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Velocity Estimation by Waveform Tomography in the Canadian Foothill - A Synthetic Benchmark Study

机译:加拿大山麓波形断层扫描的速度估计 - 一种合成基准研究

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In the structurally complex Canadian foothills, conventional seismic data processing is inadequate, given the effects of steep dips, rough topography, and near-surface weathering. Depth imaging is often necessary, and an accurate estimation of the macro-velocity model is essential. Waveform Tomography (i.e., traveltime tomography followed by frequency-domain waveform inversion) of long-offset data provides a possible solution. In order to investigate this, we generated synthetic data in a geologically realistic model exhibiting fold-thrust sheets, steeply dipping structures, and topographically elevated carbonate outcrops. The method shows promise for resolving the near-surface geological structures in this environment. Real data acquired with long-offsets and low-frequency sensors may provide the necessary input for Waveform Tomography to succeed in the Canadian foothills.
机译:在结构复杂的加拿大山麓中,鉴于陡坡,粗糙地形和近表面风化的效果,常规地震数据处理不充分。 通常需要深度成像,并且精确估计宏观速度模型至关重要。 长偏移数据的波形断层扫描(即,旅行时间断层扫描后跟频率域波形反转)提供了可能的解决方案。 为了调查这一点,我们在具有折叠推力板,陡峭浸渍结构和地形升高的碳酸盐剥离的地质实际模型中产生了合成数据。 该方法显示了解决这种环境中近表面地质结构的承诺。 使用长偏移和低频传感器获取的真实数据可以为波形断层扫描提供必要的输入,以在加拿大山山上取得成功。

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