|HAO WAKATI AKITELUS009771773B2 ANIMAU MAI MULTET (12 ) United States Patent ( 10 ) Patent No. : US 9 ,771 , 773 B2 Reddy et al. (45 ) Date of Patent: Sep . 26 , 2017 (54 ) DIUTAN AS A RHEOLOGICAL MODIFIER IN ( 52) U . S . CI. SOREL CEMENTS CPC .. .. .. .. E21B 33/ 14 ( 2013 .01 ) ; C04B 24 / 34 ( 2013 .01 ) ; C04B 24 / 38 ( 2013 .01 ) ; C04B 28 / 32 ( 71 ) Applicant : Halliburton Energy Services , Inc ., (2013 .01 ) ; C09K 8 / 467 ( 2013 .01 ) ; C04B 2103 /0079 (2013 .01 ) ; C04B 2103/ 0085 Houston , TX (US ) (2013 . 01 ) (72 ) Inventors: B . Raghava Reddy, The Woodlands , (58 ) Field of Classification Search TX (US ) ; Natalie Lynn Pascarella , None Houston , TX (US ) ; Antonio Recio , III , See application file for complete search history . Humble , TX (US ) ; Larry Steven Eoff , References Cited Porter , TX (US ) ( 56 ) U . S . PATENT DOCUMENTS (73 ) Assignee : Halliburton Energy Services, Inc . , 5 , 175 ,278 A 12 / 1992 Peik et al. Houston , TX (US ) 5 ,220 , 960 A * 6 / 1993 Totten .. .. .. .. C04B 28 / 32 ( * ) Notice : Subject to any disclaimer , the term of this 106 /687 patent is extended or adjusted under 35 (Continued ) U . S . C . 154 ( b ) by 0 days . FOREIGN PATENT DOCUMENTS (21 ) Appl. No. : 15 /310 ,737 WO 2008096165 8 /2008 ( 22 ) PCT Filed : Jun . 12 , 2014 OTHER PUBLICATIONS ( 86 ) PCT No. : PCT /US2014 /042158 International Search Report and Written Opinion of PCT Applica $ 371 ( c ) ( 1 ) , tion No. PCT/ US2014 /042158 dated Mar. 11 , 2015 : pp . 1 - 12 . ( 2 ) Date : Nov . 11 , 2016 (Continued ) Primary Examiner - Anuradha Ahuja ( 87 ) PCT Pub . No .: WO2015 / 191071 ( 74) Attorney , Agent, or Firm — Chamberlain Hrdlicka PCT Pub . Date : Dec . 17 , 2015 (57 ) ABSTRACT (65 ) Prior Publication Data Systems and methods for modifying rheology of a cement US 2017 / 0073567 A1 Mar. 16 , 2017 slurry are described . Methodsmay include forming a cement slurry composition and placing the cement slurry composi (51 ) Int . Ci. tion in a subterranean formation . The cement slurry com E21B 33 / 14 ( 2006 . 01 ) position contains water , diutan , and a magnesium oxychlo COOK 8 /467 ( 2006 .01 ) ride - based Sorel cement and can have specified properties C04B 28 /32 ( 2006 .01 ) for a ratio of diutan to water , a thixotropic index value , and C04B 24 / 38 ( 2006 .01 ) a yield point. C04B 24 /34 ( 2006 . 01 ) C04B 103 / 00 ( 2006 .01 ) 11 Claims, 1 Drawing Sheet A CONTROL - - - - - - - LINEAR (CONTROL ) XANTHAN - - - - POLY . XANTHAN DIUTAN - - - - POLY . (DIUTAN ) y = -0 . 0002x® + 0 . 4537x + 43. 103 R ? = 0. 9966 receber y = - 0 .0001x2 + 0. 282x + 8 .4887 DNALREADING R ? - 0 .999 y = 0 . 0438 % + 0 .4302 RP = 0 .9898 FIG . 1 pllusliolion.com ip'llustration.com * 100 200 RPM300 400 500 600 Lester D ' uft Drowires US 9 , 771, 773 B2 Page 2 (56 ) References Cited 2010 /0282466 Al * 11/ 2010 Brenneis . .. .. C04B 28/ 021 166 / 293 U . S . PATENT DOCUMENTS 2010 /0307381 A1 12 /2010 Margheritis et al . 2011/ 0275736 A1 * 11/ 2011 Iverson . C04B 24 / 38 5 , 588 , 488 A * 12 / 1996 Vijn .. .. .. .. .. .. C04B 24 / 163 523 / 130 106 / 724 2012 /0138299 A1 * 6 /2012 Joseph .. .. .. .. C04B 28 /06 6 ,664 ,215 B1 12 /2003 Tomlinson 166 / 293 7 , 350 ,575 B1 4 / 2008 Lewis et al. 2013 / 0312968 A1* 11/ 2013 Ladva CO9K 8 /68 7 , 350 , 576 B2 4 /2008 Robertson et al. 166 / 293 7 , 530 , 394 B2 5 / 2009 Santra et al. 7 , 544 , 641 B2 6 / 2009 Robertson et al. OTHER PUBLICATIONS 7 , 654 ,326 B1 2 / 2010 Santra et al. 7 , 789 , 149 B2 9 / 2010 Santra et al . Anonymous , “ CP Kelco Diutan Gum , ” Product Information , CP 7 , 833 , 344 B2 11/ 2010 Santra et al. Kelco , retrieved Nov . 11 , 2016 : pp . 1 - 2 , < http :/ /cpkelco .com /prod 7 , 854 , 262 B2 12 / 2010 Santra et al . ucts /diutan - gum > , 7 , 893 ,011 B2 2 / 2011 Lewis et al . Diltz et al. , “ Location of O -acetyl groups in S -657 using the 2007 /0125534 A1 * 6 / 2007 Reddy C04B 28 / 06 reductive -cleavage method , " Carbohydrate Research , 2001 , vol. 166 /277 331 : pp . 265 - 270 . 2008/ 0156225 A1 * 7 / 2008 Bury .. C04B 28 /02 Hewlett , ed ., Lea ' s Chemistry of Cement and Concrete Fourth 106 / 14 .05 Edition , Chapter 14 : “ Special Cements , " Elsevier , New York , 1998 : 2008 /0308011 Al 12/ 2008 Brothers et al . pp . 813 -820 . 2009 /0197991 A1 * 8 /2009 Bury . .. C04B 28 / 02 524 / 2 * cited by examiner U . S . Patent Sep . 26 , 2017 US 9 ,771 ,773 B2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - — CONTROL - - - - - LINEAR (CONTROL ) - IT XANTHAN - - - - POLY . (XANTHAN ) - A DIUTAN - - - POLY . (DIUTAN ) - - - - - y = - 0 . 0003x4 + 0 .4537x + 43 .103 - R2 = 0. 9966 - - - - - - - y = - 0. 0001x2 + 0 .282x + 8. 4887 - - - - - - R2 = 0. 