Study on the Thermal Stability of Viscoelastic Surfactant-Based
Fluids Bearing Lamellar Structures
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Abstract
A detailed
study has been done on the phase behavior and rheological
properties of viscoelastic surfactant (VES)-based fracturing fluids
bearing lamellar liquid crystal structures that are developed from
two surfactants (SDS and NaOA) and three co-surfactants (propan-2-ol, <i>iso</i>-amyl alcohol, and 2-ethyl hexanol) in the presence of
clove oil as the organic phase and water as the aqueous phase. Lamellar
liquid crystals prepared from NaOA/2-ethyl hexanol/clove oil/water
system demonstrated the best viscoelastic properties among all the
developed fluids, because it exhibited resistance to high temperature
and shear conditions. The addition of alkali and nanoparticles enhanced
the viscoelastic properties, which were observed from static and dynamic
rheological tests