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A Fast Algorithm for 3D Focusing Inversion of Magnetic Data and Its Application in Geothermal Exploration

Author

Listed:
  • Weiming Dai

    (College of Information Engineering, Gan Dong University, Fuzhou 344000, China)

  • Hongfa Jia

    (College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China)

  • Niande Jiang

    (College of Information Engineering, Gan Dong University, Fuzhou 344000, China)

  • Yanhong Liu

    (College of Information Engineering, Gan Dong University, Fuzhou 344000, China)

  • Weihui Zhou

    (College of Information Engineering, Gan Dong University, Fuzhou 344000, China)

  • Zhiying Zhu

    (College of Information Engineering, Gan Dong University, Fuzhou 344000, China)

  • Shuai Zhou

    (College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China)

Abstract

This paper presents a fast focusing inversion algorithm of magnetic data based on the conjugate gradient method, which can be used to describe the underground target geologic body efficiently and clearly. The proposed method realizes an effect similar to matrix compression by changing the computation order, calculating the inner product of vectors and equivalent expansion of expressions. Model tests show that this strategy successfully reduces the computation time of a single iteration of the conjugate gradient method, so the three-dimensional magnetic data inversion is realized under a certain number of iterations. In this paper, the detailed calculation steps of the proposed inversion method are given, and the effectiveness and high efficiency of the proposed fast focusing inversion method are verified by three theoretical model tests and a set of measured data. Finally, the fast focus inversion algorithm is applied to the magnetic data of Gonghe Basin, Qinghai Province, to describe the spatial distribution range of deep hot dry rock, which provides a direction for the continuous exploration of geothermal resources in this area.

Suggested Citation

  • Weiming Dai & Hongfa Jia & Niande Jiang & Yanhong Liu & Weihui Zhou & Zhiying Zhu & Shuai Zhou, 2024. "A Fast Algorithm for 3D Focusing Inversion of Magnetic Data and Its Application in Geothermal Exploration," Energies, MDPI, vol. 17(16), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:16:p:4000-:d:1455190
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