Lithologic Reservoirs ›› 2007, Vol. 19 ›› Issue (1): 86-91.doi: 10.3969/j.issn.1673-8926.2007.01.016

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3D frequency and space domain amplitude-preserved migration with viscoelastic wave equations

YANG Wuyang1 , YANG Wencai2 , LIU Quanxin1 , WANG Xiwen1   

  1. 1. Northwest Branch , Research Institute of Petroleum Exploration and Development , PetroChina;
    2. Institute of Geology , Chinese Academy of Geological Sciences
  • Online:2007-03-15 Published:2007-03-15

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Abstract:

The paper studied a new algorithm of 3D frequency and space domain amplitude-preserved migration with viscoelastic wave equations.This code gives an alternative method which compensates Q and transmission losses in the seismic data during scalar finite-difference migration.The geometrical spreading, Q and transmission losses and dispersion are compensated simultaneously as part of the migration.Firstly,starting from the viscoelastic wave equation, high-order finite-difference format of amplitude-preserved migration operator viscoelastic was derived.Secondly,the imaging condition was modified in order to include a ttenuation effecting in seismic propagating wavefield.Then,3D migration was realized by using a 3D one-way depth stepping extrapolation.Good processed results of synthetic data proved that algorithm is stable,reliable and widely applicable.

Key words: controlled illumination, focusing point, inverse focusing operator, prestack depth migration

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