<p>The hydraulic fracturing method is currently a major tool for increasing the productivity of low-permeability reservoirs, just as in traditional hydrocarbon production. One of the key areas of optimizing the hydraulic fracturing technology is to improve the composition of fracturing fluids and transport of proppants that ensure the formation and stability of high conductivity fractures. The use of various nanoadditives to improve hydraulic fracturing fluids is one of the promising areas. This work is devoted to a systematic study of the interaction features of nanomodified crosslinked gels for hydraulic fracturing and proppant. The effect of proppant concentration (from 0.5 to 1.5&#xa0;kg/L) and its size (0.6–1.25&#xa0;mm) on rheological characteristics and proppant-carrying capacity of nanomodified gels is studied. Guar gum was used as a gelling agent for the production of hydraulic fracturing gels. Spherical silicon oxide nanoparticles with an average size of 50 and 114&#xa0;nm and unique aluminum oxide nanofibers (ANF) with their mass concentration ranging from 0.2 to 0.8% are used as nanoadditives. Previously, such systematic studies have not been performed. It has been shown that the addition of nanoparticles can significantly (up to two times) increase the carrying capacity of gels. At the same time, the use of nanomodified hydraulic fracturing gels is most effective at high loads and large sizes of proppant particles. The addition of nanoparticles allows minimizing the concentration of the gelling agent without losing the carrying ability of the gel and increasing the carrying ability of nanomodified gels at high temperatures. This opens up new possibilities for further optimization and improvement of formulations of nanomodified gels for hydraulic fracturing.</p>