(19)
(11) EP 1 756 622 A2

(12)

(88) Date of publication A3:
06.07.2006

(43) Date of publication:
28.02.2007 Bulletin 2007/09

(21) Application number: 05769373.1

(22) Date of filing: 17.06.2005
(51) International Patent Classification (IPC): 
G01V 3/26(2006.01)
(86) International application number:
PCT/IB2005/002468
(87) International publication number:
WO 2005/124395 (29.12.2005 Gazette 2005/52)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

(30) Priority: 18.06.2004 US 871446
18.06.2004 US 871854
18.06.2004 US 871856
18.06.2004 US 872112

(71) Applicants:
  • SERVICES PETROLIERS SCHLUMBERGER
    75007 Paris (FR)

    FR 
  • Schlumberger Canada Limited
    Calgary, Alberta T2P 0G4 (CA)

    CZ LT 
  • PRAD Research and Development N.V.
    Willemstad, Curacao (AN)

    AT DE DK ES IE IT PL RO SK 
  • SCHLUMBERGER TECHNOLOGY B.V.
    2514 JG Den Haag (NL)

    BE BG CH CY EE FI GB GR HU IS LI LU MC NL PT SE SI 
  • SCHLUMBERGER OVERSEAS, S.A.
    Panama City (PA)

    TR 

(72) Inventor:
  • The designation of the inventor has not yet been filed
     ()

(74) Representative: Mirza, Akram Karim et al
Schlumberger Cambridge Research Limited , High Cross, Madingley Road
Cambridge CB3 OEL
Cambridge CB3 OEL (GB)

   


(54) METHODS AND APPARATUS FOR MEASURING STREAMING POTENTIALS AND DETERMINING EARTH FORMATION CHARACTERISTICS