一种PS波与PP波反射时间匹配方法
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摘要
多波多分量地震资料解释中,反射纵波与转换横波反射时间关系是影响地震储层预测的关键因素之一。该文在前人研究工作基础上,提出了利用转换波叠前道集进行纵横波速度比提取及纵波与转换横波反射时间匹配处理方法。模型资料计算结果表明,文中所述方法可以直接由转换波道集计算得到横波速度、纵横波速度比等参数,应用这些参数可实现纵波与转换波反射时间匹配处理。该方法具有一定的计算精度,特别适合于水平层状地层多波多分量资料处理。
PS to PP time mapping is one of key factors affecting seismic reservoir predictions in multicomponent seismic interpretations.Based on prior work,a new method is presented for the ratio of compressional velocity and shear velocity scanning and PS to PP reflection time mapping with using converted-wave prestack data.Model data results show that converted-wave velocity,the ratio of compressional velocity and shear velocity can be obtained directly from converted-wave seismic gathers,and P wave and PS wave reflection time can be automatically matched by means of the method presented.It works well with model data,suits for multicomponent seismic data processing in an area with horizontal formation.
PS to PP time mapping is one of key factors affecting seismic reservoir predictions in multicomponent seismic interpretations.Based on prior work,a new method is presented for the ratio of compressional velocity and shear velocity scanning and PS to PP reflection time mapping with using converted-wave prestack data.Model data results show that converted-wave velocity,the ratio of compressional velocity and shear velocity can be obtained directly from converted-wave seismic gathers,and P wave and PS wave reflection time can be automatically matched by means of the method presented.It works well with model data,suits for multicomponent seismic data processing in an area with horizontal formation.
引文
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[4]TIM J,RISHI B,ALEX M,et al.Joint PP-PS angle-stack analysis and AVA inversion in Grane Field,offshoreNorway[J].The Leading Edge,2010,29(10):1228-1239.
[5]IGOR B M.Exact elastic P/SV impedance[J]Geophys-ics,2010,75(2):C7-C13.
[6]CHAU A,EDEL K.Structural interpretation using PSseismic on the Kvitebjorn Field in the North Sea[J].TheLeading Edge,2010,29(4):402-407.
[7]魏修成,陈雨红,刘洋.垂向非均匀介质中的地震波旅行时近似[J].石油地球物理勘探,2007,42(2):149-155.
[8]TSVANKIN I,THOMSEN L.Nonhyperbolic reflectionmoveout in anisotropic media[J].Geophysics,1994,59(8):1290-1304.
[9]THOMSEN L.Converted-wave reflection seismology overinhomogeneous,anisotropic media[J].Geophysics,1999,64(3):678-690.
[10]PAWAN D,ILYA T,MIKE B,et al.PS-wave moveoutinversion for tilted TI media,A physical-modeling study[J].Geophysics,2006,71(4):D135-D143.
[11]AKI K I,RICHADS P G.Quantitative seismology[M].Cambr idge:W H Freeman and Co,Cambridge Press,1980.
[12]TESSMER G,BEHLE A.Common reflection point data-stacking technique for converted waves[J].GeophysicalProspecting,1988,36(7):671-688.
[13]YILMAZ O.Seismic data analysis:processing,inversion,and interpretation of seismic data[M].SEG Pub-lications Press,2001.
[2]CHEN M,ZHAN S,WAN Z,et al.Joint poststack P-and PS-wave impedance inversion and an example fromnorthern China[J].The Leading Edge,2009,28(3):332-338.
[3]HELENE H V,MARTIN L.Simultaneous inversion ofPP and PS seismic data[J].Geophysics,2006,71(3):R1-R10.
[4]TIM J,RISHI B,ALEX M,et al.Joint PP-PS angle-stack analysis and AVA inversion in Grane Field,offshoreNorway[J].The Leading Edge,2010,29(10):1228-1239.
[5]IGOR B M.Exact elastic P/SV impedance[J]Geophys-ics,2010,75(2):C7-C13.
[6]CHAU A,EDEL K.Structural interpretation using PSseismic on the Kvitebjorn Field in the North Sea[J].TheLeading Edge,2010,29(4):402-407.
[7]魏修成,陈雨红,刘洋.垂向非均匀介质中的地震波旅行时近似[J].石油地球物理勘探,2007,42(2):149-155.
[8]TSVANKIN I,THOMSEN L.Nonhyperbolic reflectionmoveout in anisotropic media[J].Geophysics,1994,59(8):1290-1304.
[9]THOMSEN L.Converted-wave reflection seismology overinhomogeneous,anisotropic media[J].Geophysics,1999,64(3):678-690.
[10]PAWAN D,ILYA T,MIKE B,et al.PS-wave moveoutinversion for tilted TI media,A physical-modeling study[J].Geophysics,2006,71(4):D135-D143.
[11]AKI K I,RICHADS P G.Quantitative seismology[M].Cambr idge:W H Freeman and Co,Cambridge Press,1980.
[12]TESSMER G,BEHLE A.Common reflection point data-stacking technique for converted waves[J].GeophysicalProspecting,1988,36(7):671-688.
[13]YILMAZ O.Seismic data analysis:processing,inversion,and interpretation of seismic data[M].SEG Pub-lications Press,2001.
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