ACS Omega · 2020 · 20 citations · 78 references
EngineeringChemical EngineeringMaterials ScienceEnhanced Oil RecoveryPolymer ChemistryRheologyExtensional RheologyPolymer CharacterizationPolymer RheologyRheological Characterization Of SuspensionsRheology Of Complex FluidsSurfactantsAnionic SurfactantsCritical Micelle ConcentrationEnhanced Oil Recovery MechanismsExtensional RheometryExtensional ViscoelasticityPolymer-surfactant SystemsPorous MediaRheological Characterization
is studied at varying ionic strengths (1-10%). A capillary break-up extensional rheometer is used for performing extensional rheological characterization. Results revealed that the extensional resistance of HPAM is enhanced in the presence of a surfactant. Particularly, around the critical micelle concentration value of the surfactant (0.1%), HPAM showed higher extensional resistance. Higher extensional resistance for the SP system is observed with deionized water when compared to 1% NaCl. HPAM showed improved performance at 1% NaCl salinity when compared to the higher concentration of NaCl salinity. However, the presence of even 1% of calcium ions is detrimental to the extensional properties of HPAM.
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