Identification of Geological Hazards in the Coastal Part of the Northeastern Shelf of Sakhalin Island

The presence of geological hazards on the Sakhalin shelf creates difficulties in the design, construction, and maintenance of offshore oil and gas facilities. Identification and assessment of geological hazards in the coastal area of the northeastern shelf of Sakhalin Island will allow avoiding environmental disasters, minimizing the risks of accidents, and developing recommendations for ensuring safety in the development of oil and gas fields. The paper presents the results of an analysis of data from expeditionary surveys carried out at two sites using geophysical surveys and bathymetric surveys. The zones of ice gouging in the coastal part of site no. 1 caused by gouging of the seabed by stamukhas have been identified. Gas zones and paleo-incisions were found and mapped in the bottom part of the section at site no. 2.