Archivio Istituzionale della RicercaReliable3Dmodellingofundergroundhydrocarbonreservoirsisachallengingtaskduetothecomplexityofthe undergroundgeologicalformationsandtotheavailabilityofdifferenttypesofdatathataretypicallyaffectedby uncertainties.Inthecaseofgeologicallycomplexdepositionalenvironments,suchasfracturedhydrocarbon reservoirs,theuncertaintiesinvolvedinthemodellingprocessdemandaccurateanalysisandquantificationin ordertoprovideareliableconfidencerangeofvolumetricestimations.Inthepresentwork,weuseda3Dmodelof afracturedcarbonatereservoirandpopulateditwithdifferentlithologicalandpetrophysicalproperties.The availabledatasetalsoincludedadiscretefracturenetwork(DFN)propertythatwasusedtomodelthefracture distribution.Uncertaintiesaffectinglithologicalfacies,theirgeometryandabsolutepositions(relatedtothefault system),fracturedistributionandpetrophysicalpropertieswereaccountedfor.Weincludedalldifferenttypesof uncertaintiesinanautomatedapproachusingtoolsavailableintoday’smodellingsoftwarepackagesand combiningalltheuncertaininputparametersinaseriesofstatisticallyrepresentativegeologicalrealizations.In particular,wedefinedaspecificworkflowforthedefinitionoftheabsolutepermeabilityaccordingtoan equivalent,singleporosityapproach,takingintoaccountthecontributionofboththematrixandthefracture system.Theresultsoftheanalysesweretransferredintoa3Dnumericalfluid-dynamicsimulatortoevaluatethe propagationoftheuncertaintiesassociatedtotheinputdatadowntothefinalresults,andtoassessthedynamic responseofthereservoirfollowingaselecteddevelopmentplan.The“integratedapproach”presentedinthis papercanbeusefulforalltechniciansinvolvedintheconstructionandvalidationof3Dnumericalmodelsof hydrocarbon-bearingreservoirsandcanpotentiallybecomepartoftheeducationaltrainingforyounggeoscientistsandengineers,sinceanintegratedandwell-constructedworkflowisthebackboneofanyreservoir study.
Coping with uncertainties through an automated workflow for 3D reservoir modelling of carbonate reservoirs / Benetatos, Christoforos; Giglio, Giorgio. - In: GEOSCIENCE FRONTIERS. - ISSN 1674-9871. - ELETTRONICO. - 12:(2021). [10.1016/j.gsf.2019.11.008]
Coping with uncertainties through an automated workflow for 3D reservoir modelling of carbonate reservoirs
Christoforos Benetatos;Giorgio Giglio
2021
Abstract
Reliable3Dmodellingofundergroundhydrocarbonreservoirsisachallengingtaskduetothecomplexityofthe undergroundgeologicalformationsandtotheavailabilityofdifferenttypesofdatathataretypicallyaffectedby uncertainties.Inthecaseofgeologicallycomplexdepositionalenvironments,suchasfracturedhydrocarbon reservoirs,theuncertaintiesinvolvedinthemodellingprocessdemandaccurateanalysisandquantificationin ordertoprovideareliableconfidencerangeofvolumetricestimations.Inthepresentwork,weuseda3Dmodelof afracturedcarbonatereservoirandpopulateditwithdifferentlithologicalandpetrophysicalproperties.The availabledatasetalsoincludedadiscretefracturenetwork(DFN)propertythatwasusedtomodelthefracture distribution.Uncertaintiesaffectinglithologicalfacies,theirgeometryandabsolutepositions(relatedtothefault system),fracturedistributionandpetrophysicalpropertieswereaccountedfor.Weincludedalldifferenttypesof uncertaintiesinanautomatedapproachusingtoolsavailableintoday’smodellingsoftwarepackagesand combiningalltheuncertaininputparametersinaseriesofstatisticallyrepresentativegeologicalrealizations.In particular,wedefinedaspecificworkflowforthedefinitionoftheabsolutepermeabilityaccordingtoan equivalent,singleporosityapproach,takingintoaccountthecontributionofboththematrixandthefracture system.Theresultsoftheanalysesweretransferredintoa3Dnumericalfluid-dynamicsimulatortoevaluatethe propagationoftheuncertaintiesassociatedtotheinputdatadowntothefinalresults,andtoassessthedynamic responseofthereservoirfollowingaselecteddevelopmentplan.The“integratedapproach”presentedinthis papercanbeusefulforalltechniciansinvolvedintheconstructionandvalidationof3Dnumericalmodelsof hydrocarbon-bearingreservoirsandcanpotentiallybecomepartoftheeducationaltrainingforyounggeoscientistsandengineers,sinceanintegratedandwell-constructedworkflowisthebackboneofanyreservoir study.
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https://hdl.handle.net/11583/2780253