Comparing the effectiveness of CSEM, CSAMT, and DC methods on a 3D model of gold deposit

M. Malovichko, A. V. Tarasov, N. Yavich, M. S. Zhdanov

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    1 Citation (Scopus)

    Abstract

    In this paper, we evaluate effectiveness of the multi-frequency multi-offset controlled-source electromagnetic method (CSEM) for mineral exploration and compare it with the conventional controlled-source audiomagnetotelluric (CSAMT) and direct-current (DC) methods. To conduct this study, we have developed three-dimensional inversion code, based on a finite-difference forward solver with the contraction-operator preconditioner, leveraged with OpenMP/MPI parallelization. A detailed three-dimensional conductivity model of shale-hosted Sukhoi Log gold deposit has been created based on the results of the extensive drilling program. For each method, we performed 3D inversion of synthetic data. Our results suggest that, the use of a dense 3D CSEM data increases the quality of model reconstruction, comparing to the DC and, especially, CSAMT methods. In our example, the improvement of the CSEM method over a conventional DC method may be not enough to justify the substantially higher cost of the CSEM survey and computational resources; however, in a less resistive environment this observation may change. The overall conclusion is that, a properly designed electromagnetic survey together with the modern three-dimensional inversion could provide detailed information about the structure of a mineral deposit.

    Original languageEnglish
    Title of host publication81st EAGE Conference and Exhibition 2019
    PublisherEAGE Publishing BV
    ISBN (Electronic)9789462822894
    DOIs
    Publication statusPublished - 3 Jun 2019
    Event81st EAGE Conference and Exhibition 2019 - London, United Kingdom
    Duration: 3 Jun 20196 Jun 2019

    Publication series

    Name81st EAGE Conference and Exhibition 2019

    Conference

    Conference81st EAGE Conference and Exhibition 2019
    Country/TerritoryUnited Kingdom
    CityLondon
    Period3/06/196/06/19

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