Details of the Abstract
| Title of paper | 3D multiscale inversion of airborne electromagnetic data |
| List of authors | Author, Yang Su, Co-author, Changchun Yin, Libao Wang, Yunhe Liu, Bo Zhang, Xiuyan Ren, and Jun Li. |
| Affiliation(s) |
College of Geoexploration Science and Technology, Jilin University, College of Geoexploration Science and Technology, Jilin University, Shandong Huichuang Technology Co., Ltd, College of Geoexploration Science and Technology, Jilin University, College of Geoexploration Science and Technology, Jilin University, College of Geoexploration Science and Technology, Jilin University, College of Geoexploration Science and Technology, Jilin University. |
| Summary | Airborne electromagnetic (AEM) technology is an efficient geophysical exploration tool for investigating subsurface resistivity structures. To alleviate the problems with the resolution and computational efficiency for three-dimensional (3D) AEM inversion, we establish a relationship between coarse and fine grids in the inversion process based on shearlet transform, and propose a 3D multi-scale (MS) shearlet-based regularization inversion algorithm. The shearlet-based regularization inversion can effectively recover the anisotropic structure of anomalous bodies such as curved boundaries, and thus can significantly improve the resolution of the inversion results. In the initial stage of inversion, the coarse grid and sparse data points are used to recover the main structure of the subsurface. After the inversion reaches a certain level, the result from the coarse-grid inversion is used as coarse-scale model for shearlet structures in fine grids. After that, we continue to use fine grids and dense data points for our inversion, so that we can finally obtain the high-resolution inversions on the fine grids. This inversion method from coarse to fine grids can effectively reduce calculation time while ensuring high-resolution of inversions. We demonstrate the effectiveness and practicality of 3D MS inversion algorithm by using a synthetic example. The numerical experiments show that our MS method can effectively reduce the computational time without reducing resolution in AEM inversions. |
| Session Keyword | 6.0 Marine and airbone EM |
| File upload |
6.0_3d_multiscale_inversion_o_su.pdf
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