eprintid: 6276
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/62/76
datestamp: 2023-11-09 16:18:02
lastmod: 2023-11-09 16:18:02
status_changed: 2023-11-09 16:05:30
type: article
metadata_visibility: show
creators_name: Prajapati, S.
creators_name: Ghosh, D.
title: Acoustic 2D full waveform inversion to solve gas cloud challenges
ispublished: pub
keywords: acoustic method; algorithm; atmospheric gas; inverse problem; wave equation; wave propagation; waveform analysis
note: cited By 1
abstract: The existing conventional inversion algorithm does not provide satisfactory results due to the complexity of propagated wavefield though the gas cloud. Acoustic full waveform inversion has been developed and applied to a realistic synthetic offshore shallow gas cloudfeature with Student-t approach, with and without simultaneous sources encoding. As a modeling operator, we implemented the grid based finite-difference method in frequency domain using second order elastic wave equation. Jacobin operator and its adjoint provide a necessary platform for solvingfull waveform inversion problem in a reduced Hessian matrix. We invert gas cloud model in 5 frequency band selected from 1 to 12 Hz, each band contains 3 frequencies. The inversion results are highly sensitive to the misfit. The model allows better convergence and recovery of amplitude losses. This approach gives better resolution then the existing least-squares approach. In this paper, we implement the full waveform inversion for low frequency model with minimum number of iteration providing a better resolution of inversion results. © 2015 by the Istituto Nazionale di Geofisica e Vulcanologia. All rights reserved.
date: 2015
publisher: Editrice Compositori s.r.l.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943261698&doi=10.4401%2fag-6720&partnerID=40&md5=f85b2e78e830a6a600a8311080555d80
id_number: 10.4401/ag-6720
full_text_status: none
publication: Annals of Geophysics
volume: 58
number: 4
refereed: TRUE
issn: 15935213
citation:   Prajapati, S. and Ghosh, D.  (2015) Acoustic 2D full waveform inversion to solve gas cloud challenges.  Annals of Geophysics, 58 (4).   ISSN 15935213