(19)

(11)

EP 3 811 069 A1

(12)

(43) Date of publication: 28.04.2021 Bulletin 2021/17 (21) Application number: 19749472.7 (22) Date of filing: 01.07.2019

(51) International Patent Classification (IPC):  G01N 24/08(2006.01) G01V 3/32(2006.01) G01R 33/30(2006.01) (86) International application number: PCT/US2019/040100 (87) International publication number: WO 2020/009981 (09.01.2020 Gazette 2020/02)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 02.07.2018 US 201816025791 (71) Applicant: Saudi Arabian Oil Company Dhahran 31311 (SA)	(72) Inventor: HAKIMUDDIN, Mustafa Dhahran, 31311 (SA) (74) Representative: Dauncey, Mark Peter  Marks & Clerk LLP 1 New York Street Manchester M1 4HD Manchester M1 4HD (GB)