Open AccessAnalysis of IP response characteristics in wells on undulating topography
Author(s) -
Xinyu Wang,
Yan Liu,
Yurong Mao,
Lei Zhou,
Xuan Xie
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 - 10.1088/1755-1315/660/1/012099
Subject(s) - electrical resistivity and conductivity , induced polarization , polarizability , borehole , polarization (electrochemistry) , geology , electrode , finite element method , conductivity , materials science , geotechnical engineering , physics , chemistry , quantum mechanics , molecule , thermodynamics
This paper studies the effect of undulating topography on resistivity method and induced polarization (IP) method between the wells. The 3D forward modeling of borehole resistivity/induced polarization method is realized by abnormal potential algorithm based on unstructured finite-element method (FEM). The algorithm is verified in layered medium and spherical abnormal bodies. We studied the response characteristics of apparent resistivity and apparent polarizability in well-well mode and the situation when the source is at different positions in the well, and analyzed the effects of undulating topography on resistivity and induced polarization. The results show that the apparent polarizability and apparent resistivity response have a great relationship with the depth of the emission source in the well, the relative position of the emission source and the measurement electrode. The undulating topography only affects the measuring electrodes at a short distance, and it has a greater impact on the low-resistance anomalous body.