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SUMMARY:Full Waveform Inversion in Laplace Domain - Calandra\, H (Schlumbe
 rger Cambridge Research)
DTSTART:20111214T153000Z
DTEND:20111214T161500Z
UID:TALK34957@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Seismic Full Waveform Inversion (FWI) consists in the estimati
 on of Earth's subsurface structure based on measurements of physical field
 s near its surface. It is based on the minimization of an objective functi
 on measuring the difference between predicted and observed data. FWI is mo
 stly formulated in time or Fourier domain. However FWI diverges if the sta
 rting model is far from the true model. This is consequence of the lack of
  low frequency in the seismic sources which limits the recovery of the lar
 ge-scale structures in the velocity model. Re-formulating FWI in the Lapla
 ce domain using a logarithmic objective function introduces a fast and eff
 icient method capable to recover long-wavelength velocity structure starti
 ng from a very simple initial solution and independent of the frequency co
 ntent of the data. In this presentation we will present the FWI formulated
  in Laplace domain and its application to synthetic and field seismic data
 .\n\n
LOCATION:Seminar Room 1\, Newton Institute
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