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Dynamic analysis of multifrequency 3D seismic datasets to identify potential geohazards in the Sea of Okhotskстатья
- Авторы: Pirogova A., Zamotina Z., Shuplov P., Chegodaeva A., Tokarev M.
- Сборник: 83rd EAGE Annual Conference & Exhibition
- Год издания: 2022
- Издательство: European Association of Geoscientists and Engineers
- Местоположение издательства: Netherlands
- DOI: 10.3997/2214-4609.202210197
- 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.
- Добавил в систему: Пирогова Анастасия Сергеевна