Study on the absorption tomography with pre-stack seismic reflection data based on ray theory

摘要

This paper realized the forward calculation with the ray tracing algorithm, and applied WEPIF (the wavelet envelope peak instantaneous frequency) analysis for absorption tomography. The paper presents a rapid and valid adaptive angle step ray tracing algorithm to overcome the problems of low accuracy and computational efficiency of the existing methods. The new algorithm is developed for pre-stack CMP data forward modeling. We deduce successive linearization absorption tomography algorithm combining WEPIF method and Gauss weighted interpolation, and use ART, SIRT and LSQR for iterative solution of linear systems. Applied to single and multi trace gather synthetic data, the results indicate the validity of the method.