宽方位地震资料处理技术及应用效果-张保庆

20116463*,300280Email:[e-mail]2010528,2011223##:1000-7210(2011)03-0396-05宽方位地震资料处理技术及应用效果张保庆*¹º周辉¹左黄金º王者武º贺兆全º曾天玖º秦伯东º(¹;CNPC,(),102249;º,300280),,,,,,..,2011,46(3):396~400,406随着方位角的增大,宽方位地震资料的速度随方位角的变化与倾角和方位相关的旅行时差与方位相关的各向异性等问题也随之产生当所采集的宽方位资料不是全方位时,如何根据资料的实际情况形成有利于后续处理和解释的分方位道集尤为重要本文针对这些问题提出了相应的解决办法,包括运用分方位道集技术形成合理的方位道集;运用分方位速度分析技术精确求取叠加速度;运用与倾角方位角相关的旅行时校正技术进行倾角方位角的旅行时校正;运用分方位各向异性偏移技术消除不同方位的各向异性影响等对实际资料的处理效果表明,本文所述方法是切实可行的宽方位方位道集方位速度分析倾角方位角旅行时校正方位各向异性:P631:A1引言,()()0.5,()()0.5,[1][2~4]:,;(AVOA)(VVA),;;,,,,,,,,,2宽方位地震资料处理技术2.1,,(VVA),(AVOA),,,,463:3971,,,,(1),,/0,,(2),,[5](3),,245b,(3982011);2,2.2vstkvstk=vrmscos=vrms1-sin2cos2A(1):;;A;vrms,(1),,,,/,,,;,,330b3000m/s,,,400m/s3()[6],,,,,4a~4d,4e,44(a)~(d)(e)2.3,CMP,(5)530b,3000m/s,10bCMP,,463:3995,[3]$t=(t0+$t2)2+x2V2rms-$t2112-t20+x2V2rms12(2):$t;$t1;$t2;x;Vrms;t0$t1$t2$t1=(Xs-Xr)$dtx+(Ys-Yr)$dty2(3)$t2=(Xc-Xm)$dtx+(Yc-Ym)$dty(4):Xs,Ys;Xr,Yr;Xc,Yc;Xm,Ym;$dtx$dtyInlineCrossline(ms/m):(6);,;,(7)40020112.4,,(8)V=xmaxdtndtn+2S0)t0S0(5)G=18t0S0-1(6):V;G;xmax8;t0;dtnS0[7],,3应用实例208256,200m,200m,25m,25m,16()@10(),0.625KN,,,,(9)9,9()()(下转第406页)406201115(1):55~61ShaZh-ibin,YangMu-zhuang,LiangJin-qing.ThesignatureoftheBSRWaveletandApplicationoftheDistinguishableforMarineGasHydrants.GeologicalResearchofSouthChinaSea,2003,15(1):55~61[14]ShipeyTH,Houston,BullerRTetal.Seismicev-idenceforwide-spreadpossiblegashydrateshorizonsoncontinentalslopesandrises.AAPGBulletin,1979,63(12):2204~2213[15]LeeMW,HutchinsonD,AgenaWFetal.SeismiccharacterofgashydratesontheSoutheasternUScon-tinentalmargin.MarineGeophysicalResearches,1994,16(3):163~184[16],,..,2006,22(3):1~6ChenQiang,LiangGuang,JinHua-fengetal.Ana-lysisofseismicvelocityinthemiddleoftheSouthCh-inaSea.MarineGeologyLetters,2006,22(3):1~6[17],,..:,2000[18]..,1993,28(4):403~410LinXiao-zhu.Covariancevelocityspectrum.OGP,1993,28(4):403~410[19],,..,2006,20(4):605~612Zhangguang-xue,ZhuYou-hai,LiangJin-qiangetal.TectoniccontrolsongashydratedepositsandTheircharacteristics.Geoscience,2006,20(4):605~612[20],,..,2008,22(3):356~361WuNeng-you,LiangJin-qiang,WangHong-binetal.Marinegashydratesystem:stateoftheart.Geo-science,2008,22(3):356~361[21],..,2008,28(4):94~100YaoBo-chu,YangMu-zhuang.TectonicmovementsintheLateCenozoicandgashydrateresourcesintheSouthChinaSea.MarineGeologyandQuaternaryGeology,2008,28(4):94~100(本文编辑:金文昱)(上接第400页)4结论与认识,:(1),;(2),,DMO;(3),;(4),;(5),[1]..,2007,42(5):603~609ZhangJun-huaetal.Summaryofwide-azimuthseismicexplorationtechnique.OGP,2007,42(5):603