(19)

(11)

EP 3 094 816 A1

(12)

(43) Date of publication: 23.11.2016 Bulletin 2016/47 (21) Application number: 15737217.8 (22) Date of filing: 12.01.2015

(51) International Patent Classification (IPC):  E21B 43/16(2006.01) E21B 43/22(2006.01) C09K 8/58(2006.01) (86) International application number: PCT/US2015/010991 (87) International publication number: WO 2015/108812 (23.07.2015 Gazette 2015/29)

(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 (30) Priority: 14.01.2014 US 201461927276 P (71) Applicant: Shell Internationale Research Maatschappij B.V. 2596 HR The Hague (NL)	(72) Inventors: FARAJZADEH, Rouhollah NL-2288 GS Rijswijk (NL) TE RIELE, Paul Marie NL-2288 GS Rijswijk (NL) (74) Representative: Matthezing, Robert Maarten et al Shell International B.V. Intellectual Property Services P.O. Box 384 2501 CJ The Hague 2501 CJ The Hague (NL)