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High Resolution Time-frequency Distribution. Automatic First-break Picking and Determination of Seismic Events Traveltime
В наличии
Местонахождение: Алматы | Состояние экземпляра: новый |
Бумажная
версия
версия
Автор: Mohammad Bejvani
ISBN: 9786202079945
Год издания: 2017
Формат книги: 60×90/16 (145×215 мм)
Количество страниц: 76
Издательство: LAP LAMBERT Academic Publishing
Цена: 21841 тг
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Аннотация: This literature describes concepts and results related to application of time-frequency analysis for automatic detection of traveltime of seismic signals. Firstly, short-time Fourier transform is introduced as one of time-frequency methods, that has more capability than Fourier transform and gives us sensible feature of signal. Optimal window-length computing methods, such as optimization method and chirp rate method in order to enhancing resolution, have been investigated, analytically. Output results and their comparisons endorse e?ective role of window-length as an important parameter. Like automated first-break picking methods that use instantaneous attributes, we utilize short-time Fourier transform in order to extraction of a local attribute for automatic picking of arrival time. Furthermore, using this tool, we can calculate instantaneous traveltime that help us to identify seismic events in a trace. This procedure leads to detection of reflectors and seismic horizons in the prestack and poststack seismic gathers and sections.
Ключевые слова: STFT, analysis, attributes, automatic, Break, Events, first, frequency, seismic, Short, time, transform, traveltime, Time Fourier, instantaneous, picking