(19)
(11) EP 2 257 838 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:
25.11.2015 Bulletin 2015/48

(45) Mention of the grant of the patent:
10.06.2015 Bulletin 2015/24

(21) Application number: 09725900.6

(22) Date of filing: 13.03.2009
(51) International Patent Classification (IPC): 
G01V 1/36(2006.01)
(86) International application number:
PCT/GB2009/000676
(87) International publication number:
WO 2009/118511 (01.10.2009 Gazette 2009/40)

(54)

NOISE ATTENUATION OF SEISMIC DATA

RAUSCHUNTERDRÜCKUNG BEI SEISMISCHEN DATEN

ATTÉNUATION DU BRUIT DE DONNÉES SISMIQUES

(84) Designated Contracting States:
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 SE SI SK TR

(30) Priority: 25.03.2008 GB 0805341

(43) Date of publication of application:
08.12.2010 Bulletin 2010/49

(73) Proprietor: Schlumberger Technology B.V. (STBV)
2514 JG's-Gravenhage (NL)

(72) Inventors:
  • ÖZBEK, Ali
    Cambridgeshire CB24 6EF (GB)
  • FORMAN, Peter
    West Sussex RH17 7ED (GB)

(74) Representative: Li, Boxi 
Schlumberger Cambridge Research Limited Intellectual Property Law High Cross Madingley Road
Cambridge CB3 0EL
Cambridge CB3 0EL (GB)


(56) References cited: : 
WO-A-97/26559
WO-A-2005/017564
 WO-A-99/60940
US-A- 5 586 026
   
  • PRESTI L L ET AL: "A realizable paraunitary perfect reconstruction QMF bank based on IIR filters" SIGNAL PROCESSING, ELSEVIER SCIENCE PUBLISHERS B.V. AMSTERDAM, NL, vol. 49, no. 2, 1 March 1996 (1996-03-01), pages 133-143, XP004007202 ISSN: 0165-1684
   
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).