Open AccessOne-dimensional constrained inversion of electrical source transient electromagnetic method
Author(s) -
Guoru Nai,
Xuben Wang,
Zhuoliang Xie,
Xianjie Chen,
Wei Liu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/660/1/012076
Subject(s) - jacobian matrix and determinant , inversion (geology) , weighting , electromotive force , mathematics , mathematical analysis , physics , acoustics , geology , paleontology , structural basin , quantum mechanics
The damped least squares inversion principle is applied to the transient electromagnetic one-dimensional inversion of electrical sources, and a new model is obtained by continuously iterating the initial model, thereby fitting the observed transient electromagnetic response, and performing one-dimensional inversion through induced electromotive force play. In the damped least squares inversion, constraints are added to the Jacobian matrix, and simultaneous constraint equations and conventional inversion equations are solved. By weighting the constraint parameters, the difference between adjacent resistivities and layer thicknesses is minimized. Finally, K-type and H-type theoretical models were used to verify the reliability of the algorithm, and compared with the conventional transient electromagnetic damping least squares inversion.