21 蒋旭华-页岩气总有机质含量及其地质力学属性的地震响应定量分析

阿派斯科技（北京）有限公司页岩气总有机质含量及其地质力学属性的地震响应定量分析蒋旭华QUANTITATIVEANALYSISOFSEISMICRESPONSETOTOTAL-ORGANIC-CONTENTANDGEOMECHANICALPROPERTIESINSHALEGASPLAYSIkonScienceAPAndDepartmentofPetroleumEngineeringCurtinUniversityJuly,2011PresentationOutline•Shalegas•RockphysicsmodelingandQI•Shale’srockfabricandAnisotropy•Casestudy:USA•SummaryPresentationOutline•Shalegas•RockphysicsmodelingandQI•Shale’srockfabricandAnisotropy•Casestudy:USA•SummaryShaleGasImportanceProductionSupplyShaleGasGeologyShaleswithrightcombinationofshaletype,organiccontent,maturity,permeability,porosity,gassaturationandnaturalfracturingarebeingconsideredproductiontargets.AfterBoyeretal(2006)ThresholdsofShaleGasPlayVanKrevelenDiagramOilOilandGasGasPresentationOutline•Shalegas•RockphysicsmodelingandQI•Shale’srockfabricandAnisotropy•Casestudy:USA•SummaryCompressionalShearRockPhysicsModelingFluidSubstitutionandAVO/AVAPhase4Interpretation,RockPhysics,1D&2DModeling&ElasticPropertyAnalysisPhase1Phase2RokDoc-1D2DSeismicQC,Well-Tie,WaveletsPhase3Porosity,LithologyandSaturationcubesPhase6Phase5Relative/Absolute/StochasticInversiontoOptimumImpedancePropertiesColouredInversionJointStochasticInversionBandlimitedInversionRockPhysicsModelNeuralNetBayesianClassification(MostlikelyandProbability)RokDoc-3D4DSpectralInversionPilotInversionSeismicDataConditioning(Spectralequalisation,Cross-equalisationofPhaseandtimeshifts)(OPTIONAL)QuantitativeInterpretationWorkflowPresentationOutline•Shalegas•RockphysicsmodelingandQI•Shale’srockfabricandAnisotropy•Casestudy:USA•SummaryMatrixandPoreGeometryofShaleNanoscaleStiffnessTensorTransverselyIsotropicMediaBarnettShaleStiffnessParametersThomsenparametersProductivezoneAfterChesnokovetal(2010)PresentationOutline•Shalegas•RockphysicsmodelingandQI•Shale’srockfabricandAnisotropy•Casestudy:USA•SummaryCarbonateShalePlayShaleLineIdentifyingTOCSweetSpotsUsingthePassey–Bowmancross-plottingmethod,Shaleplayscanbeidentifiedbasedonwirelinewelldata.ResistivityDTDtRGRTOCGRP-sonicLog-ResistivitySwMu.RhoLambda.RhoGeomechanicalPropertiesofShale(TopBarnetttoBaseWoodford)Ductile&LowMaturityMu.Rho(GPa_g/cm3)Brittle&MatureLambda.Rho(GPa_g/cm3)GRDTDtRDtR-DTTOCGRGRDuctileMu.Rho(GPa_g/cm3)BrittleLambda.Rho(GPa_g/cm3)Cross-plotinterval:ShaleintervalGeomechanicalPropertiesofShaleGRVp/VsSI-wellSI-inversionAI-wellAI-inversionVshaleBackground:Lambda.RhoMu.RhoTopHornValley30mOriginalCDPGatherAnisotropicSyntheticGatherIsotropicSyntheticGatherIsotropic/AnisotropicAVOModellingSeismicResponsetoTOCContentHighTOCContentShaleMidTOCContentShaleLowTOCContentShaleSummary•MappingTOCcontent,porosityandgassaturationofshaleplaysisfeasibleduetohighcorrelationwithacousticimpedance.•Brittleshalezonescanbemappedbaseonlambda.rhoversusmu.rhocross-plotanalysis.•Goodqualitymulti-stackseismicdataiskeytoreliableGeomechanicalanalysisandanisotropymodelingofshaleplays.•Anisotropicpropertiesofshalecanbeusedtomapproductivezonesifadequatedipoleshearandcompressionalsonicdataisavailable.THANKYOU...