Abstract:For identifying more and more complex structures,conventional one-way wave migrations are obviously inadequate in terms of imaging accuracy and amplitude preservation.To solve this problem we propose in this paper a generalized screen propagator migration based on particle swarm optimization and amplitude-preserved imaging conditions.First,on the basis of conventional amplitude-preserved acoustic wave equation,a particle swarm optimization is used to perform the global optimal coefficients of vertical wave number expansion in the generalized screen propagator,and to improve its imaging accuracy for steep dip strata.Then a Gaussian-window function optimization is used to optimize deconvolution imaging conditions to ensure both the amplitude preservation and the calculation stability.Model trials and seismic data applications show that the proposed migration can not only improve the complex structure imaging,but also reduce the amplitude attenuation in strata.
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