![]() Different methods have thus been developed to improve seismic modeling in complex geological environments with structural complexities like faults with steep dips or curved reflectors. However, difficulties arise for complex geological structures with large and rapid structural changes, and conventional methods may then fail to simulate realistic wavefields due to the presence of shadow zones, diffractions and/or edge effects. In models with simple structures and slowly varying material properties, conventional methods (e.g., ray methods, finite-difference methods) are efficient. The results indicate a good quantitative fit in terms of time arrivals and acceptable fit in amplitudes for all datasets.Īccurate simulation of seismic wave propagation in complex geological structures is widely used for environmental and industrial applications for subsurface structure evaluation and in seismic exploration as a core tool of seismic imaging and inversion methods (Robertsson et al. We thus present a comparison of laboratory-scaled measurements of 3D zero-offset wave reflection of broadband pulses from a strong topographic environment immersed in a water tank with numerical data simulated by means of a spectral-element method and a discretized Kirchhoff integral method. In contrast with numerical experiments, laboratory data possess many of the characteristics of field data, as real waves propagate through models with no numerical approximations. ![]() An alternative approach for seismics consists in comparing the synthetic data with high-quality data collected in laboratory experiments under controlled conditions for a known configuration. Such approaches have limitations, especially if the propagation occurs in a complex environment with strong-contrast reflectors and surface irregularities, as it can be difficult to determine the method which gives the best approximation of the “real” solution, or to interpret the results obtained without an a priori knowledge of the geologic environment. Different methods, developed to improve seismic modeling, are typically tested on synthetic configurations against analytical solutions for simple canonical problems or reference methods, or via direct comparison with real data acquired in situ. However conventional methods may fail to simulate realistic wavefields in environments with great and rapid structural changes, due for instance to the presence of shadow zones, diffractions and/or edge effects. Accurate simulation of seismic wave propagation in complex geological structures is of particular interest nowadays.
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