999 - - - - DIALREADING _ - ? - - - - - - - = = - - - R = - * - - y = 0. 0438x + 0 .4302 - R2 = 0 .9988 - mpaamme FIG . 1 ipillustration.com 0 A ipillustration.com O 100 200 300 400 500 600 RPM A CONTROL — XANTHAN A DIUTAN - - - - - - - RPMREADING/DIAL - - Ñ©a?A - - FIG . 2 100 200 300 400 500 600 RPM Letter Draft Drawings US 9 , 771, 773 B2 DIUTAN AS A RHEOLOGICAL MODIFIER IN operations can mitigate the migration of a fluid into an SOREL CEMENTS unwanted location of the subterranean formation . Likewise, in the reverse of a fluid loss event, incomplete FIELD fluid blocking can result in production of an unwanted fluid 5 from one or more zones of a subterranean formation . For The present disclosure relates to systems and methods for example , incomplete formation of a fluid sealmay result in wellbore servicing fluids, and , more specifically , to systems the unwanted incursion of formation water or brine into a and methods for cement compositions . wellbore , which may decrease the value of a hydrocarbon resource produced therefrom . BACKGROUND 10 Certain non - hydraulic cements ( e . g ., Sorel cements ) may Achieving optimal rheological behavior in cement slur be designed to remain as a low viscosity fluid during ries is imperative to use of cement for drilling and /or placement. The cement slurry may then sets rapidly at a cementing . An effective cement system provides isolation given formation temperature . The transition from fluid state between subterranean zones . To effectively utilize cement in 15 to solid state may be almost immediate , resulting in essen a well operation , the cement slurry, upon mixing with water tially zero gas migration or channeling. This “ right angle and necessary additives, fillers , etc . , must exhibit fluid set ” occurs because the setting process is highly exothermic . behavior that allows it to be pumped efficiently downhole Due to low viscosity , however, the fluid may have a ten without hardening , settling , or damaging equipment and be dency to flow to the low side in a horizontal well . This may placed in the desired location where it will set into a 20 result in incomplete sealing of high side of the horizontal hardened material. well allowing for undesired fluids flow into the well through Treatment fluids can be used in a variety of subterranean the unsealed portions. It is important that, once placed , the operations . Such subterranean operations can include , with fluid retain its shape without flowing to lower side of the out limitation , drilling operations , stimulation operations, wellbore . The fluid preferably seals the zone uniformly upon production operations, remediation operations, sand control 25 hardening . This will require the fluid possess shear thinning treatments and the like . As used herein , the terms “ treat, " or pseudoplastic rheological properties to prevent slumping . treatment, ” “ treating ” and other variants thereof refer to Even though viscosifiers such as xanthan have been used to any subterranean operation that uses a fluid in conjunction prevent particle settling of insoluble components (magne with achieving a desired function and /or for a desired sium oxide ) of the fluid , the rheology of the resulting viscous purpose . Use of these terms does not imply any particular 30 fluid may not prevent slumping of the fluid in a horizontal action by the treatment fluid or a component thereof unless well. expressly described as such herein . Illustrative treatment operations can include , for example , fracturing operations, BRIEF DESCRIPTION OF THE DRAWINGS gravel packing operations , acidizing treatments , scale dis solution and removal operations , consolidation operations , 35 The accompanying drawings, which are included to pro conformance control operations, and the like . vide a further understanding of the disclosure and are When performing a subterranean treatment operation , incorporated in and constitute a part of this specification , including those noted above , it can sometimes be desirable illustrate preferred embodiments of the disclosure and to temporarily or permanently block or divert the flow of a together with the detailed description serve to explain the fluid within at least a portion of the subterranean formation 40 principles of the disclosure. In the drawings: by forming a fluid seal therein . The formation of a fluid seal FIG . 1 is a graph of rheological data obtained for the three can itself be considered a treatment operation . Whether the slurries and reported in Tables 2 , 4 and 6 according to an fluid seal is intended to be temporary or permanent can exemplary embodiment. determine the type of agent used in its formation . Illustrative FIG . 2 is a