~609[2]CordsenA.Narrowversuswideazimuthland3Dseis-micsurveys.TheLeadingEage,2002,21(8):764~770[3],..,2005,17(2):39~44HuZ-iduo,Liuquan-xinetal.Discussiononwideaz-imuthseismicdataprocessingmethods.NorthwestOil&GasExploration,2005,17(2):39~44[4],./.,2005,40(3):305~308LingYun,GaoJunetal.Analysisandappreciationofwide/narrowazimuthexplorationcases.OGP,2005,40(3):305~308[5]..2010,2010[6],..,1994,29(4):483~489XuChang-lianandZhangHong-ying.Determinationofthree-parametervelocityinformationsandtheapplica-tion.OGP,1994,29(4):483~489[7]..,2008,28(1):1~5XuCu-ieetal.Applicationofhighdensitybispectralanalyzingmethodtovelocityanalysisinanisotropymedia.OffshoreOil,2008,28(1):1~5(本文编辑:金文昱)20116463作者介绍,1983;2004,2007,2010;,1985;2008,20113,,1970;1992(),1998();;,(),1964;1986;;;,1970;1993;;;(),1973;1997(),2008();;,1974;1997,20002003;,1969;1991,1996();,1969;1991,1997;;;,1973;1997(),2008;,(),1966;1988,1988~2000,,2001,;(),,1979;2002,20052008;,20;,1981;2004,2007();,,1982;2006(),2007~2009(UniversityofTexasatAustin);,,1983;2006(),2009;,,1983;2006,2009();,,,1976;2002,20062009;,1983;2004,2008;10(5EISCI),4;,1982;2004,2009;,,1971;2004();,1980;2003;,1957;1982;;,,1983;2005,2008;,,1979;2002,2005;,,1985;2007,2010();(),,1964;19841987,2004;();,1982;2005,2008,20116;,1964;1981,2005();;ÔOilGeophysicalProspecting20111.OceanUniversityofChina,Qingdao,Shandong266100,China2.GRI,BGPInc.,CNPC,Zhuozhou,Hebei072751,China3.DagangBranchofGRI,BGPInc.,CNPC,Tian-jin300280,ChinaWideazimuthdataprocessingtechniquesandtheirapplications.ZhangBao-qing1,2,ZhouHui1,ZuoHuang-jin2,WangZhe-wu2,HeZhao-quan2,ZengTian-jiu2andQinBo-dong2.OGP,2011,46(3):396~400,406Wideazimuthdataacquisitionleadsafewproblemsindataprocessing,suchasvelocityvaria-tionwithazimuth,azimuth-dependencetraveltimecorrection,azimuth-dependenceanisotropy.Forwideazimuthdata(notfullazimuthdata),itisver-ycrucialtoformreasonableazimuthsectorswhicharefavorableforprocessingandinterpretationfromrealdata.Inthispaperweproposeasetofsolutionsincludingazimuthsectorforming,az-imuthaccuratestackvelocityestimation;azimuth-dependencetraveltimecorrectionandazimuthan-isotropicpre-stackmigration.Improvedresultshavebeenachievedwithapplicationsofthesetech-niques,andshowthatourapproachesarefeasible.Keywords:wideazimuth,azimuthsector,azimuthvelocityanalysis,dip-azimuth-dependencetraveltimecorrection,azimuthanisotropy1.StateKeyLaboratoryofEarthResourcesandProspecting;CNPCKeyLaboratoryofGeophysics,ChinaUniversityofPetroleum(Beijing),Beijing102249,China2.DagangBranchofGRI,BGPInc