The article is devoted to the assessment of geological risks in prospecting and exploration of hydrocarbon deposits. Increasing the efficiency of geological exploration at different stages is associated with the improvement of accounting methods and minimization of geological risks. This requires the analysis of hydrocarbon systems and their elements - source rocks, reservoir rocks, seal rocks, traps, as well as dynamic processes - generation, migration and accumulation of hydrocarbons. In the article, the methodology for assessing geological risks has been tested for geological prospecting in the water area of the north-eastern part of the Sakhalin shelf. To assess the risk models for the regional model of the structure and evolution of the Cenozoic cover of the north-eastern part of the In-Sakhalin shelf 80 regional three-dimensional models were created and analyzed, and for Kirinsky, Ayashsky and East Odoptu sections - 50 risk models. Tornado diagrams were used to evaluate and analyze the results of risk modeling. In order to assess the risks by the Chevron method, geological risk maps were plotted on the license area of the Sakhalin shelf and a scheme for the distribution of perspective objects identified by interpretation of seismic data, determining the quality of reservoirs and spreading the fluid-bearing strata. According to the results of modeling, six large independent centers of oil and gas generation are distinguished: Chayvinsky, Veninsky, Kirinsky, Pogranichny, Piltun-Astakhovsky, Deriuginsky. To build the final maps of geological risks on license areas of the Sakhalin shelf and assign risk coefficients to perspective objects, models and schemes of hydrocarbon systems were used. The results of the analysis showed that all design wells have low risks.
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