To foresee the allocation of the oil-gas-chemistry companies in the territory of East Siberia and the Republic of Sakha (Yakutia) and their further development on the base of resources of the East Siberian Oil-and-gas Complex (ESOGC), the paper analyzes competitive advantages of different regions. We present the spot analysis of regional advantages and infrastractural constraints which oil-and-gas companies could face while implementing their projects. We also present the balance valuations of supply and demand for light hydrocarbons for different scenarios of the ESOGC development. We identified the corporate, regional and national priorities for allocation of the oil-gas-chemistry complexes. We assess how infrastructural constraints influence the implementation of investment projects, as well as complexity and efficiency of the hydrocarbons usage.