A viscoelastic surfactant (VES) based fluid has been proven to be a cleaner alternative to the conventional polymer based fluid. However, there are still certain technical challenges that need to be overcome to make it as a viable alternative. High fluid loss observed with VES fluids is one such issue that is investigated in this paper. It is known that certain nanoparticles can improve the rheology and fluid loss efficiency of VES fluid when added individually. Lab experiment results demonstrate that in certain conditions adding two different nanoparticles can act synergistically to improve the fluid efficiency more than when adding only one of the nanoparticles.

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