Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium
In the fields of resource exploration and development， as well as geological disaster prevention and control， the electromagnetic method of borehole is an effective tool for monitoring subsurface fluid distribution， particularly in evaluating the effectiveness of hydraulic fracturing and grouting fo...
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| Language: | zho |
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Academic Publishing Center of HPU
2025-03-01
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| Series: | 河南理工大学学报. 自然科学版 |
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| Online Access: | http://xuebao.hpu.edu.cn/info/11197/96079.htm |
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| author | ZHAO Ning ZHANG Zhaoaoji JIANG Liming XIAO Zhanshan HU Haitao |
| author_facet | ZHAO Ning ZHANG Zhaoaoji JIANG Liming XIAO Zhanshan HU Haitao |
| author_sort | ZHAO Ning |
| collection | DOAJ |
| description | In the fields of resource exploration and development， as well as geological disaster prevention and control， the electromagnetic method of borehole is an effective tool for monitoring subsurface fluid distribution， particularly in evaluating the effectiveness of hydraulic fracturing and grouting for water control. Transient electromagnetic remote detection fills the gap in geological assessment scale of conventional logging and seismic exploration in terms of detection depth and resolution. However，the current theoretical models based on isotropic media do not fully correspond to the actual development environment of most oil and gas fields in China， which is the fact of heterogeneous and anisotropic formations.ObjectivesConsidering the complexity and heterogeneity of subsurface media， it is of great significance to study borehole transient electromagnetic method in anisotropic formations.MethodsBased on borehole transient electromagnetic theory， the relationship between apparent resistivity and apparent dip angle of anisotropic formation borehole is derived through analytical calculation by studying the three component induction data.ResultsThe results indicate that for isotropic media models， the apparent resistivity and apparent dip angle effectively can better reflect the formation resistivity and dip angle within the model. For anisotropic models with transversely isotropic media with a vertical symmetry axis （VTI）， the apparent resistivity and apparent dip angle similarly can better reflect the horizontal and vertical resistivity and dip angle of the anisotropic formations.ConclusionsThe results enable rapid calculation of apparent resistivity and apparent dip angle in anisotropic formations， facilitating quick analysis of the electrical structure near the observation device and significantly contributing to the rapid development of borehole transient electromagnetics in anisotropic media. |
| format | Article |
| id | doaj-art-fac80ea896cb484da9dec5fffd3467ca |
| institution | OA Journals |
| issn | 1673-9787 |
| language | zho |
| publishDate | 2025-03-01 |
| publisher | Academic Publishing Center of HPU |
| record_format | Article |
| series | 河南理工大学学报. 自然科学版 |
| spelling | doaj-art-fac80ea896cb484da9dec5fffd3467ca2025-08-20T02:16:19ZzhoAcademic Publishing Center of HPU河南理工大学学报. 自然科学版1673-97872025-03-01442818910.16186/j.cnki.1673-9787.20230200131673-9787（2025）2-81-9Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic mediumZHAO Ning0ZHANG Zhaoaoji1JIANG Liming2XIAO Zhanshan3HU Haitao4School of Physics & Electronic Information Engineering， Henan Polytechnic University， Jiaozuo 454000， Henan， ChinaSchool of Physics & Electronic Information Engineering， Henan Polytechnic University， Jiaozuo 454000， Henan， ChinaWell Logging Key Laboratory， China National Petroleum Corporation， Xi’an 710077， Shaanxi， ChinaWell Logging Key Laboratory， China National Petroleum Corporation， Xi’an 710077， Shaanxi， ChinaWell Logging Key Laboratory， China National Petroleum Corporation， Xi’an 710077， Shaanxi， ChinaIn the fields of resource exploration and development， as well as geological disaster prevention and control， the electromagnetic method of borehole is an effective tool for monitoring subsurface fluid distribution， particularly in evaluating the effectiveness of hydraulic fracturing and grouting for water control. Transient electromagnetic remote detection fills the gap in geological assessment scale of conventional logging and seismic exploration in terms of detection depth and resolution. However，the current theoretical models based on isotropic media do not fully correspond to the actual development environment of most oil and gas fields in China， which is the fact of heterogeneous and anisotropic formations.ObjectivesConsidering the complexity and heterogeneity of subsurface media， it is of great significance to study borehole transient electromagnetic method in anisotropic formations.MethodsBased on borehole transient electromagnetic theory， the relationship between apparent resistivity and apparent dip angle of anisotropic formation borehole is derived through analytical calculation by studying the three component induction data.ResultsThe results indicate that for isotropic media models， the apparent resistivity and apparent dip angle effectively can better reflect the formation resistivity and dip angle within the model. For anisotropic models with transversely isotropic media with a vertical symmetry axis （VTI）， the apparent resistivity and apparent dip angle similarly can better reflect the horizontal and vertical resistivity and dip angle of the anisotropic formations.ConclusionsThe results enable rapid calculation of apparent resistivity and apparent dip angle in anisotropic formations， facilitating quick analysis of the electrical structure near the observation device and significantly contributing to the rapid development of borehole transient electromagnetics in anisotropic media.http://xuebao.hpu.edu.cn/info/11197/96079.htmborehole transient electromagnetic methodanisotropyapparent resistivityapparent dip |
| spellingShingle | ZHAO Ning ZHANG Zhaoaoji JIANG Liming XIAO Zhanshan HU Haitao Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium 河南理工大学学报. 自然科学版 borehole transient electromagnetic method anisotropy apparent resistivity apparent dip |
| title | Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| title_full | Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| title_fullStr | Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| title_full_unstemmed | Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| title_short | Calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| title_sort | calculation of borehole transient electromagnetic apparent resistivity and dip in anisotropic medium |
| topic | borehole transient electromagnetic method anisotropy apparent resistivity apparent dip |
| url | http://xuebao.hpu.edu.cn/info/11197/96079.htm |
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