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tti介质逆时偏移成像

Keywords: 逆时偏移,tti介质,声波近似假设,有限差分

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Abstract:

?本文基于alkhalifah的p-sv波频散关系,应用声波近似假设推导了横向各向同性介质(ti)中的声波标量方程组,其中每个方程都含有与时间和空间有关的二阶导数项,并且方程中不含有混合导数项,易于利用有限差分法进行数值模拟。文中采用改进的不完全声波近似假设,从而获得了更长的稳定模拟时间,与采用传统声波近似假设相比,波场传播更加稳定。有限差分数值模拟及复杂模型数据的计算结果表明,ti介质中的声波标量方程组能准确地描述准声波在ti介质中的运动学特征,能很好地进行逆时偏移成像。

References

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[3]  ghouh,zhanguandbloorr.ananisotropicacousticwaveequationforvtimedia.abstractsof68thsagemtk,2006,h033.
[4]  hcstholms.acousticvtimodelingusinghigh-orderfinite-differences.segtechnicalprogramexpand-edabstracts,2007,26:139-143.
[5]  dux,fletcherrandfowlerpj.anewpscudo-acousticwaveequationforv"timedia.abstractsof70thsagemtg,2008,h033.
[6]  duvcnccke,milcikp,bakkcrpmandpcrkinsc.acousticv"i}lwaveequationsandtheirapplicationforamsotropgcreverse-timemigration.
[7]  egtechnicalprogramexpandedabstracts,2008,27:2186-2190.
[8]  ghouh,zhanguandbloorr.ananisotropicacous-ticwaveequationformodelingandmigrationin2d(timedia).segtechnicalprogramexpandedab-stracts,2006,2:194-198.
[9]  flctchcrr,duxandfowlerpj.anewpseudo-a-cousticwaveequationfor"timedia.segtechnicalprogramexpandedabstracts,2008,27:2082-2086.
[10]  flctchcrr,duxandfowlerpj.reversetimemi-grationintimedia.geophysics,2009,74(6):wca179-wca187.
[11]  zhanghandzhangy.reversetimemigrationin3dheterogeneousigmedia.segtechnicalprogramexpandedabstracts,2008,27:2196-2200.br
[12]  zhangyandzhangh.astabletireversetimemigrationanditsimplementation.segtechnicalprogramexpandedabstracts,2009,28;279-2798.
[13]  claerboutjf.tmagingtheearthsnterior.black-wellscientificpublicationslnc,19885.
[14]  duvenecke,bakkerpm.stablep-wavemodelingforreversetimemigrationintiltedtimedia.geophyszcs,2011,76(2):s65-s75.

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