无射线追踪法层析静校正及其应用
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摘要
在分析了射线追踪法层析静校正优缺点的基础上,认为射线追踪法层析静校正存在静校正量的低频分量跟实际具有不符的现象。无射线追踪法层析静校正将首波方法的稳定性和回转波方法的灵活性结合起来,不使用显式射线追踪法进行层析,不依赖于显式的模型网格化,在实际资料的处理中,能得到一个稳定的静校正量,从而保证了地层形态的准确性,同时对无射线追踪层析反演的步骤、主要参数以及参数的质量控制进行了详细的分析。将该方法应用于新疆塔里木盆地沙雅隆起天山南区块库车东三维地震资料处理中,取得了很好的效果。
Based on analyzing the merits and shortcomings of ray-tracing tomographic static correction and combining actual seismic data,we can find the phenomenon that the low-frequency component is different from the truth.The static correction without ray-tracing method is combined with the first wave's stability and the flexibility of rotary-wave.It applies the refractional wave's geometric properties,and exports the velocity models.The method doesn't depend on explicit model grids.It can obtain stable static correction and guarantee the accuracy of the formation shape.Meanwhile we have carried on the detailed analysis on the result of the step,the main parameter as well as the parameter quality control of the method without ray tracing.Using this method in the East of KuChe in 3-D seismic data processing,which is located in the uplift Tarim Basin in Xinjiang Tianshan block,we gained satisfied results.
Based on analyzing the merits and shortcomings of ray-tracing tomographic static correction and combining actual seismic data,we can find the phenomenon that the low-frequency component is different from the truth.The static correction without ray-tracing method is combined with the first wave's stability and the flexibility of rotary-wave.It applies the refractional wave's geometric properties,and exports the velocity models.The method doesn't depend on explicit model grids.It can obtain stable static correction and guarantee the accuracy of the formation shape.Meanwhile we have carried on the detailed analysis on the result of the step,the main parameter as well as the parameter quality control of the method without ray tracing.Using this method in the East of KuChe in 3-D seismic data processing,which is located in the uplift Tarim Basin in Xinjiang Tianshan block,we gained satisfied results.
引文
[1]成谷,马在田.地震层析成像中存在的主要问题及应对策略[J].地球物理学进展,2003(3):512~518.
[2]Zhang J,Toksoz M N.Nonlinear refraction travel-time tomography[J].Geophysics,1998,63(5):1726~1737.
[3]Osypov K.Robust refraction tomography[C].Ex-panded Abstract of 70th Annual Internet SEG Mtg,2000.2032~2035.
[4]Van der Sluis,Van der Vorst.SIRT-and CG-type methods for the iterative solutions of sparse lin-ear least-squares problems[J],Linear Algebra Ap-ply,1990,130:257~302.
[5]Ryzhikov.3-D nonlinear inversion by entropy of im-age contrast optimization[R].Nonlinear Processes inGeophysics,1995.228~240.
[6]冯泽元,李培明.利用层析反演技术解决山地复杂区静校正问题[J],石油物探,2005(3):284~286.
[7]陈进,闫立志.鄂尔多斯盆地折射静校正方法应用[J],工程地球物理学报,2006,3(5):337~342.
[2]Zhang J,Toksoz M N.Nonlinear refraction travel-time tomography[J].Geophysics,1998,63(5):1726~1737.
[3]Osypov K.Robust refraction tomography[C].Ex-panded Abstract of 70th Annual Internet SEG Mtg,2000.2032~2035.
[4]Van der Sluis,Van der Vorst.SIRT-and CG-type methods for the iterative solutions of sparse lin-ear least-squares problems[J],Linear Algebra Ap-ply,1990,130:257~302.
[5]Ryzhikov.3-D nonlinear inversion by entropy of im-age contrast optimization[R].Nonlinear Processes inGeophysics,1995.228~240.
[6]冯泽元,李培明.利用层析反演技术解决山地复杂区静校正问题[J],石油物探,2005(3):284~286.
[7]陈进,闫立志.鄂尔多斯盆地折射静校正方法应用[J],工程地球物理学报,2006,3(5):337~342.
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