@article{fdi:010089131,
  title = {{I}s 3{D} frequency-domain {FWI} of full-azimuth/long-offset {OBN} data feasible ? : the {G}orgon data {FWI} case study},
  author = {{O}perto, {S}. and {A}mestoy, {P}. and {A}ghamiry, {H}. and {B}eller, {S}. and {B}uttari, {A}. and {C}ombe, {L}. and {D}olean, {V}. and {G}erest, {M}. and {G}uo, {G}. and {J}olivet, {P}. and {L}'{E}xcellent, {J}.{Y}. and {M}amfoumbi, {F}. and {M}ary, {T}. and {P}uglisi, {C}. and {R}ibodetti, {A}lessandra and {T}ournier, {P}.{H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}requency-domain full-waveform inversion ({FWI}) is potentially amenable to efficient processing of full-azimuth long-offset stationary-recording seabed acquisition carried out with a sparse layout of ocean-bottom nodes ({OBN}s) and broadband sources because the inversion can be

performed with a few discrete frequencies. {H}owever, computing the solution of the forward (boundary-value) problem efficiently in the frequency domain with linear algebra solvers remains a challenge for large computational domains involving tens to hundreds of millions of parameters.

{W}e illustrate the feasibility of 3{D} frequency-domain {FWI} with a subset of the 2015/2016 {G}orgon {OBN} data set in the {N}orth {W}est {S}helf, {A}ustralia. {W}e solve the forward problem with the massively parallel multifrontal direct solver {MUMPS}, which includes four key features to reach high

computational efficiency: an efficient parallelism combining message-passing interface and multithreading, block low-rank compression, mixed-precision arithmetic, and efficient processing of sparse sources. {T}he {G}orgon subdata set involves 650 {OBN}s that are processed as reciprocal

sources and 400,000 sources. {M}onoparameter {FWI} for vertical wavespeed is performed in the viscoacoustic vertically transverse isotropic approximation with a classical frequency continuation approach proceeding from a starting frequency of 1.7 {H}z to a final frequency of 13 {H}z. 

{T}he target covers an area ranging from 260 km2 (frequency ? 8.5 {H}z) to 705 km2 (frequency ? 8.5 {H}z) for a maximum depth of 8 km. {C}ompared to the starting model, {FWI} dramatically improves the reconstruction of the bounding faults of the {G}orgon horst at reservoir depths as well

as several intrahorst faults and several horizons of the {M}ungaroo {F}ormation down to a depth of 7 km. {S}eismic modeling reveals a good kinematic agreement between recorded and simulated data, but amplitude mismatches between the recorded and simulated reflection from the

reservoir suggest elastic effects. {T}herefore, future works involve multiparameter reconstruction for density and attenuation before considering elastic {FWI} from hydrophone and geophone data.},
  keywords = {},
  booktitle = {},
  journal = {{T}he {L}eading {E}dge},
  volume = {42},
  numero = {3},
  pages = {173--183},
  ISSN = {1070-485{X}},
  year = {2023},
  DOI = {10.1190/tle42030173.1},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089131},
}