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叠前共炮点道集的奇性反演研究 被引量:2

THE SINGULARITY INVERSION FOR THE UNSTACKED COMMON-SOURCE GATHER
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摘要 讨论了地震波场的Fourier积分算子奇性反演理论与方法,得出常数背景假设条件下二维共炮点道集奇性反演的解析表达式.构造了两个理论地震模型,分别进行二维有限差分正演与奇性反演的数值计算将二维Fourier积分算子奇性反演方法用于野外的二维地震勘探叠前共炮点记录.在勘探范围内,当介质波速变化相对背景波速符合小扰动假设时。 In this paper, we discuss the theory and method of the singularity inversion for seismic wavefield data with the Fourier integral operator, and obtain an analytic expression of the singularity inversion for the 2-D unstacked common-source gather in constant background velocity. We establish two theoretical seismic models and respectively implement 2-Dfinite-difference modeling and singularity inversion to them. For the first time, we use 2-Dsingularity inversion method to raw field unstacked common-source gather data. Computing results, both for the theoretical modals and for the raw field data, show that the effects of singuldrity inversion are satisfactory for the regions where the variations of medium velocity conform to the assumption of small perturbation in comparison with the background velocity.
出处 《地球物理学报》 SCIE EI CAS CSCD 北大核心 1998年第S1期326-336,共11页 Chinese Journal of Geophysics
关键词 叠前共炮点道集 Fodrier积分算子 奇性反演 反散射 扰动技术 Unstacked common-source gather, Fourier integral operator, Singularity inversion, Inverse scattering, Perturbation technique.
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参考文献2

  • 1栾文贵.地球构造反演问题的新途径[J]地球物理学报,1986(04). 被引量:1
  • 2仇庆久等编..傅里叶积分算子理论及其应用[M].北京:科学出版社,1985:240.

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