联合应用初至和浅层反射的二维可形变层析静校正
|
摘要
本文提出了一种联合应用初至和浅层反射时间的可形变层析方法(以下称联合可形变层析反演方法),用于地震资料的静校正量计算。理论模型数据测试显示,与其他方法相比,该方法比初至可形变层析方法、网格层析方法求出的速度界面的精度更高;实际地震数据测试表明,与其他方法相比,联合可形变层析法反演可以获得更合理的近地表速度模型,据此进行静校正处理获得的叠加剖面的反射同相轴的连续性明显优于初至可形变层析方法以及其他两种商业软件。
We have developed a deformable-layer tomography method with the joint use of first breaks and shallow reflections (Joint DLT) to calculate static corrections. The method is tested with a synthetic model and a field dataset from Tarim Basin,Western China. The synthetic test shows that our joint DLT method can provide velocity interface geometries with high resolution. The field test result indicates that the method can yield a geologically reasonable near-surface velocity model,and an improved stack section in comparison with the sections from the DLT (using only first breaks) as well as two other kinds of commercial tomostatics software.
We have developed a deformable-layer tomography method with the joint use of first breaks and shallow reflections (Joint DLT) to calculate static corrections. The method is tested with a synthetic model and a field dataset from Tarim Basin,Western China. The synthetic test shows that our joint DLT method can provide velocity interface geometries with high resolution. The field test result indicates that the method can yield a geologically reasonable near-surface velocity model,and an improved stack section in comparison with the sections from the DLT (using only first breaks) as well as two other kinds of commercial tomostatics software.
引文
[1]Li Pei ming,Zhou H,Yan Z,He Y.Deformable layer to-mostatics:2Dexamples in western China.The Leading Edge,2009,28(2):260～264
[2]Zhou H,Li Pei ming,Yan Z and Liu H.Constrained deformable layer tomostatics.Geophysics,2009,74(6):WCB35～WCB46
[3]Bishop T N.et al.Tomographic determination of ve-locity and depth in laterally varying media.Geophys-ics,1985,50:903～923
[4]Farran Vand Madariaga R.Non-linear reflection tomo-graphy.Geophys J,1988,95:135～147
[5]Stork C.Reflection tomography for the post migrated domain.Geophysics,1992,57:680～692
[6]Stork C.Ray Trace Tomographic Velocity Analysisof Surface Seismic Reflection Data[PhD thesis].California Institute of Technology,Pasadena,CA,1988
[7]Scales J A.Docherty P.and Gersztenkorn A.Regu-larisation of nonlinear inverse problems:i maging the near-surface weathering layer.Inverse Problems,1990,6:115～131
[8]McCaughey M,and Singh S C.Si multaneous velocity and interface tomography of normal-incidence and wide-aperture seismic travelti me data.Geophys J Int,1997,31:87～99
[9]White DJ,Two-di mensional seismic refraction tomo-graphy.Geophys J,1989,97:223～245
[10]Lutter WJ,and Nowack R L.Inversion for crustal structure using reflections fromthe PASSCAL Oua-chita experi ment.J Geophys Res,1990,95:4633～4646
[11]Zelt C A,and Smith R B.Seismic travelti me inver-sion for2-D crustal velocity structure.Geophys.J Int,1992,108:16～34
[12]Stork C and Clayton R W.Analysis of the resolution between ambiguous velocity and reflector position for travelti me tomography.SEG Technical Program Expanded Abstracts,1986,5:545～550
[13]Li Pei ming,Yan Z,Guo Mand Zhou H.2-D deform-able-layer tomostatics with the joint use of first breaks and shallow reflections.SEG Technical Pro-gram Expanded Abstracts,2009,28:1335～1339
[14]Zhou H.Multiscale travelti me tomography.Geophys-ics,2003,68:1639～1649
[15]Zhou H.Multiscale deformable-layer tomography.Geophysics,2006,71:R11～R19
[16]Kosloff D.et al.Velocity and interface depth deter-mination by tomography of depth migrated gathers.Geophysics,1996,61:1511～1523
[17]Wang Y.Si multaneous inversion for model geometry and elastic parameters.Geophysics,1999,64:182～190
[2]Zhou H,Li Pei ming,Yan Z and Liu H.Constrained deformable layer tomostatics.Geophysics,2009,74(6):WCB35～WCB46
[3]Bishop T N.et al.Tomographic determination of ve-locity and depth in laterally varying media.Geophys-ics,1985,50:903～923
[4]Farran Vand Madariaga R.Non-linear reflection tomo-graphy.Geophys J,1988,95:135～147
[5]Stork C.Reflection tomography for the post migrated domain.Geophysics,1992,57:680～692
[6]Stork C.Ray Trace Tomographic Velocity Analysisof Surface Seismic Reflection Data[PhD thesis].California Institute of Technology,Pasadena,CA,1988
[7]Scales J A.Docherty P.and Gersztenkorn A.Regu-larisation of nonlinear inverse problems:i maging the near-surface weathering layer.Inverse Problems,1990,6:115～131
[8]McCaughey M,and Singh S C.Si multaneous velocity and interface tomography of normal-incidence and wide-aperture seismic travelti me data.Geophys J Int,1997,31:87～99
[9]White DJ,Two-di mensional seismic refraction tomo-graphy.Geophys J,1989,97:223～245
[10]Lutter WJ,and Nowack R L.Inversion for crustal structure using reflections fromthe PASSCAL Oua-chita experi ment.J Geophys Res,1990,95:4633～4646
[11]Zelt C A,and Smith R B.Seismic travelti me inver-sion for2-D crustal velocity structure.Geophys.J Int,1992,108:16～34
[12]Stork C and Clayton R W.Analysis of the resolution between ambiguous velocity and reflector position for travelti me tomography.SEG Technical Program Expanded Abstracts,1986,5:545～550
[13]Li Pei ming,Yan Z,Guo Mand Zhou H.2-D deform-able-layer tomostatics with the joint use of first breaks and shallow reflections.SEG Technical Pro-gram Expanded Abstracts,2009,28:1335～1339
[14]Zhou H.Multiscale travelti me tomography.Geophys-ics,2003,68:1639～1649
[15]Zhou H.Multiscale deformable-layer tomography.Geophysics,2006,71:R11～R19
[16]Kosloff D.et al.Velocity and interface depth deter-mination by tomography of depth migrated gathers.Geophysics,1996,61:1511～1523
[17]Wang Y.Si multaneous inversion for model geometry and elastic parameters.Geophysics,1999,64:182～190
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心