Full waveform inversion in time and frequency domain of velocity modeling in seismic imaging: FWISIMAT a Matlab code

Earth sciences research journal

Singh, Sagar¹  Kanli, Ali Ismet² 

[1] Indian Institute of Technology Roorkee, Roorkee, India;Istanbul University, Istanbul, Turkey

关键词: Seismic Imaging;    Full-Waveform Inversion;    Acoustic Wave Equation;    Gaussian Smoother;    Marmousi Velocity Model.;   

DOI  :  10.15446/esrj.v22n4.59640

学科分类：天文学(综合)

来源: Universidad Nacional de Colombia * Departamento de Geociencias

【 摘 要 】

This paper investigates the capability of acoustic Full Waveform Inversion (FWI) in building Marmousi velocity model, in time and frequency domain. FWI is an iterative minimization of misfit between observed and calculated data which is generally solved in three segments, i.e., forward modeling, which numerically solves the wave equation with an initial model, gradient computation of the objective function, and updating the model parameters, with a valid optimization method. FWI codes developed in MATLAB herein FWISIMAT (Full Waveform Inversion in Seismic Imaging using MATLAB) are successfully implemented using the Marmousi velocity model as the true model. An initial model is obtained by smoothing the true model to initiate FWI procedure. Smoothing ensures an adequate starting model for FWI, as the FWI procedure is known to be sensitive on the starting model. The final model is compared with the true model to review the amount of recovered velocities.

【 授权许可】

CC BY