Joint Euler deconvolution for depth estimation of potential field magnetic and gravity data

Document Type : Research Paper

Authors

1 Institute of Geophysics, University of Tehran, Iran.

2 Department of Mining Engineering, University of Tehran.

3 Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran.

10.22059/ijmge.2023.363558.595090

Abstract

Euler deconvolution system is a well-known approach to estimate the depth of underground sources in potential field geophysics. Over-determined Euler linear equations are usually solved independently and separately for the gravity and magnetic data, and each result is an estimate for the depth of the potential sources. This technique is widely utilized to analyze individually the depth variations of magnetic and gravity sources. However, depth estimation of each of the mentioned potential fields may return specific and exclusive results regarding the complex nature of the subsurface structures, and the gravity and magnetic separate depth estimation solutions may be discordant in many aspects. In cases of low resolution for gravity and magnetic data sets, this study indicates that independently solved Euler depth estimation systems cannot yield reliable and accurate solutions of potential field sources. Combining the gravity and magnetic data and simultaneously solving the Euler equations for gravity and magnetic potential fields, this research presents a novel approach called the joint Euler method with a proper capability to return more accurate and improved depth estimations for boundary and body of potential field sources. The presented method was solved and examined over homogeneous and non-homogeneous synthetic scenarios with reduced resolution, and the depth solutions were also compared with the separate approach. After obtaining the desired results from the synthetic models, the joint Euler technique was applied to the gravity and magnetic data of the Kifl oil trap located in Iraq. The results were quite promising rather than the separate depth estimations, proving the sufficiency and applicability of the proposed potential field method in terms of interpretational aspects.

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References

[1] Thompson DT (1982) EULDPH: A new technique for making computer-assisted depth estimates from magnetic data. Geophysics 47(1): 31-37
[2] Reid AB, Allsop JM, Granser H, Millett AT, Somerton IW (1990). Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics 55(1): 80-91
[3] Okpoli CC (2019) High resolution magnetic field signatures over Akure and its Environs, southwestern Nigeria. Earth Sci Malays 3(1): 9-17
[4] Hosseini SH, Habibian Dehkordi B, Abedi M, Oskooi B (2021) Implications for a Geothermal Reservoir at Abgarm, Mahallat, Iran: Magnetic and Magnetotelluric Signatures. Natural Resources Research 30(1): 259-272
[5] Ghiasi SM, Hosseini SH, Afshar A, Abedi M (2022) A Novel Magnetic Interpretational Perspective on Charmaleh Iron Deposit Through Improved Edge Detection Techniques and 3D Inversion Approaches. Natural Resources Research, 1-24
[6] Reid AB, Thurston JB (2014) The structural index in gravity and magnetic interpretation: Errors, uses, and abuses. Geophysics 79(4): J61-J66
[7] Reid AB, Ebbing J, Webb SJ (2014) Avoidable Euler errors–the use and abuse of Euler deconvolution applied to potential fields. Geophysical Prospecting 62(5): 1162-1168
[8] Ghanbarifar S, Hosseini SH, Abedi M, Afshar A 2023 A dynamic window-based Euler depth estimator for 2 potential field geophysical data. Bulletin of Geophysics and Oceanography, (Accepted for publication).
[9] AL-Farhan M, Oskooi B, Abedi M, Ebrahim Zadeh Ardestani V, AL-Khalidy A (2022) Implications on oil trapping in the Kifl field of Iraq through geophysical investigations. International Journal of Mining and Geo-Engineering: 56(4), 391-400
[10] AL-Farhan M, Oskooi B, Ebrahim Zadeh Ardestani V, Abedi M, AL-Khalidy A (2019) Magnetic and gravity signatures of the Kifl oil field in Iraq. Journal of Petroleum Science and Engineering: 183, 106397
[11] Abedi M (2022) Cooperative fuzzy-guided focused inversion for unstructured mesh modeling of potential field geophysics, a case study for imaging an oil-trapping structure. Acta Geophysica 70(5): 2077-2098
[12] Fedi M, Florio G, Paoletti V (2015) MHODE: a local-homogeneity theory for improved source-parameter estimation of potential fields. Geophysical Journal International 202(2): 887-900
[13] Barbosa VC, Silva JB, Medeiros WE (1999) Stability analysis and improvement of structural index estimation in Euler deconvolution. Geophysics 64(1): 48-60
[14] Salem A, Ravat D (2003) A combined analytic signal and Euler method (AN-EUL) for automatic interpretation of magnetic data. Geophysics 68(6): 1952-1961
[15] Gerovska D, Araúzo-Bravo MJ (2003) Automatic interpretation of magnetic data based on Euler deconvolution with unprescribed structural index. Computers & Geosciences 29(8): 949-960
[16] Melo FF, Barbosa VC (2018) Correct structural index in Euler deconvolution via base-level estimates. Geophysics 83(6): J87-J98
[17] Aster RC, Borchers B, Thurber C (2018) Parameter estimation and inverse problems. Academic Press, New York, NY.    
[18] Chen T. Zhang G (2018) Forward modeling of gravity anomalies based on cell mergence and parallel computing. Computers & Geosciences 120: 1-9
[19] Barbosa VC, Silva JB (2005) Deconvolução de Euler: passado, presente e futuro-um tutorial. Revista Brasileira de Geofísica 23(3): 243-250
[20] Sissakian VK (2013) Geological evolution of the Iraqi Mesopotamia Foredeep, inner platform and near surroundings of the Arabian Plate. Journal of Asian Earth Sciences 72: 152-163
[21] Abdulnaby W (2018) Structural Geology and Neotectonics of Iraq, Northwest Zagros. In book: Tectonic and Structural Framework of the Zagros Fold-Thrust Belt, 10.1016/B978-0-12-815048-1.00004-4.
[22] Sissakian VK, Mohammed BS (2007) Geology of Iraqi Western Desert. Iraqi Bull. Geol. Min. Special Issue: 51-124
[23] Fouad SFA (2010) Tectonic and structural evolution of the Mesopotamia foredeep, Iraq. Iraqi Bulletin of Geology and Mining 6: 41–53
[24] Jassim SZ, Goff JC (2006) Geology of Iraq, Czech Republic, ISBN 80-7028-287-8, pp 341. Prague, 35-52
[25] Al-Banna A (1992) Gravity lineaments, fault trends and depth of the basement rocks in Western Desert. Iraqi J. Sci., 33: 63–79
[26] Hijab BR, Aldabbas MA (2000). Tectonic evolution of Iraq. Iraqi Geological Journal 32: 26-47    
International Journal of Mining and Geo-Engineering
Volume 58, Issue 2
June 2024
Pages 121-134

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