Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method
The transient electromagnetic (TEM) method is a widely used geophysical technique for detecting subsurface electrical structures. However, its inversion results are typically limited to resistivity parameters, making it challenging to directly infer key petrophysical properties, such as water satura...
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MDPI AG
2025-06-01
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| author | Xiaozhen Teng Jianhua Yue Kailiang Lu Danyang Xi Herui Zhang Kua Wang |
| author_facet | Xiaozhen Teng Jianhua Yue Kailiang Lu Danyang Xi Herui Zhang Kua Wang |
| author_sort | Xiaozhen Teng |
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| description | The transient electromagnetic (TEM) method is a widely used geophysical technique for detecting subsurface electrical structures. However, its inversion results are typically limited to resistivity parameters, making it challenging to directly infer key petrophysical properties, such as water saturation and porosity. This study proposes a petrophysics parameter inversion approach based on TEM data. By constructing multiple geoelectric models with varying porosities and water saturation values for numerical simulations, the results demonstrated that both the forward and inversion responses of the TEM field maintained errors within 5%. The inversion procedure begins with the reconstruction of the subsurface resistivity distribution, which reliably reflects the true geoelectric model. Based on the inverted resistivity, the water saturation and porosity parameters are subsequently estimated. The inversion results closely match the overall trend of the actual model and exhibit a clear response at the target layer. Finally, the proposed method is applied to a field test at the Tongxin Coal Mine. By integrating subsurface electrical responses with geological data, the spatial distributions of water saturation and porosity within the coal-bearing strata were delineated. This provides a scientific basis for the detailed characterization of the physical properties of coal and surrounding rock, as well as for understanding the development of pores and fractures in underground strata. |
| format | Article |
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| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
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| spelling | doaj-art-787e0b6a1d254904b68d8dbb2db92ba82025-08-20T02:32:57ZengMDPI AGApplied Sciences2076-34172025-06-011511625610.3390/app15116256Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic MethodXiaozhen Teng0Jianhua Yue1Kailiang Lu2Danyang Xi3Herui Zhang4Kua Wang5College of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, ChinaCollege of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaCollege of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Safety Engineering, China University of Mining and Technology, Xuzhou 221008, ChinaShenhua Geological Exploration Co., Beijing 102218, ChinaThe transient electromagnetic (TEM) method is a widely used geophysical technique for detecting subsurface electrical structures. However, its inversion results are typically limited to resistivity parameters, making it challenging to directly infer key petrophysical properties, such as water saturation and porosity. This study proposes a petrophysics parameter inversion approach based on TEM data. By constructing multiple geoelectric models with varying porosities and water saturation values for numerical simulations, the results demonstrated that both the forward and inversion responses of the TEM field maintained errors within 5%. The inversion procedure begins with the reconstruction of the subsurface resistivity distribution, which reliably reflects the true geoelectric model. Based on the inverted resistivity, the water saturation and porosity parameters are subsequently estimated. The inversion results closely match the overall trend of the actual model and exhibit a clear response at the target layer. Finally, the proposed method is applied to a field test at the Tongxin Coal Mine. By integrating subsurface electrical responses with geological data, the spatial distributions of water saturation and porosity within the coal-bearing strata were delineated. This provides a scientific basis for the detailed characterization of the physical properties of coal and surrounding rock, as well as for understanding the development of pores and fractures in underground strata.https://www.mdpi.com/2076-3417/15/11/6256transient electromagnetic method (TEM)forward modelinginversion algorithmpetrophysics parameter |
| spellingShingle | Xiaozhen Teng Jianhua Yue Kailiang Lu Danyang Xi Herui Zhang Kua Wang Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method Applied Sciences transient electromagnetic method (TEM) forward modeling inversion algorithm petrophysics parameter |
| title | Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method |
| title_full | Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method |
| title_fullStr | Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method |
| title_full_unstemmed | Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method |
| title_short | Petrophysics Parameter Inversion and Its Application Based on the Transient Electromagnetic Method |
| title_sort | petrophysics parameter inversion and its application based on the transient electromagnetic method |
| topic | transient electromagnetic method (TEM) forward modeling inversion algorithm petrophysics parameter |
| url | https://www.mdpi.com/2076-3417/15/11/6256 |
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