Details of the Abstract
| Title of paper | Detectability of deep conductive anomaly for geothermal exploration by 3D FEM and FDM inversions of MT data |
| List of authors | Uchida, T., Yamaya, Y. |
| Affiliation(s) | National Institute of Advanced Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology |
| Summary | We performed numerical experiments to investigate how accurately we can detect a deep conductive anomaly which is overlain by another shallow conductive layer. Baring in mind the exploration of geothermal reservoirs, real topography data from a field survey was considered in the experiment. We utilized two three-dimensional magnetotelluric inversion codes; FEMTIC (finite element modeling; FEM) and WSINV3DMT (finite difference modeling; FDM). For FEMTIC, we also tested the inclusion of phase tensor as observed data. Inversion experiments revealed the following; 1) the FEM inversion can almost properly recover both the shallow and deep conductive anomalies with the inversion of impedance and tipper data, 2) Inclusion of phase tensor data, instead of the impedance data, may lose the detectability of the deep conductor, and 3) the FDM inversion is not accurate to recover the deep conductive anomaly when we include rough topography variation. |
| Session Keyword | 3.0 EM methods for exploration (geothermal, mineral resources, etc.) |
| File upload |
3.0_detectability_of_deep_con_uchida_03.pdf
|