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(11)

EP 3 271 794 A1

(12)

(43) Date of publication: 24.01.2018 Bulletin 2018/04 (21) Application number: 15885729.2 (22) Date of filing: 17.03.2015

(51) International Patent Classification (IPC):  G06F 1/16(2006.01) G01V 3/18(2006.01) E21B 47/00(2012.01) G01V 3/38(2006.01) (86) International application number: PCT/US2015/021054 (87) International publication number: WO 2016/148706 (22.09.2016 Gazette 2016/38)

(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: MA (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77032 (US)	(72) Inventors: NAYAK, Aditya, B. Houston, TX 77044 (US) PRICE, James, M. The Woodlands, TX 77380 (US) PERKINS, David, L. The Woodlands, TX 77385 (US) (74) Representative: McWilliams, David John  Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)