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(11)

EP 3 601 997 A1

(12)

(43) Date of publication: 05.02.2020 Bulletin 2020/06 (21) Application number: 18716447.0 (22) Date of filing: 20.03.2018

(51) International Patent Classification (IPC):  G01N 3/08(2006.01) E21B 49/00(2006.01) G01N 33/24(2006.01) (86) International application number: PCT/US2018/023312 (87) International publication number: WO 2018/175404 (27.09.2018 Gazette 2018/39)

(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: 20.03.2017 US 201715463537 (71) Applicant: Saudi Arabian Oil Company Dhahran 31311 (SA)	(72) Inventors: HAN, Yanhui Houston, Texas 77084 (US) LAI, Bitao Houston, Texas 77084 (US) LIU, Hui-Hai Houston, Texas 77084 (US) LI, Hui Houston, Texas 77084 (US) (74) Representative: Conroy, John  Fish & Richardson P.C. Highlight Business Towers Mies-van-der-Rohe-Straße 8 80807 München 80807 München (DE)