product flyer_blueback odisi
TRANSCRIPT
CEGAL.COM
*Petrel is a mark of Schlumberger
• Jointlyinvertstobothfaciesandrockproperties(Porosity,nettogross)
• Simultaneousinversionofcolorinvertedanglestacks
• Followsrealwellfaciesdistributions
androckpropertiesbycomputingthousandsofstatisticallycorrectpseudowellspertrace
• Nolowfrequencymodelrequired• Nolateral/spatialconstraints
• Bestmatchingpseudowellsarese-lectedtoproviderockpropertyvaluesandtheirassociateduncertainties
HIGHQUALITYIMAGESOFRESERVOIRPROPERTYESTIMATESANDASSOCIATEDUNCERTAINTIES
3DviewsofNetFraction,apartoflithofaciesandhigherporosityzonesaftervoxeltransparencyatthetargetreservoirzone
BLUEBACKODISIONEDIMENSIONALSTOCHASTICINVERSIONBLUEBACKODiSIisaOneDimensionalStochasticIn-version method that produces high quality reservoirproperty estimates with associated uncertainties, topredictnetfraction,porosityandlithofaciesdistributioningeologicalplays.
Itisauniqueseismicinversionmethodthatspecificallyincludesonlythemostrobustpriorinformationinordertoapplyadditionalconstraintstothesolution.
BluebackODiSIdoesnotrequireanypriorlateralcon-straints: the algorithm converges so that each tracecanbeinvertedindependentlyofitsneighborsyetlat-erallycontinuityisstillachieved.
The technologywas originally developedbyBP (Con-nolly&Hughes,2013,2014,2016)whileaPetrel*ver-sionhasbeendevelopedjointlybyCegalandBP.
Thesolutionisrobustyetlogicalandcomesfullyinte-gratedintoPetrel,complementingCegal’sQuantitativeInterpretationsolutionBluebackRocksQI.
INPUT
ColorInvertedExtendedElasticImpedance(EEI)
OUTPUT
ODiSIInvertedNetFractionODiSIInvertedLithofacies
01SEISMICDATACONDITIONING
Checkforzerophase,frequency,spectralandampli-tudebalance
Createinterceptandgradientvolumes
02EEIWORKFLOWFindoptimumCHIangles
Normally,fluidandlithologyanglevol-umesarerequired
03IMPEDANCEINVERSIONApplyBayesianInvertseismicdatausingwell-provedColoredInversion
04WELLLOGS
Conditionwelllogdata
Createdrybulkandshearbulkmoduluslogs
Createafacieswelllog
05NOTREQUIRED
Wellsdonotneedtobetied
Waveletsdonotneedtobeextract-ed-frequenciescomefromthecolorinversionoperator
06ODISI
Createparameters
StatisticsQC
InversionQC
Inversion(multi-threadedprocess)
GENERALWORKFLOW
ToperformanBluebackODiSIinversion,theinputdataneedstobequalitycheckedandconditioned.ThenecessarytoolstopreparethedataareavailableintheCegalquantitativeinterpretationsoftwareBluebackRocksQI.
StochasticInversionbymatchingtolargenumbersofpseudowellsworkflows
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