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Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines

Iglauer, Stefan and Wu, Yongfu and Shuler, Patrick and Tang, Yongchun and Goddard, William A., III (2011) Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines. Journal of Petroleum Science and Engineering, 75 (3-4). pp. 304-311. ISSN 0920-4105.

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We evaluated the rheological characteristics of ι- and κ-Carrageenan in aqueous solutions. Viscosities strongly increased with increasing polymer concentration or salinity. Monovalent Na^+ cations were more effective in increasing viscosity than divalent Ca^(2+) cations. A more complex brine containing Na^+, Mg^(2+) and Ca^(2+) cations also showed high viscosities at a high salinity. We observed shear thinning behavior for these polysaccharide solutions. We explain these rheological phenomena with molecular processes, specifically the conformation change of the ι-Carrageenan from random coil to double helix. In the context of enhanced oil recovery, ι-Carrageenan solutions can reach much higher viscosities at high salinities than standard polyacrylamide solutions. Moreover, Carrageenans are renewable, nontoxic, green substances.

Item Type:Article
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Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2010 Elsevier B.V. Received 3 June 2009; accepted 29 November 2010. Available online 9 December 2010.
Subject Keywords:iota- and kappa-Carrageenan; Polymer solution; High salinity; Mobility control; Shear thinning; Rheology; Gelling mechanism; Near-wellbore fluid; Fracturing fluid
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Issue or Number:3-4
Record Number:CaltechAUTHORS:20110310-100110022
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Official Citation:Stefan Iglauer, Yongfu Wu, Patrick Shuler, Yongchun Tang, William A. Goddard III, Dilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines, Journal of Petroleum Science and Engineering, Volume 75, Issues 3-4, January 2011, Pages 304-311, ISSN 0920-4105, DOI: 10.1016/j.petrol.2010.11.025. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22799
Deposited By: Ruth Sustaita
Deposited On:10 Mar 2011 18:20
Last Modified:03 Oct 2019 02:40

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