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AVOanalysisingeneral,islimitedbytheassumptionsandapproximationsinherentinsurfaceseismicacquisition,processing,andinterpretationInthispaper,we willreviewthebasicprinciplesofAVOandintroducesomeamplitudepreservingalgorithms.Atestmoredefinitivethanbrightspotsonastackedsectionwas soughtforthedirectdetectionofgasonseismicrecordsTheAVO(amplitudevariationwithoffset)techniqueassessesvariationsinseismicreflectionamplitude withchangesindistancebetweenshotpointsandreceiversItisusuallytruethat,inlookingintothefuture,peoplecanbenefitbyreviewingtheaccomplishmentsof thepastPermalink:FiguresInthispaper,wewillreviewthebasicprinciplesofAVOandintroducesomeamplitudepreservingalgorithmsSincethen,manyInthis paper,wereviewmanyofthemilestonesinthedevelopmentofAVOmethodologyconcerningtheprinciplesofAVOanalysis,themethodsofseismicdata processingforThisbookdescribestheuseofonesuchtest,theanalysisofamplitudevariationwithoffset(AVO)Engineering,GeologyItisusuallytruethat,in lookingintothefuture,peoplecanbenefitbyreviewingtheINTRODUCTION.SeismicdataprocessingsequencesforAVOanalysisandsomealgorithmsfor AVOAreviewofAVOanalysis.Inthispaper,wereviewmanyofthemilestonesinthedevelopmentofAVOmethodologyconcerningtheprinciplesofAVO analysis,themethodsofseismicdataprocessingforAVOanalysis,theapplicationsDryholesdrilledintobrightspotsfoundigneousintrusions,carbonateorhard streaks,lignites,orwetsandsSeismicdataprocessingsequencesforAVOanalysisandsomeAbstract Thetheoryoffrequency-dependentamplitudever-sus offset(AVO)wasdevelopedforpatchy-saturatedmodelOneoftheoutputsoftheanalysisisasetofdirectAreviewofAVOanalysisAVOanalysisallows geophysiciststobetterassessreservoirrockproperties,includingporosity,density,lithologyandfluidcontentInthispaper,wereviewmanyofthemilestonesin thedevelopmentofAVOmethodologyconcerningtheprinciplesofAVOanalysis,themethodsofseismicdataprocessingforAVOanalysis,theapplicationsof AVOandthetechniquesinAVOanalysistheoreticalobservationswithrealseismicdataanddeterminedthatAVOcouldbeusedasamethodofdetectinggas sands(Coulombeetal,)Inthiswork,weconsiderthistheoryinthecaseofcommonstartingpointforAVOanalysisisthelinearizedtermapproximationtothe Knott-ZoeppritzequationsforthepartitioningofangledependentP-waveandS-waveenergyacrossaboundarybetweentwoelasticlayers,isgivenbyAkiand Richards()shownbelowinequation(1)ABSTRACTTheGeostacktechniqueisamethodofanalyzingseismicamplitudevariationwithoffset(AVO)infor mationThisbookdescribestheuseofonesuchtest,theanalysisofamplitudevariationwithoffset(AVO)HongboZhangRJBrownofAVOAnalysis,by CastagnaandBackus,andAmplitudeVariationwithOffset:GulfCoastStudies,byAllenandPeddy––werepublishedbySEG(bothin)