Exploration Geophysics Exploration Geophysics Society
Journal of the Australian Society of Exploration Geophysicists
RESEARCH ARTICLE

Synthetic modelling and analysis of CSEM full-field apparent resistivity response combining EM induction and IP effect for 1D medium

Weiqiang Liu 1 Pinrong Lin 1 2 Qingtian Lü 1 Yong Li 1 Jianhua Li 1
+ Author Affiliations
- Author Affiliations

1 Chinese Academy of Geological Sciences, Institute of Geophysical and Geochemical Exploration and Laboratory of Geophysical EM Probing Technologies, Ministry of Land and Resources, Langfang, Hebei 065000, China.

2 Corresponding author. Email: linpinrong@126.com

Exploration Geophysics - https://doi.org/10.1071/EG17049
Submitted: 7 May 2017  Accepted: 22 September 2017   Published online: 9 November 2017

Abstract

In order to reduce the distortion of Cagniard apparent resistivity in near-field and transition-field in controlled source electromagnetic method (CSEM) and analyse the influence of induced polarisation (IP) effect on sounding curve, the full-field apparent resistivity responses combining electromagnetic (EM) induction and IP effect for 1D medium were modelled. Complex resistivity of the rocks and ore were calculated using the Cole–Cole model, and this complex resistivity was used to replace the real resistivity without IP effect in CSEM forward modelling. Additionally, full-field apparent resistivity was calculated using electric field component by Newton iterative algorithm, which is suitable for the whole field zone. Sounding curves of full-field apparent resistivity and Cagniard apparent resistivity were compared. Full-field apparent resistivity responses with and without IP effect were analysed. Influence of varying time constant and frequency dependent coefficient on the responses, influence of noise levels on the responses and influence of the IP effect on the inversion were also evaluated. The results show that the distortions in near-field and transition-field are removed in full-field apparent resistivity sounding curves. The IP effect has a significant impact on full-field apparent resistivity response. For multi-layer medium, the influence of the IP effect on the sounding curve is dependent of the burial depth of polarisation layer and the curve type of layered medium. The influence of chargeability is greater than that of other two parameters, time constant and frequency dependent coefficient. Resistivity and thickness of the layered model were distorted seriously by using the inversion algorithm ignoring IP effect.

Key words: apparent resistivity, controlled source electromagnetic method (CSEM), forward modelling, induced polarisation, layered medium.


References

Asten, M. W., Vicary, M., Rutter, H., and Cull, J. P., 2005, An all-frequency resistivity-depth and static-correction technique for CSAMT data, with applications to mineralised targets under glacial cover (Western Tasmania) and basalt cover (Victorian goldfields): Exploration Geophysics, 36, 287–293
An all-frequency resistivity-depth and static-correction technique for CSAMT data, with applications to mineralised targets under glacial cover (Western Tasmania) and basalt cover (Victorian goldfields):CrossRef |

Basokur, A. T., Rasmussen, T. M., Kaya, C., Altun, Y., and Aktas, K., 1997, Comparison of induced polarization and controlled-source audio-magnetotellurics methods for massive chalcopyrite exploration in a volcanic area: Geophysics, 62, 1087–1096
Comparison of induced polarization and controlled-source audio-magnetotellurics methods for massive chalcopyrite exploration in a volcanic area:CrossRef |

Boschetto, N. B., and Hohmann, G. W., 1991, Controlled-source audiofrequency magnetotelluric responses of three-dimensional bodies: Geophysics, 56, 255–264
Controlled-source audiofrequency magnetotelluric responses of three-dimensional bodies:CrossRef |

Cagniard, L., 1953, Basic theory of the magneto-telluric method of geophysical prospecting: Geophysics, 18, 605–635
Basic theory of the magneto-telluric method of geophysical prospecting:CrossRef |

Cole, K. S., and Cole, R. H., 1941, Dispersion and absorption in dielectrics – I. Alternating current characteristics: The Journal of Chemical Physics, 9, 341–351
Dispersion and absorption in dielectrics – I. Alternating current characteristics:CrossRef | 1:CAS:528:DyaH3MXit1Sktw%3D%3D&md5=0ea43dc80f9fc99321eb6472d8bf5a00CAS |

Commer, M., Newman, G. A., Williams, K. H., and Hubbard, S. S., 2011, 3D induced-polarization data inversion for complex resistivity: Geophysics, 76, F157–F171
3D induced-polarization data inversion for complex resistivity:CrossRef |

