Abstract
• Properties of viscoelastic surfactants (VES). • Impact of VES on rheology and determine the best preparation mechanisms. • Different methods for VES-based spent acid preparation. • Screening and examination of new VES for acid fracturing and matrix acidizing. The unique properties of viscoelastic surfactants (VES) make them one of the essential chemicals used in oil fields. However, the temperature limitations of some VES, as well as their relatively high cost, pose significant challenges for research and chemical organizations to develop new generations of VES that effectively overcome these restrictions. This paper vastly evaluated the spent acid preparation methods and their effects on the rheological profile of VES. The data presented expressed the process of screening and examining the rheological behaviors of new VES under different temperatures and shear rates at optimum controlled pH and pressure.
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