The process of development of a gelatinous plugging agent usable in heterogeneous formations at high temperatures is discussed. The static and dynamic properties of the agent and its optimal concentration are determined by variation. To optimize the plugging process, the experimental data are integrated with the numerical modeling data obtained by CMG software. The plugging agent contains 0.03% coagulant, 2.75% crosslinking agent I, 2.1 % crosslinking agent II, and 8% main heat-resistant agent. Gel viscosity is 2000-5000 mPaai...sec, pH is 6-8, degree of plugging > 90.39%, and the working temperature > 280 A degrees C. The optimum injection control profile radius at which oil recovery is increased and flooding is reduced is 20 m.