(19)

(11)

EP 2 788 793 A1

(12)

(43) Date of publication: 15.10.2014 Bulletin 2014/42 (21) Application number: 13788421.9 (22) Date of filing: 07.05.2013

(51) International Patent Classification (IPC):  G01V 1/38(2006.01) (86) International application number: PCT/NO2013/050082 (87) International publication number: WO 2013/169117 (14.11.2013 Gazette 2013/46)

(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 (30) Priority: 07.05.2012 US 201213465653 07.05.2012 NO 20120520 (71) Applicant: Fugro Norway AS 0275 Oslo (NO)	(72) Inventor: PRITCHARD, Declan N-0275 Oslo (NO) (74) Representative: Regimbeau  20, rue de Chazelles 75847 Paris Cedex 17 75847 Paris Cedex 17 (FR)