(19)
(11) EP 1 145 046 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
28.12.2005 Bulletin 2005/52

(45) Mention of the grant of the patent:
12.10.2005 Bulletin 2005/41

(21) Application number: 00900259.3

(22) Date of filing: 12.01.2000
(51) International Patent Classification (IPC)7: G01V 1/36
(86) International application number:
PCT/GB2000/000058
(87) International publication number:
WO 2000/042448 (20.07.2000 Gazette 2000/29)

(54)

METHOD OF ATTENUATING NOISE IN THREE DIMENSIONAL SEISMIC DATA USING A PROJECTION FILTER

VERFAHREN ZUR REDUZIERUNG VON RAUSCHEN IN DREIDIMENSIONALEN SEISMISCHEN DATEN MIT EINEM PROJEKTIONSFILTER

PROCEDE POUR ATTENUER LE BRUIT DANS DES DONNEES SISMIQUES TRIDIMENSIONNELLES A L'AIDE D'UN FILTRE DE PROJECTION

(84) Designated Contracting States:
DE DK FR GB IT NL

(30) Priority: 14.01.1999 GB 9900723

(43) Date of publication of application:
17.10.2001 Bulletin 2001/42

(73) Proprietors:
  • SCHLUMBERGER HOLDINGS LIMITED
    Road Town, Tortola (VG)
    Designated Contracting States:
    DE DK GB IT NL 
  • SERVICES PETROLIERS SCHLUMBERGER
    75007 Paris (FR)
    Designated Contracting States:
    FR 

(72) Inventors:
  • ÖZBEK, Ali
    Milton Cambridge CB4 6EF (GB)
  • ÖZDEMIR, Ahmet, Kemal
    Yenimahalle 06170 Ankara (TR)
  • FERBER, Ralf
    Horsham West Sussex RH13 5HE (GB)
  • ZEROUK, Kamil
    Hove East sussex BN3 8GS (GB)

(74) Representative: Macquet, Christophe 
Schlumberger Cambridge Research Ltd, High Cross, Madingley Road
Cambridge CB3 0EL
Cambridge CB3 0EL (GB)


(56) References cited: : 
US-A- 5 182 729
US-A- 5 771 203
 US-A- 5 677 892
   
  • R. ABMA AND J. CLAERBOUT: "Lateral prediction for noise attenuation by t-x and f-x techniques" GEOPHYSICS, vol. 60, no. 6, November 1995 (1995-11) - December 1995 (1995-12), XP002137349
  • QING LI ET AL: "3-D coherency filtering" GEOPHYSICS, JULY-AUG. 1997, SOC. EXPLORATION GEOPHYSICISTS, USA, vol. 62, no. 4, pages 1310-1314, XP002137350 ISSN: 0016-8033
  • CLAERBOUT J: "Multidimensional recursive filters via a helix" GEOPHYSICS, SEPT.-OCT. 1998, SOC. EXPLORATION GEOPHYSICISTS, USA, vol. 63, no. 5, pages 1532-1541, XP002137351 ISSN: 0016-8033 cited in the application
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).