Numerical modelling is a useful tool in the understanding of the important role of fractures in reservoirs and their effects on seismic wave propagation. In this paper, we systematically investigate the effects of fracture scale and fracture orientation on the seismic response, especially with a realistic reflection seismic geometry widely used in seismic exploration. When fractures are smaller than the wavelength, they act as single scatters and generate secondary wavefields. When the size approaches the wavelength they act as individual interfaces and the wavefield is more complicated. In addition, different fracture orientations have significantly difference effects on seismic wavefield, and vertical fractures show the strongest effect on wave propagation.
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