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(11)

EP 4 680 998 A2

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(88) Date of publication A3: 07.11.2024 (43) Date of publication: 21.01.2026 Bulletin 2026/04 (21) Application number: 24785852.5 (22) Date of filing: 05.04.2024

(51) International Patent Classification (IPC):  G01V 1/40(2006.01) E21B 47/06(2012.01) E21B 47/10(2012.01) (52) Cooperative Patent Classification (CPC): E21B 2200/20; E21B 47/10; E21B 47/07; E21B 47/006; E21B 43/00 (86) International application number: PCT/US2024/023322 (87) International publication number: WO 2024/211747 (10.10.2024 Gazette 2024/41)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 06.04.2023 US 202363494573 P (71) Applicants: Services Pétroliers Schlumberger 75007 Paris (FR) FR  GeoQuest Systems B.V. 2514 JG The Hague (NL) AL AT BE BG CH CY CZ DE DK EE ES FI GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

(72) Inventor: HAVRE, Kjetil 1366 Lysaker (NO) (74) Representative: Schlumberger Intellectual Property Department  Parkstraat 83 2514 JG Den Haag 2514 JG Den Haag (NL)