Commer, M., Petrov, P. V., and Newman, G. A., 2017, FDTD modeling of induced polarization phenomena in transient electromagnetics: Geophysical Journal International, 209, 387–405
FDTD modeling of induced polarization phenomena in transient electromagnetics:CrossRef |

Dey, A., and Morrison, H. F., 1973, Electromagnetic coupling in frequency and time-domain induced-polarization surveys over a multilayered earth: Geophysics, 38, 380–405
Electromagnetic coupling in frequency and time-domain induced-polarization surveys over a multilayered earth:CrossRef |

Flis, M. F., Newman, G. A., and Hohmann, G. W., 1989, Induced-polarization effects in time-domain electromagnetic measurements: Geophysics, 54, 514–523
Induced-polarization effects in time-domain electromagnetic measurements:CrossRef |

Fullagar, P. K., Zhou, B., and Bourne, B., 2000, EM-coupling removal from time-domain IP data: Exploration Geophysics, 31, 134–139
EM-coupling removal from time-domain IP data:CrossRef |

Gasperikova, E., and Morrison, H. F., 2001, Mapping of induced polarization using natural fields: Geophysics, 66, 137–147
Mapping of induced polarization using natural fields:CrossRef |

Goldstein, M. A., and Strangway, D. W., 1975, Audio-frequency magnetotellurics with a grounded electric dipole source: Geophysics, 40, 669–683
Audio-frequency magnetotellurics with a grounded electric dipole source:CrossRef |

Grant, T. W., and Hohmann, G. W., 1989, Interpretation and removal of EM coupling in IP data: Exploration Geophysics, 20, 105–110
Interpretation and removal of EM coupling in IP data:CrossRef |

He, J. S., 2015, Wide field electromagnetic methods: SEG Technical Program, Expanded Abstracts, 1006–1011.

He, J. S., Yang, Y., Li, D. Q., and Weng, J. B., 2015, Wide field electromagnetic sounding methods: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2015), EEGS, Expanded Abstracts, 325–329.

Hu, Y. C., Li, T. L., Fan, C. S., Wang, D. Y., and Li, J. P., 2015, Three-dimensional tensor controlled-source electromagnetic modeling based on the vector finite-element method: Applied Geophysics, 12, 35–46
Three-dimensional tensor controlled-source electromagnetic modeling based on the vector finite-element method:CrossRef |

Kaminski, V., and Viezzoli, A., 2017, Modelling induced polarization effects in helicopter time-domain electromagnetic data: field case studies: Geophysics, 82, B49–B61
Modelling induced polarization effects in helicopter time-domain electromagnetic data: field case studies:CrossRef |

Kang, S., Oldenburg, D. W., and McMillan, M. S., 2015, 3D IP inversion of airborne EM data at Tli Kwi Cho: ASEG Extended Abstracts, 1–4.

Key, K., 2012, Is the fast Hankel transform faster than quadrature: Geophysics, 77, F21–F30
Is the fast Hankel transform faster than quadrature:CrossRef |

Lei, D., Wu, X. P., Di, Q. Y., Wang, G., Lv, X. R., Wang, R., Yang, J., and Yue, M. X., 2016, Modeling and analysis of CSAMT field source effect and its characteristics: Journal of Geophysics and Engineering, 13, 49–58
Modeling and analysis of CSAMT field source effect and its characteristics:CrossRef |

Li, Y., Lin, P. R., Xiao, Y., and Wang, Y. X., 2011, Induced polarization effect on frequency-domain electromagnetic sounding with electric dipole source: Chinese Journal of Geophysics, 54, 1935–1944
Induced polarization effect on frequency-domain electromagnetic sounding with electric dipole source:CrossRef |

Liu, W. Q., Chen, R. J., Wu, H., Qiu, J. T., Yao, H. C., Shen, R. J., and Zeng, P., 2015, High precision FDIP exploration in productive mine with strong EM interference: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2015), EEGS, Expanded Abstracts, 65–73.

Liu, W. Q., Chen, R. J., Cai, H. Z., and Luo, W. B., 2016, Robust statistical methods for impulse noise suppressing of spread spectrum induced polarization data, with application to a mine site, Gansu province, China: Journal of Applied Geophysics, 135, 397–407
Robust statistical methods for impulse noise suppressing of spread spectrum induced polarization data, with application to a mine site, Gansu province, China:CrossRef |

Lockwood, A., 2001, Recovering IP information from broadband EM measurements: ASEG Extended Abstracts, 1–4.

Luo, Y., and Zhang, G., 1998, Theory and application of spectral induced polarization: SEG.

