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1、●D.,RESERVOIR/k“,ENGINEERING~*ReservoirLimitTestonGasWellsPARKJONESU,OFHOUS1ONMEMBERAlMEIHOUSTON,rEX.Abstractwater.Fig.1Disforawellnear”anonsealingfaul~.ThetestwasstoppedattheendofthefirstdayofproductionDuringareservoirl[mfttest,therateofproductionisbecausetherateo
2、fgasflowacrosstlienonsealingfaultheldconstantandthebottom-holeffowingpressure{swasequaltotherateofproductionfromthewell,Addi-measured.Fieldexamplesforaclosedreservoir,asealingtionalreservescannotbedetectedaftertherateofleakagefault,agas-watercontactandanonsealingfa
3、uitarein-becomesequaltotherateofproduction.chided.TheinterpretationoffielddataismadewiththeInterpretationofthefielddataobtainedduringareser-aidofthe“observedrateofpressuredecreaseperunitratevoirlimittestismadewiththeaidofcertainequations.ofproduction.Graphsandequat
4、ionsarepresentedforthedevelopedbyJones,’pressureinterferencescommonlyfoundingasreservoirs.Thethousandcubicfeetofgasinplaceprovedandpos-CoetlicientofExpansionforReservoirGassiblyexploredduringareservoirlimittest,thedistancetoafauit,theangIebetweentwointersectingfard
5、ts,theWhenawellisplacedonproduction,apressuredraw-interferencefromagas-watercontact,theevacuationofdownispropagatedintothereservoir,andthedrainagetheformationconstantsandtheeflectofanisotropicper-radiusforthewellincreaseswithtime,Thedrawdownmeabilityareconsidered.w
6、ithinthedrainageradiuscausesthein-placegastoexpand.Thecoefficiec:ofexpansionE.foragasisde-Introductionfinedby1azThereservoirlimittestisatransient-flowmethodof(1)“=F-Z%’”””’””””“evaluatingin-placegas,productivelimitsanddeliverabilityy.SolutionsofEq.1areplottedinFig.
7、2foriSO*Freser-Backgroundforthetestisthreefold:thecorktant(psi/voirs,gasgravitiesfrom0.6to1.05,andpressuresfrombbl)pressuredeclineforsteadyflowinaclosedreser-i,000to15,000psia,Similardataareavailablefor250°voi~thepressureinterferencesbetweenwei[sunder”aand350”Fgasr
8、eservoirs.TheE~valueswerecalculatedtransientflowconditionas,forexample,thoseinthefromthecompressibilityfactorsofBrown,etal:paperbyE1kins’;andtheL
