预测反褶积去多次波几个理论问题探讨

31120091:2008-07-08:2008-09-02:10011749(2009)010006051,1,1,1,2,2(1.,257061;2.,257022):,,:,,;,;,;,,,;,50m,,,:;;;;:P63114:A01969,PeacockTreitel[1],,,[23],,,,[47]SRME[811],,,,,,[1214],?,?,()??,,,,,,,11.1,,,l,x(t+l)==0b()(t+l-)=l-1=0b()(t+l-)+=lb()(t+l-)I(1),e(t+l)=x(t+l)-^x(t+l)(2),(1)^x(t+l)(),e(t+l)(),,b(t)=(b(0),b(1),,b(l-1))(3)1.2,c(t)=(c(0),c(1),,c(m)),,(1+)rxx(0)rxx(1)rxx(m)rxx(1)(1+)rxx(0)rxx(m-1)wrxx(m)rxx(m-1)(1+)rxx(0)c(0)c(1)c(m)=rxx(l)rxx(l+1)rxx(l+m)(4)rxx;,,(2)22.1(1),014,100m,1532m/s,35Hz,2ms1Fig.1Geologicmodelofsurfacerelatedmultiples2(a),(l=130ms),:,,(2(d))2(b)2(c)130ms70ms,,1%,400ms130ms,,,;70ms,70ms,,2(a),2(d),24,2Fig.2Experimentswithdifferentpredictivesteplengths71:70ms,2.22(a),,3(b)3(d),3(b)160ms,,,,;3(c)=,,;3(d)16ms,,,,35Hz50ms,,,;3(e)=2ms,,3(d),,:2.31,70ms,4(c)200ms,4(b)400ms,,;,(4),rxx(0)rxx(1)rxx(m)3Fig.3Singlesteppredictiondeconvolutiontest4Fig.4Operatorlengthtest8315Fig.5Cascadepredictivedeconvolutiontest,,2.4,,;,,,,?5(a),,150ms,260ms5(b)5(c),5(d)5(e),,,(1)(4),,,,,,[1516]2.5,,?,,,6Fig.6Geologicmodelwithpeg-legmultiples(6),,,,,01485-01412,,,4500m/s,,,01082,-01016(-01412),7(a)7(b)7(c)200m100m50m7:,91:,,7(b);,7(c),50m,,,,,7Fig.7Thedirectcognitionofpeg-legmultiples3(1),,,,(2),,,,,,(3),,,,,(4),,;,,,(5),50m,,:[1]PEACOCKKL,TREITELS.Predictivedeconvolution-Theoryandpractices[J].Geophysics,1969,34(2):155.[2]..[M].,,.:,1993.[3],.[M].:,2004.[4]FOSTERJ,MOSHERC.Suppressionofmultiplereflec2tionsusingtheRadontransform[J].Geophysics.1992,57:386.[5],,.MATLAB[J],,2000,22(4):346.[6],,,.Radon[J],,2002,37(2):110.[7],,,.[J],,2004,39(4):398.[8].[D].,(),2004:4.[9],,,.-[J].,2005,48(1):173.[10],,,.[J].,2002,9(2):511.[11].[J].,2006,20(4):68.[12],,.[J].,2007,46(5):457.[13].[J].,2007,29():116.[14],,,.[J].,2004,26(4):365.[15],.[J].(),2003,17(1):74.[16]LANCASTERS.Targeteddeconvolutionforoptimalmultipleattenuation[C].SEG/HoustonAnnualMeet2ing,2005:2091.:(1965-),,,,,0131Vol.31No.1COMPUTINGTECHNIQUESFORGEOPHYSICALANDGEOCHEMICALEXPLORATIONJan.2009ABSTRACTS3-DSEISMICIDENTIFICATIONOFORGAN2ICREEFANDOOLITICSHOALRESERVOIRSINCHANGXING-FEIXIANGUANFORMA2TIONINNORTHEASTSICHUANBASINHEZhen2hua1,PUYong2,XIONGXiao2jun1,etal.