Macnae, J., Lay, L., and Weston, L., 1998, Measurement of static shift in MT and CSAMT surveys: Exploration Geophysics, 29, 494–498
Measurement of static shift in MT and CSAMT surveys:CrossRef |

Mustopa, E. J., Srigutomo, W., Sutarno, D., and Fauzi, U., 2016, Resistivtiy structure in Kamojang geothermal field derived from CSAMT data: Indonesian Journal of Physics, 22, 23–29

Pelton, W. H., Ward, S. H., Hallof, P. G., Sill, W. R., and Nelson, P. H., 1978, Mineral discrimination and removal of inductive coupling with multi-frequency IP: Geophysics, 43, 588–609
Mineral discrimination and removal of inductive coupling with multi-frequency IP:CrossRef |

Revil, A., Florsch, N., and Mao, D., 2015, Induced polarization response of porous media with metallic particles — part 1: a theory for disseminated semiconductors: Geophysics, 80, D525–D538
Induced polarization response of porous media with metallic particles — part 1: a theory for disseminated semiconductors:CrossRef |

Routh, P. S., and Oldenburg, D. W., 1999, Inversion of controlled source audio-frequency magnetotellurics data for a horizontally layered earth: Geophysics, 64, 1689–1697
Inversion of controlled source audio-frequency magnetotellurics data for a horizontally layered earth:CrossRef |

Sandberg, S. K., and Hohmann, G. W., 1982, Controlled-source audiomagnetotellurics in geothermal exploration: Geophysics, 47, 100–116
Controlled-source audiomagnetotellurics in geothermal exploration:CrossRef |

Sasaki, Y., Yoneda, Y., and Matsuo, K., 1992, Resistivity imaging of controlled-source audiofrequency magnetotelluric data: Geophysics, 57, 952–955
Resistivity imaging of controlled-source audiofrequency magnetotelluric data:CrossRef |

Shlykov, A. A., and Saraev, A. K., 2014, Wave effects in the field of a high-frequency horizontal electric dipole: Izvestiya: Physics of the Solid Earth, 50, 249–262

Sutarno, D., and Fatrio, I., 2016, Robust M-estimation of CSAMT impedance functions: Indonesian Journal of Physics, 18, 81–85

Tang, J. T., and He, J. S., 1994, A new method to define the full-zone resistivity in horizontal electric dipole frequency soundings on a layered earth: Chinese Journal of Geophysics, 4, 543–552

van Reed, E., MacInnes, S., and Smith, M., 1989, Case histories and modelling interpretation in CSAMT: Exploration Geophysics, 20, 121–121
Case histories and modelling interpretation in CSAMT:CrossRef |

Viezzoli, A., and Kaminski, V., 2016, Airborne IP: examples from the Mount Milligan deposit, Canada, and the Amakinskaya kimberlite pipe, Russia: Exploration Geophysics, 47, 269–278

Wait, J. R., 1959, The variable-frequency method, in J. R. Wait, ed., Overvoltage research and geophysical applications: Pergamon 29–49.

Xi, X. L., Yang, H. C., He, L. F., and Chen, R. J., 2013, Chromite mapping using induced polarization method based on spread spectrum technology: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2013), EEGS, Expanded Abstracts, 13–19.

Xi, X. L., Yang, H. C., Zhao, X. F., Yao, H. C., Qiu, J. T., Shen, R. J., and Chen, R. J., 2014, Large-scale distributed 2D/3D FDIP system based on ZigBee network and GPS: Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2014), EEGS, Expanded Abstracts, 130–139.

Yue, A. P., Di, Q. Y., Wand, M. Y., and Shi, K. F., 2009, 1‐D forward modeling of the CSAMT signal incorporation IP effect: Chinese Journal of Geophysics, 52, 881–891
1‐D forward modeling of the CSAMT signal incorporation IP effect:CrossRef |

Zhang, Y. Y., Li, X., Yao, W. H., Zhi, Q. Q., and Li, J., 2015, Multi component full field apparent resistivity definition of multi-source ground-airborne transient electromagnetic method with galvanic sources: Chinese Journal of Geophysics, 58, 2745–2758

Zhdanov, M., 2008, Generalized effective-medium theory of induced polarization: Geophysics, 73, F197–F211
Generalized effective-medium theory of induced polarization:CrossRef |

Zonge, K. L., and Wynn, J. C., 1975, Recent advances and applications in complex resistivity measurements: Geophysics, 40, 851–864
Recent advances and applications in complex resistivity measurements:CrossRef |



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