The relevance of the study is caused by the need to expand the fuel and energy and mineral resources base through the development of renewable, high-potential mineralized resources of thermal water deposits. However, the exploitation of such deposits is hindered by the high degree of mineralization of natural brines. The use of binary geothermal power plants that implement the Rankine thermodynamic cycle for utilization of thermal energy allows us to solve this problem and obtain relatively cheap electrical energy. There is a need to search and evaluate methods for improving the energy efficiency of thermodynamic cycles, implemented in the development of one of the most promising deposits of thermal waters of Dagestan – Kumukh. A positive assessment of the prospects for development of geothermal resources of the field shows significant potential for improving the economic structure of the region. Purpose: to evaluate the energy efficiency of a binary geothermal power plant, which is based on the organic Rankine cycle in subcritical and supercritical cycles and in different modes of injection of waste coolant for the Kumukh thermal water field; to show the prospects and effectiveness of integrated development of geothermal resources of the field. Object: geothermal systems for electric power development of high potential mineralized thermal waters of the field. The research methods are based on the use of geological exploration, hydrothermal and geochemical research data on the Kumukh thermal water deposit, methods of mathematical modeling and optimization. Results. On the example of a specific thermal water deposit, the technological parameters of the primary circuit of the geothermal power plant were optimized, its energy efficiency was evaluated in subcritical and supercritical organic Rankine cycles with a low boiling secondary coolant. It is shown that the utilization of the low-potential energy of brines in heat pump plants can improve the efficiency of energy cycles in the field. The analysis shows that the creation of integrated technologies for development of high-potential mineralized geothermal resources of the field will significantly improve the economic structure of the region.