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The first marine ice-resistant stationary platform Pil’tun-Astokhskaya-A (MISP PA-A) was installed on the northeast shelf of Sakhalin Island more than 20 years ago. Currently, five MISPs (PA-A, PA-B, LUN-A, Orlan and Berkut) operate in the coastal waters and plans are being actively discussed to develop new hydrocarbon deposits. The duration of the ice period in this region of the Sea of Okhotsk varies from 181 to 197 days, and the issue of actions plans for the elimination and mitigation of possible large-scale oil spills in the ice period are of particular relevance. This paper presents the results of the study of the conditions for the formation of open water spaces (OWS) in the ice cover (IC) behind the MISP obtained from aeronautical, shipbased and satellite observations, as well as practical experience in ice management in the framework of the Sakhalin-2 project in 1999–2008. The peculiarities of OWS formation can be refined for significant increasing of response on the oil pollution in the presence of the IC, for example, by eliminating oil in the wake formed by ice drift after the MISP and therefore reduce the load on the marine environment. The proposed methodological approach of artificially created OWS can be implemented in the waters of the freezing and Arctic seas that wash the shores of Russia, where the development of offshore hydrocarbon deposits is underway. At the same time, special attention for each particular MISP should be given to taking into account local ice conditions when developing safety issues for conducting such marine operations (this issue should be the subject of a separate study).

ANALYSIS OF THE CONDITIONS IN THE FORMATION OF OPEN WATER SPACES BEHIND OFFSHORE PLATFORMS FOR THE ELIMINATION OF OIL SPILLS