Experimental investigation of Krauklis wave-propagation velocity in trilayer using dynamic photoelasticity

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Department of Geological and Mining Engineering and Sciences


We developed a photoelasticity optical apparatus to investigate the Krauklis wave propagation in a fluid-filled fracture. In our experiment, we modeled a fluid-filled fracture by transparent photoelastic sensitive polycarbonate and unsensitive acrylic plates. Using a high-speed camera and linear polarized light, we visualized propagation of the Krauklis wave. We processed and analyzed the high-speed camera data using the pixel method to estimate the group velocity of the Krauklis wave. We noted that the group velocity of the Krauklis wave is much lower than that of the fluid or fracture matrix. This observation is consistent with the theoretical expressions on the Krauklis velocity at low frequencies. In addition, we observed high attenuation of the Krauklis wave in the fracture.

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SEG Technical Program Expanded Abstracts 2018