(19)
(11)EP 2 634 603 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
25.02.2015 Bulletin 2015/09

(43)Date of publication A2:
04.09.2013 Bulletin 2013/36

(21)Application number: 13157039.2

(22)Date of filing:  27.02.2013
(51)Int. Cl.: 
G01V 1/36  (2006.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 28.02.2012 US 201213407049

(71)Applicant: PGS Geophysical AS
0216 Oslo (NO)

(72)Inventors:
  • van Borselen, Roald G.
    2254BC Voorschoten (NL)
  • van den Berg, Peter M.
    2498ER The Hague (NL)
  • Fokkema, Jacob T.
    3118LP Schiedam (NL)

(74)Representative: Lord, Michael 
Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street
London EC2A 2ES
London EC2A 2ES (GB)

  


(54)Methods and Systems for Deghosting Marine Seismic Wavefields Using Cost-Functional Minimization


(57) Computational systems and methods to be carried out by the computational systems for determining streamer-depth bias during exploration-seismology experiments are disclosed. In one aspect, the method computationally transforms recorded wavefield data from the space-time domain to a wavenumber-frequency domain and computationally deghosts the wavefield data in the wavenumber-frequency domain. The deghosted wavefield data may then computationally transformed from the wavenumber-frequency domain back to the space-time domain and stored. The computational methods include iterative minimization of a cost functional in the wavenumber-frequency domain.