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| | Abstract | | In recent years, three-dimensional (3D) geological models have been gaining importance in various fields. 3D geophysical surveys, which provide direct geological information, are being actively studied as they can contribute to the creation of geological models. As part of the development of 3D geophysical techniques, "3D-HD tomography" has been proposed and its usefulness has already been demonstrated. In this report, we propose a "3D seismic refraction survey with flexible geometry" that utilizes the features of 3D-HD tomography and investigate its applicability through the field experiment. In the field experiment, seismic data were acquired using receivers arranged in a dense mesh, and the results of 3D travel-time inversion using all the data were compared with the results with flexible geometry using some of the data. The results show that the inversion results with flexible geometry are as useful as it with dense mesh geometry. |
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