Since most of the fields in the Absheron peninsula of the Republic of Azerbaijan are at the final stage of development, an inevitable reduction in hydrocarbon production is expected. It is planned to support oil production at the current level through the reconstruction of wells of the inactive fund. An increase in the proportion of formation water in well production, the presence of intra-reservoir, annulus and other cross-flows in this region, in most cases, is associated with inefficient isolation work. The development of effective recipes for cement slurries with controlled rheological properties is relevant. To regulate the rheological properties of cement slurries, the products of the company «Matanat A» «İzo-Sem» were used as an additive. In the course of the experiments, the influence of «İzo-Sem» dispersions on the physicochemical parameters of the cement stone was studied. When regulating the rheological properties of cement slurries with «İzo-Sem» additives, it is necessary to determine the effect of thermobaric factors on the values of these properties. In studies to assess the effect of temperature on the rheological properties of cement slurries with the addition of «İzo-Sem», they were carried out for the temperature range of 25÷75 °C. Dry mix of grout cement G-CC-1 (APİ Spec 10A Class G-HSR) was used in the studies. Keywords: Cement; Insulating additive; Plastic viscosity; Shear stress; Bottomhole zone; Thixotropy; Dispersed systems; Thermobaric factors.