(19)
(11) EP 2 005 154 A2

(12)

(88) Date of publication A3:
18.09.2008

(43) Date of publication:
24.12.2008 Bulletin 2008/52

(21) Application number: 07754843.6

(22) Date of filing: 05.04.2007
(51) International Patent Classification (IPC): 
G01N 33/26(2006.01)
E21B 49/10(2006.01)
 G01N 21/41(2006.01)
(86) International application number:
PCT/US2007/008392
(87) International publication number:
WO 2007/120553 (25.10.2007 Gazette 2007/43)
(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 LV MC MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 10.04.2006 US 790657 P
10.04.2006 US 790615 P
04.04.2007 US 696537

(71) Applicant: Baker Hughes Incorporated
Houston, TX 77019 (US)

(72) Inventors:
  • DIFOGGIO, Rocco
    Houston, Texas 77099 (US)
  • SIMPSON, Angus
    Cypress, TX 77429 (US)

(74) Representative: Jeffrey, Philip Michael 
Frank B. Dehn & Co. St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) SYSTEM AND METHOD FOR ESTIMATING FILTRATE CONTAMINATION IN FORMATION FLUID SAMPLES USING REFRACTIVE INDEX