbolic###harmonic###exponentialWhichofthefollowingarethepseudo-pressureformsofp?()

答案:p2###pp###avgpTodevelopanalysisanddesigntechniquesforwelltesting,wemustmakeseveralsimplifyingassumptionsaboutthewellandreservoirbeingmodeled.Theseassumptionsareintroducedasneededtocombine().

答案:anequationofstate###theprincipleofmassconservation###anequationoffluidmotionAthree-stageseparationsystemconsistsofa()separator,a()separatoranda().

答案:low-pressure###stocktank###high-pressureFortheline-sourcewell,whataretheadditionalassumptions?

答案:Thewelldrainsaninfinitearea###ThewellhaszeroradiusThedry-gasreservoirmeansthatthereisnoliquidhydrocarbonforminthe()duringproduction.

答案:Wellbore###Reservior###SurfaceequipmentApplicationoftheFetkovichtypecurves,wecanestimate().

答案:gasreserves###permeability###reservoirporevolume###skinfactor###productivelifeFlowperiodsinaverticallyfracturedwellinclude().

答案:PseudoradialFlow###FormationLinearFlow###EllipticalFlow###BilinearFlow###FractureLinearFlowTheMethodsforestimatingwaterinfluxinclude().

答案:Carter-Tracymethod###vanEverdingen-Hurstmethod###FetkovichMethodSeveralgaspropertieshavethesamevaluesforsimilargases(suchasparaffinhydrocarbons)atidenticalvaluesof().

答案:reducedtemperature###reducedpressureTodealwithboundryproblems,whatmethodsdoweuse?

答案:Imagingmethod###No-boundrymethod###Multi-wellmethodWhataretheparametersthatcanbesolvedbythepressure-drawdowntestcurveofagaswell?()

答案:EffectiveporevolumeV###WellcontrolledreservesN###Gaslayerflowcoefficientkh/μThetypecurvesof()areparticularlyusefulingas-welldecline-curveanalysis.

答案:Fetkovich###CarterTheprimaryreservoircharacteristicsmustbeconsidered().

答案:Typesoffluidsinthereservoir###Numberofflowingfluidsinthereservoir###Flowregimes###ReservoirgeometryIfasignificantfractionofheavycomponentsispresentinthenaturalgasmixture,laboratorymeasurementsof()oftheC7+fractionarerequiredtousemixingrules.

答案:molefraction###themolecularweight###gravityAtvery()pressure,themoleculesarerelativelyfarapart,thebehaviorofrealgaslikesidealgas,soZ().

答案:low,=1Ina()reservoir,fluidflowsradiallyfromthereservoirtothewellbore.

答案:Homogeneous-acting###cylindricalTheeffectofnon-Darcyflowusuallyisincorporatedintofluidflowequationsasanadditional()thatisratedependent.

答案:skinfactor()isverydangerousinthegascomponents.

答案:H2SAtlowpressures,gasviscosity()astemperatureincreases.

答案:increasesTheFetkovichdeclinetypecurvesarebasedon()totheflowequationsforproductionatconstantBHP.

答案:analyticalsolutionHowcanweidentifydifferentflowregime?

答案:ByreadingP-tcurveOilformationvolumefactor:theratioofthevolumeofoilat（）tothevolumeofoilat().

答案:theprevailingreservoirpressureandtemperature,standardconditionsConditionsforthedevelopmentofgasreservoirsusingexhaustivedevelopmentdonotinclude()

答案:GoodgeologicalconditionsHowmanymethodscanwestudyfluidflowinporousmedia?

答案:2Whichofthefollowingisnotamethodforrepresentingthecompositionofnaturalgas.()

答案:VolumefractionCartercorrelatedrate/timebehaviorduringboundary-dominatedflowwithaparameter,λ.Liquidflow,characterizedbyarelativelyconstantvalueoftheviscosity-compressibilityproduct,isrepresentedby().

