Table of Contents Author Guidelines Submit a Manuscript
Mathematical Problems in Engineering
Volume 2016, Article ID 4750438, 8 pages
http://dx.doi.org/10.1155/2016/4750438
Research Article

Time Domain Waveform Inversion for the Model Based on the First-Order Viscoacoustic Wave Equations

1Institute of Wave and Information, Xi’an Jiaotong University, Xi’an 710049, China
2National Engineering Laboratory for Offshore Oil Exploration, Xi’an 710049, China

Received 2 February 2016; Accepted 17 May 2016

Academic Editor: Yannis Dimakopoulos

Copyright © 2016 Guowei Zhang and Jinghuai Gao. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Propagating seismic waves are dispersed and attenuated in the subsurface due to the conversion of elastic energy into heat. The absorptive property of a medium can be described by the quality factor . In this study, the first-order pressure-velocity viscoacoustic wave equations based on the standard linear solid model are used to incorporate the effect of . For the model inversion, an iterative procedure is then proposed by minimizing an objective function that measures the misfit energy between the observed data and the modeled data. The adjoint method is applied to derive the gradients of the objective function with respect to the model parameters, that is, bulk modulus, density, and -related parameter . Numerical tests on the crosswell recording geometry indicate the feasibility of the proposed approach for the anomaly estimation.