基于频率搬移的地震资料约束测井资料外推
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摘要
由于地震资料本身频带有限的特性 ,导致在利用地震资料作为约束条件进行测井资料外推时存在奇异性 .文中利用通信中常用的频率搬移技术 ,将频带有限的地震资料转化成一种频带拓宽的伪超分辨率资料来控制测井资料的外推 ,从而解决地震资料约束下的测井资料外推技术中的奇异性问题 .并利用同相轴自动追踪和时频分析技术 ,解决子波时变的问题 ,实现沿地层自适应地外推测井资料 .对实际资料的测井速度和反射系数外推结果表明 ,此法具有较好的应用前景 .
Since seismic data are band-limited, it leads to singularity of extrapolation of well-log data when using seismic data. To overcome the singularity, a novel technique based on frequency-shift, which is popular in communication, is proposed in this paper to extend the bandwidth of seismic data. It transforms the band-limited seismic data into pseudo-supper-resolution data by frequency-shift to control the extrapolation of well-log data. To be seasoned with time-variable wavelet, automatic seismic event tracking and time-frequency techniques are applied to extrapolate well-log data along the stratum adaptively. The results of the extrapolation of velocity and reflectivity show a good perspect of application.
Since seismic data are band-limited, it leads to singularity of extrapolation of well-log data when using seismic data. To overcome the singularity, a novel technique based on frequency-shift, which is popular in communication, is proposed in this paper to extend the bandwidth of seismic data. It transforms the band-limited seismic data into pseudo-supper-resolution data by frequency-shift to control the extrapolation of well-log data. To be seasoned with time-variable wavelet, automatic seismic event tracking and time-frequency techniques are applied to extrapolate well-log data along the stratum adaptively. The results of the extrapolation of velocity and reflectivity show a good perspect of application.
引文
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[2] 王嘉松,曹桂荣.分形脉冲反褶积方法.地球物理学报,1998,41(1):99～108WangJS ,ChaoGR .Themethodoffractalpulsedeconvolution.ChineseJ .Geophys.(inChinese),1998,41(1):99～108
[3] 陆文凯,李衍达,牟永光.误差反传播神经网络法地震反演.地球物理学报,1996,39(Suppl):292～301LuWK ,LiYD ,MuYG .Seismicinversionusingerror back prop agationneuralnetwork.ChineseJ .Geophys.(inChinese),1996,39(Suppl.):292～301
[4] HampsonD ,SchuelkeJS ,QuireinJA .Useofmultiattributetrans formstopredictlogpropertiesfromseismicdata.Geophysics,2001,66(1):220～236
[5] LIUZ ,LIUJ.Seismic controllednonlinearextrapolationofwellpa rametersusingneuralnetworks.Geophysics,1998,63(6):2035～2041
[6] 姚逢昌,甘利灯.地震反演的应用和限制.石油勘探与开发,2000,27(2):53～56YaoFC ,GanLD .Applicationandlimitationofseismicinversion.PetroleumExplorationandDevelopment(inChinese),2000,27(2):53～56
[7] 彭传圣,常国贞.试论地震约束反演的不适定性.油气地质与采收率,2002,9(2):88～90YaoCS ,ChangGZ .Ontheindeterminacyofseismicconstrainedinversion.PetroleumGeologyandRecoveryEfficiency(inChinese),2002,9(2):88～90
[8] 肖 阳,朱 敏,朱文奎等.测井约束反演技术在油藏描述中的应用.石油地球物理勘探,2001,36(5):633～639XiaoY ,ZhuM ,ZhuWK ,etal.Applicationofwell logconstrainedinversiontechniqueinreservoirdescription.PetroleumGeophysicalProspecting(inChinese),2001,36(5):633～639
[9] 林小竹,钱绍新.波阻抗映射法外推.地球物理学报,1998,41(1):109～116LinXZ ,QianSX .Impedancemappingextrapolation.ChineseJ .Geophys.(inChinese),1998,41(1):109～116
[10] 何樵登,梁光河.利用地震资料和测井约束反演地层参数———一种测井数据的地震外推方法.石油物探,1995,34(2):1～7HeQD ,LiangGH .Formationparametersinversionviaseismicandwell logdata:aseismicextrapolationforwell logdata.GeophysicalProspectingforPetroleum(inChinese),1995,34(2):1～7
[11] 曹志刚,钱亚生.现代通信原理.北京:清华大学出版社,1999CaoZG ,QianYS .PrinciplesofModernCommunication(inChi nese).Beijing:TsinghuaUniversityPress,1999
[12] 郑君里,杨行峻.人工神经网络.北京:高等教育出版社,1992ZhenJL ,YangXJ.ArtificialNeuralNetwork(inChinese).Bei jing:AdvancedEducationPress,1992
[13] 罗 晖.提高过井地震剖面分辨率的理论和应用研究[博士论文].北京:清华大学,1994LuoH .Studyonthetheoryandapplicationofenhancingtheresolu tionofwell logseismicprofile[Doctor’sdissertation].Beijing:Ts inghuaUniversity,1994
[14] 陆文凯,牟永光.用自组织神经网络实现地震同相轴自动追踪.石油物探,1998,37(1):77～83LuWK ,MuYG .Automaticseismiceventtracingusingself orga nizedneuralnetwork.GeophysicalProspectingforPetroleum(inChi nese),1998,37(1):77～83
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