地震記錄信噪比估算方法研究.pdf

1、成都理工大學碩士學位論文地震記錄信噪比估算方法研究姓名：王紅玲申請學位級別：碩士專業(yè)：應用地球物理指導教師：鐘本善20070501ABSTRACTTheresearchofmethodstoestimatesignaltonoiseratioofseismicrecordABSTRACTSincedataprocessingisusedinoilprospecting，Peoplecontinuouslyseeksuitablemeth

2、odtoenhancesignalto—noiseratiofullscaleThusitismoreimportanttoestimatethesignal—tonoiseratiooftheseismicdataInordertOestimatequantitativelysignaltonoiseratiokindsofmethodstoestimatesignaltonoiseratioariseatthehistoricmom

3、entCommonmethodsinclude：stack、relatedmutualcorrelation、SVDintime—doraail“1、statisticalaverageanalysis、SVDinfrequency—domain、estimateinfrequencyandtimeshiftingcorrelationmethodproposingrecentlyIncertainconditionscommonmet

4、hodstoestimatesignal—to—noiseratioCanestimatetheseismicrecordsthatonlyincluderandomnoiseButtheseismicdataiSmorecomplexwhileseismicsurveydevelopinginmoredifficultareainthewestofourcountry0ncetheseismicrecordscontaincorrel

5、atednoise，suchaslinearnoise、groundrollinterference、multiples，thecommonmethodsestimateworse，evenobtainthewrongconclusionthatthesignaltonoiseratiobeforeeliminatingnoiseiShigherthanaftereliminatingnoiseForthisreasonitiSanur

6、gentdutythatlookingforthemethodtoestimatesignalto—noiseratioofthesecomplexseismicdataForthis，thePaDerpreliminarydiscussthesequestionsandmakesomeprogressFirstthepapercontrastandappraisalsomebettermethodsinestimatingsignal

7、—to—noiseratiobyfar：relatedmutualcorrelation、estimateinfrequencyandtimeshiftingcorrelationmethodbydesigningmanymodels，suchasleveleventonlycontainrandomnoise、inclinedevent、reflectionhyperbolaevent、singlestratumhyperbolaev

8、entonlycontainlinearnoise、singlestratumhyperbolaeventonlycontainsurfacewaveItsummarytheirdifferentusedscopeandconditionOnthebasisoftimeshiftingcorrelationmethod，Itdevelopandproposedanewmethodtoestimatesignal—to—noiserati

9、o，InthispaperwecallitchangedtimeshiftingcorrelationmethodItfirstdistinguishcorrelatednoise，thenestimatetheenergyofsignalbytimeshiftingcorrelation，lastestimatesignal—to—noiseratioForthemethodtoestimatesignal—to—noiseratio

10、inthispaper，thepaperprovidethetheoryfoundationandrealizationstep，Manykindsoftheoreticdatamodelsdesignedandrealseismicdataareusedtoverifyitsusabilitychangedtimeshiftingcorrelationmethodhavestrongerusability、morewidelyrang

11、esandmorerealresultthanotherestimatebettermethodsatthepresenttime，inadditionthisPaDerdiscussitseffectfactorsuchasapparent—velocitydifference、theenergyofsignal、theenergyofcorrelatednoiseandSOon，toallowforOuruseanddevelopi