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Assessment of the detectability of localized strong attenuation zones through finite-difference waveform modelling

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(мая 2017)

Аннотация

Finite difference forward modelling was used to address the detectability of a local strong attenuation zone. Velocity and density structure of the model was based on the Athabasca Basin geophysical borehole log. Attenuation was represented using quality factor Q, and introduced to the model as four different configurations; no attenuation, layered attenuation, constant attenuation, and localized attenuation. An explosive source generating Ricker wavelet with dominant frequency of 60Hz, and horizontal and vertical lines of receivers were applied to the models to represent seismic surveys. Simulation results showing wave propagations and seismic traces of different models were assessed and compared.

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