答案:λ=1Pseudopressureandpseudotimeprovideexcellentresultswhenusinganalysismethodsfor()toanalyzegaswelltests.

答案:slightlycompressibleliquidsTheoilpressureinthegasproductioncurvedropssignificantly,thewaterproductiondecreases,andthecasingpressuredoesnotchangesignificantly.Thepossiblereasonis()

答案:WellboreeffusionPseudoreducedtemperatureistheratioof()to().

答案:T,TpcThetotalcumulativegasproductionisthedifferencebetweenoriginalgasinplaceandgasinplaceatsome().

答案:abandonmentconditionsThesolutionofgas-oilrationishorizontalatpressuresabovethebubble-pointpressurebecauseatthesepressures()andtheentireliquidmixtureisproducedtothewellbore.

答案:nogasisevolvedintheporespaceThewellbore()stateflowpressureofgaswellcanbeexpressedbypseudopressureandpseudotime,pressureandtime,adjustedpressureandtime,pressuresquareandtime.

答案:unsteadyToaccountfortheunsweptportionsofthereservoir,weintroducea()intothevolumetricequation.

答案:volumetricsweepefficiencyTheoriginalreservoirpressureisobtainedbyextrapolatingthemiddle-timesemilogstraightlineto().

答案:(tp+Δt)/Δt=1Wemodela()rategasflowtestusingsuperpositionintimemethod.

答案:variablInthepressuredrawndowntest,theslopeofthestraightlineofpvslogtcancalculatethereservoir().

答案:permeabilityTheplotofadjustedshutinBHP,fromabuilduptestasafunctionofthelogoftheadjustedHornertimeratiofunction,weCANNOTcalculateparametersof().

答案:actualskinfactorThebasisofwell-testanalysisforhomogeneous-actingreservoiris().

答案:theline-sourcesolutiontothediffusivityequationTosolvethearps’equation,weneedtocalculatethreeparametersof().

答案:declineexponent###initialflowrate###initialdeclinerateIngasreservoirwith(),non-Darcyfloweffectsmaycausesubstantialerrorsinestimatesoftheapparentskinfactor.

答案:k>0.1mdFortheharmonicDecline,thedeclineexponentis().

答案:equalto1TheArps’declineequationisbasedonimportantandwidelyviolatedassumptionsincluding().

答案:constantBHP###boundarydominatedflow###unchangingdrainagearea###constantkandsThebasisofdeclinecurveanalysisisthatfutureproductioncontinuestofollowthepasttrend,wecanusethesemodelstoestimate().

答案:ultimategasreserves###formationpermeability###skinfactor###remainingproductivelife###originalgasinplace（）calledconstantpercentagedecline,ischaracterizedbyadecreaseinproductionrateperunitoftime.

答案:exponentialForexponentialdecline,therearesomestraightlinesof().

答案:qVSGp###lgqVStUsingvolumetricmethod,theoriginalgasinplacecanbecalculatedby().

答案:areas###watersaturation###porosity###FVFofgasininitial###thicknessThedominantdrivemechanismofnormalvolumetricdrygasreservoiris()asreservoirpressuredecreases.

答案:gasexpansionIfweanalyzethegeopressuredreservoirusingtechniquesfornormallypressuredreservoirs,wewill()theoriginalgasinplace.

答案:OverestimateTodevelopthematerialbalanceequationforavolumetricgeopressuregasreservoirs,thedrivemechanismincluding()duringtheproductivelifeofthereservoir.

答案:rockexpansion###waterexpansion###gasexpansionBecauseofreservoir(),theencroachingwaterdoesnotsweepsomeportionsofthereservoireffectively.

答案:discontinuities###heterogeneitiesMaterialbalancemethodsprovideasimpleandeffectivemethodsforestimating()atanystageofreservoirdepletion.

答案:originalgasinplace###recoveryfactor###gasreservesThedrygasesatthes