3D frequency-domain seismic modeling with a Block Low-Rank algebraic multifrontal direct solver
WEISBECKER ; AMESTOY ; BOITEAU ; BROSSIER ; BUTTARI ; L'EXCELLENT ; OPERTO ; VIRIEUX
Type de document
COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)
Langue
anglais
Auteur
WEISBECKER ; AMESTOY ; BOITEAU ; BROSSIER ; BUTTARI ; L'EXCELLENT ; OPERTO ; VIRIEUX
Résumé / Abstract
Three-dimensional frequency-domain full waveform inversion of fixed-spread data can be efficiently performed in the viscoacoustic approximation when seismic modeling is based on a sparse direct solver. We present a new algebraic Block Low- Rank (BLR) multifrontal solver which provides an approximate solution of the time-harmonic wave equation with a reduced operation count, memory demand and volume of communication relative to the full-rank solver. We show some preliminary simulations in the 3D SEG/EAGE overthrust model, that give some insights on the memory and time complexities of the low-rank solver for frequencies of interest in fullwaveform inversion (FWI) applications.
Source
SEG Technical program expanded abstracts, num. , pp. 3411-3416 p.
Editeur
SOCIETY OF EXPLORATION GEOPHYSICISTS - SEG
