(19)

(11)

EP 2 671 100 A2

(12)

(88) Date of publication A3: 06.12.2012 (43) Date of publication: 11.12.2013 Bulletin 2013/50 (21) Application number: 12742187.3 (22) Date of filing: 27.01.2012

(51) International Patent Classification (IPC):  G01V 1/28(2006.01) G06F 19/00(2011.01) G01V 1/30(2006.01) (86) International application number: PCT/US2012/022903 (87) International publication number: WO 2012/106201 (09.08.2012 Gazette 2012/32)

(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: 31.01.2011 US 201113017995 31.01.2011 US 201113018015 31.01.2011 US 201113018044 (71) Applicant: Chevron U.S.A. Inc. San Ramon, CA 94583 (US)	(72) Inventors: POSAMENTIER, Henry W. San Ramon, California 94583 (US) VU, Cung Khac San Ramon, California 94583 (US) DISIENA, James P. San Ramon, California 94583 (US) DYGERT, Todd San Ramon, California 94583 (US) (74) Representative: Nash, David Allan  Haseltine Lake LLP Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)