The seismic forward modeling using Born approximation equation based on rheological body
He Binghong
Wu Guochen
Abstract：The conventionalτmethod assumes that the stress relaxation time is approximately equal to the strain delay time,leading to the constant Q model with low precision.In this study,an improvedτmethod is proposed by an accu-rate equation of Q value based on generalized rheological body so as to solve the parameters of constant Q model.According to the seismic wave scattering theo-ry,the first-order Born approximation equation in viscoacoustic media is derived based on generalized rheological body and then the first-order Born approxima-tion of stress-velocity equation is obtained for the viscoacoustic media with con-volutional perfect matched layer (CPML ) boundary.The wave fields and records are compared through numerical simulation by full wave equation,first-order Born approximation equation and one-way wave equation.And it is also discussed that the precision of travel time and amplitude of the seismic wave obtained by the viscoacoustic first-order Born approximation equation with velocity perturbation and Q perturbation.
Keywords：rheological bodyBorn approximationimprovedτmethodvelocity perturbationQ perturbation
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：17( 661-677 )