(1.ChengduUniversityofTechnology,Chengdu610059,China;2.SouthernBranchofSinopecEx2plorationCorp,Chengdu610041,China).COMPUT2INGTECHNIQUESFORGEOPHYSICALANDGEO2CHEMICALEXPLORATION,2009,31(1):1InordertoimprovetheseismicidentificationandpredictionofdeepreefandshoalreservoirsinChan2gxing-Feixianguanformationstrata,North-EastSi2chuanBasin,Somemeaningfulandefficientapproa2chesorstepsareproposedinthispaper.Thefirstoneistheidentificationoforganicreefandreef2ooliticshoalcomplexreservoirsonseismicrecordsbyusingtheseismicresponsecharacterizationsfromseismicsimulationandrealdataanalysis.Thesecondistheaccurate3Dimagesofreef2shoalcomplexreservoirshapebasedonGRCTMmethodwhichmeansusingtheglobalvariationruleofreefcomplexdepositionformationandevolutiontocontrolorconstrainthelo2caltracingandmappingofseismicreflectionsfromthecomplexstrata.Thethirdisthereservoirpredictionbyintegratedanalysisofgeology,welllogs,seismicdataandwaveform2basedseismicfaciesanalysis.Keywords:Changxing2Feixianguanformation;iden2tificationofreefandooliticshoalreservoirs;seismic3Dimage;seismicfaciesanalysisDISCUSSIONOFSEVERALTHEORETICALQUESTIONSTOREMOVESEISMICMULTI2PLESUSINGPREDICTIVEDECONVOLUTIONZHANGJun2hua,MIAOYan2shu,ZHENGXu2gang,etal.(CollegeofGeo-ResourceandInformation,ChinaUniversityofPetroleum,Dongying257061,China).COMPUTINGTECHNIQUESFORGEO2PHYSICALANDGEOCHEMICALEXPLORATION,2009,31(1):6Thisarticledealswithpredictivedeconvolutiontoremoveseismicmultiplesbasedonnumericalmod2eling,anddiscussesseveraltheoreticalissuesinthisresearchwiththeconclusionsas:(1)Intracegath2er,themoveoutofmultipleischangeableandtore2movemultiplesinentiretracegather,theselectionofpredictivelengthmusttakefartracesintoaccount;(2)Predictivedeconvolutiontoremovemultipleisnotcompletelythesameasotherprocessingofenhan2cingresolution,anditisdifficulttoattenuatemultipleexactlyusingaveryshortpredictivelength;(3)Thelengthofpredictiveoperatormustlargerthantheperi2odofmultiple,becauseitmaybeincreasesfakeener2gyafterprocessing;(4)Theresultaboutthecascadeofpredictivedeconvolutionisfarfromtheperfection,sothatitmustbeusedcarefullyanditisalsosugges2tedtouselongpredictivelengthfirstifitisnecessa2ry;(5)Peglegmultipleinlayersareattenuatedveryquickly,anditisimpossibletoremovethosemultiplethattheintervalthicknessbetweenlayersislessthan50m,andsomeothermethodsareinneedtoremovethemultiplesinhighprecision.Keywords:multiple;predictivedeconvolution;cas2cadeofpredictivedeconvolution;predictivelength;operatorlengthDENSITYANOMALYINDICATORANDITSAPPLICATIONWITHWELLLOGGINGDATALIUWei,CAOSi2yuan(KeyLabofGeophysicalEx2plorationunderCNPC,ChinaUniversityofPetrole2um,Beijing102249,China).COMPUTINGTECH2NIQUESFORGEOPHYSICALANDGEOCHEMICALEXPLORATION,2009,31(1):11DensityanomalyindicatorisderivedbasedonGardner’svelocity-densityrelationanddensityanom2aliesrelatetothehydrocarbonsaturationormineralcompositionofrocks.Thepaperstud