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| | Abstract | | To model elastic properties of heterogeneous rock samples, we apply segmentation less digital rock physics for heterogeneous rock samples acquired from the footwall of Nobeoka thrust, Kyushu Island. By using a micro-CT scanner, we obtained 3D digital rock models with a resolution of 41 micrometer. In the segmentation less method, we obtain 3D elastic moduli by applying effective medium theory to each pixel. For the 3D elastic digital rock models, we estimated effective P- and S-wave velocities by applying dynamic wave propagation simulation using the finite difference method. When we applied the differential effective medium as the effective medium theory to each pixel, the resulting P- and S-wave velocities were well consistent with the results from laboratory measurements. Our results indicate that the segmentation less digital rock physics could be used to model heterogeneous rocks which are difficult to model with conventional rock physics theory. |
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