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Conference Papers Year : 2013

3D frequency-domain seismic modeling with a Block Low-Rank algebraic multifrontal direct solver

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.
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Dates and versions

hal-00924638 , version 1 (07-01-2014)

Identifiers

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Clément Weisbecker, Patrick Amestoy, Olivier Boiteau, Romain Brossier, Alfredo Buttari, et al.. 3D frequency-domain seismic modeling with a Block Low-Rank algebraic multifrontal direct solver. Society of Exploration Geophysicists annual meeting (SEG 2013), Society of Exploration Geophysicists, 2013, Houston, Texas, United States. ⟨10.1190/segam2013-0603.1⟩. ⟨hal-00924638⟩
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