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1、NiagaraFallsBanff,Alberta,CanadaInstructor:Dr.FarzamJavadpourfarzam.javadpour@beg.utexas.eduTel.(512)232-8068Office:BEG,3.132CFall2010GEO391AdvancesinUnconventionalShaleGasResourcesLecture17&18 11/01/2010 LogInterpretationandnanoporesofShaleGasShaleGasPetrophysicalAnaly
2、sisObjectivesLogcalibrationwithcoredataDeterminationofshalepetrophysicalpropertiesDeterminationofadsorbedandfreegasDeterminationofhydrocarbonporevolumeDataneededCoreanalysis:porosity,permeability,graindensity,watersaturation,oilsaturationX-raydiffraction:MineralogyGeochem
3、istry:TOC,RockEval,VitriniteAdsorptionisothermsforarangeofTOCGascompositionReservoirpressureandtemperatureTriplecombologTotalgasstoredinshalegasstrataDifferencesinshalegaspetrophysicsandconventionalreservoirsRw?Complexmineralogy:clays,quartz,kerogen,pyrute,carbonates,fluo
4、raptite,chert,etcDensitylog:seeskerogenas“porosity”GraindensitycanbevariableGasstorage:freeandadsorbedLowporosities:2-9%Non-ArchierocktypesPorosityShalegasresponsesSpectralGammaRay-TOCGammaraylogcanindicateTOCcontentRequirescoredatacalibrationNotalltheGammarayssourcedfrom
5、organicmaterialsBasictriplecombologCore-Logrelations:KerogenandTOCKerogencontentRhoBCore-Logrelations:KerogenandTOCGammarayKerogenCore-Logrelations:clayvolumeXRDclay(Illite)SpectralUraniumfree10cmCore-Logrelations:clayvolumeXRDclayDensity-NeutrondifferenceCore-Logrelation
6、s:Mineralmodel(Pyrite)PyriteishighdensityandoftencontrolsgraindensityinshalesPEFXRDpyriteGraindensityXRDpyriteCore-Logrelations:porosityPorosityQuartzCalciteKerogenClayPyriteCalculatingporosityusingmatrixvolumes,ifknown;Porosity=1-Vp-Vcalc-Vcl-Vk-VqtzCore-Logrelations:por
7、osityGRIporosityandsonic(DT)logSonic-DTGRIporosityCore-Logrelations:porosityGRIporosityandDensitylogRhoBGRIporosityCore-Logrelations:SwPorosityinKerogenisgas-filledSwTOCCore-Logrelations:PermeabilityReasonablerelationbetweenGRImatrixpermeabilityandgassaturationGRIk(nD)GRI
8、SgCore-Logrelations:AdsorbedgasIsothermdatayieldstheadsorbedgascontentatreservoirconditionLinear
