Аннотация:The offshore development in such a complex region as the Far East requires effective technologies of the near-surface geohazards evaluation and prediction of the drilling risks. We present a methodology of dynamic analysis of three-dimensional (3D) reflection seismic data obtained in multiple frequency ranges, 5–110 Hz (standard seismic survey), 70–500 Hz (high-resolution seismic survey) and 250–1200 Hz (very-high-resolution seismic survey), that focuses on the study of the near-surface geohazards. The methodology includes analysis of amplitude attributes, AVO-modelling, estimation of AVO attributes, estimation of Q-factors and amplitude pre-stack inversion. Its application to the unique broadband seismic dataset allowed us to assess the elastic properties of the near-surface sediments and evaluate the potential geohazards including the intervals of the increased gas saturation at the research area in the Sea of Okhotsk.