Full text loading...
-
Multidimensional Processing of the Airborne EM Data in the Complex Media
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Engineering and Mining Geophysics 2018, Apr 2018, Volume 2018, p.1 - 10
Abstract
The paper proposes an approach to multidimensional geometric (parametric) inversion of the airborne EM data in the time-domain in the presence of the conductive lateral overburden inhomogenities with the significant altitude variations of the surface relief and subhorizontal surfaces between the layers of the geological medium. The solution of forward problems and calculation of the impact field of the geoelectrical model parameters are performed with the use of the finite element method. The possibilities of the proposed approach are shown on synthetic data for the multilayer geoelectrical model containing the target objects with the different geometry: a subvertical object and an object with the tube form, beneath a conductive lateral inhomogeneous overburden in the condition of the significant altitude variations of the surface relief. The geoelectrical model was constructed as a generalization on the basis of the results of the airborne EM data interpretation obtained in several areas. The results of the numerical experiments show that the proposed approach makes it possible to detect and delineate the target objects in the case of a relatively low impact from these objects to the receiving signals in comparison to other 3D-inhomogenities including the ones overlapping the target objects.