Siberian Federal University

A study of the colloidal stability of modified fracturing gels was performed. Guar-based cross-linked gels were considered. Spherical nanoparticles of silicon oxide and aluminum oxide of different sizes, as well as single-walled carbon nanotubes, were used as modifiers. The mass concentration of nanoparticles varied from 0.01 to 0.4 %, and carbon nanotubes – from 0.01 to 0.1 %. The cross-linked gels studied were shown to be resistant to particle aggregation and sedimentation. It was found that with increasing concentration of nanoparticles and their average size, the colloidal stability of hydraulic fracturing gels increases. Gels with single-walled carbon nanotubes were found to have higher colloidal stability