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dc.contributor.authorIglauer, Stefan
dc.contributor.authorWu, Y.
dc.contributor.authorShuler, P.
dc.contributor.authorTang, Y.
dc.contributor.authorGoddard, W.
dc.identifier.citationIglauer, Stefan and Wu, Yongfu and Shuler, Patrick and Tang, Yongchun and Goddard III, William A. 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.

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 Ca2+ cations. A more complex brine containing Na+, Mg2+ and Ca2+ 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.

dc.publisherElsevier BV
dc.subjectFracturing fluid
dc.subjectMobility control
dc.subjectNear-wellbore fluid
dc.subjectGelling mechanism
dc.subjectShear thinning
dc.subjectι- and κ-Carrageenan
dc.subjectHigh salinity
dc.subjectPolymer solution
dc.titleDilute iota- and kappa-Carrageenan solutions with high viscosities in high salinity brines
dc.typeJournal Article
dcterms.source.titleJournal of Petroleum Science and Engineering
curtin.departmentDepartment of Petroleum Engineering
curtin.accessStatusFulltext not available

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