- ISSN: 2202-0586
- E-ISSN:
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oa Inversion of magnetotellurics data with enhanced structural fidelity
- Australian Society of Exploration Geophysicists
- Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 6
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- 01 Dec 2019
Abstract
The magnetotelluric method has been successfully used as a complementary tool in the exploration of foothill plays but its intrinsic non-uniqueness and its reduced structural fidelity, with respect to a seismic section, make its interpretation more complex.
Since the solution of a non-unique inverse problem is heavily dependent on its starting point, a traditional method to tackle the non-uniqueness relies on the careful definition of the starting model, used as a tool for injecting the available a-priori information into the inverse problem.
We present an alternative approach to the exploitation of the a-priori knowledge that, instead of embedding it into the starting model, relies on the continuous assimilation of the structural/geological information into the resistivity volume. The method we propose for the inversion of the MT soundings tries to maximize, simultaneously, the data-fit and the structural fidelity. We discuss the advantages deriving from the application of this technique by mean of a synthetic example representative of a foothills play.
