Delineation of Prospective Hydrocarbon Zones in Parts of the Central Benue Trough, Nigeria, Using High-Resolution Aeromagnetic Data

Aeromagnetic data from parts of the Central Benue Trough were interpreted to determine sedimentary thickness and temperature at depth across the study area, with implications for hydrocarbon accumulations. Three depth estimation methods (Source parameter imaging (SPI), Standard Euler deconvolution, and Spectral analysis) were used, and the results were compared. The Source parameter imaging (SPI) ranged from -119.23 to -6045.08 m, and Standard Euler deconvolution for the structural index (SI) of 3 ranged from 608.67 to -4741.70 m. Spectral depth analysis revealed depths of deep and shallow magnetic sources, with deep sources ranging from 1.03 to 5.09 km and an average depth of 3.15 km, while shallow magnetic sources ranged from 0.21 to 1.84 km and had an average depth of 0.6 km. The temperature at depth over the study area was calculated and the results revealed temperature values ranging from 79.9 to 387.42 °C, with an average value of 154.61 °C. The southwestern, northern, northeastern and central parts were delineated as potential hydrocarbon targets areas due to appropriate sedimentary thickness and temperature. These areas corresponds to Otobi, Otukpo, Taraku, Nov, Moi Igbo, Igbor, Aliade, Ndeel, Ito, Wannune, Obi, Giringwe, Azare, and Wuse due to appropriate sedimentary thickness and temperature. Furthermore, clusters of structures, as revealed by the total horizontal gradient and first vertical derivative maps, trend predominantly NE-SW, with a cross-cutting NW-SE structure, suggesting a favourable structural system that may enable migration and entrapment of hydrocarbons within the area.

Aeromagnetic data, Sedimentary thickness, depth estimations, temperature at depth, oil and gas window, and hydrocarbon potential.

1. Abdulsalam, N.N., Ogoh, E.K. & Ologe, O. (2022). Evaluation of Structural Framework and Depth Estimates Using High-Resolution Airborne Magnetic Data over Some Parts of Middle Benue Trough, Nigeria. International Journal of Geosciences, 13, 557-575. [Google Scholar] [Crossref]

2. Adedosu, T.A., Sonibare, O.O., Ehinola, O.A., Tuo, J. & Ekundayo, O. (2015). Petroleum potential of Agwu Shale, Benue Trough, Nigeria. Energy Sources Part A: Recovery Utilization and Environmental Effects, 37(17), 1853- 1860. [Google Scholar] [Crossref]

3. Akanbi, E. S., & Udensi, E.E. (2006). Structural trends and structural depth analysis of the residual field of Pategi Area, Nigeria, using aeromagnetic data. Nigeria Journal of Physics, 18(21), 271-276. [Google Scholar] [Crossref]

4. Akande, S.O., Egenhoff, S.O., Obaje, N.G., Ojo, O.J., Adekeye, O.A. & Erdtmann, B.D (2012). Hydrocarbon potential of Cretaceous sediments in the Lower and Middle Benue Trough, Nigeria: Insights from new source rock facies evaluation. J. Afr. Earth Sci, 64, 34–47. [Google Scholar] [Crossref]

5. Cratchley, C.R. & Jones G.P. (1965). An interpretation of the geology and gravity anomalies of the Benue valley, Nigeria. Overseas Geological Surveys Geophysical paper, 1, 1-26. [Google Scholar] [Crossref]

6. Corell, L. & Grauch, V.J.S. (1985). Mapping basement magnetization zones from aeromagnetic data in the San Juan Basin, New Mexico, in Hinze, W.J., ed., the utility of regional gravity and magnetic anomaly maps, Society of Exploration Geophysicists, Tulsa, Oklahoma, pp 181–197. [Google Scholar] [Crossref]

7. Denehy, D. (2011) Fundamentals of petroleum (5th Ed) Austin, TX, Petroleum Extension Service, pp 496. [Google Scholar] [Crossref]

8. Dow, W.G. (1978). Petroleum source beds on continental slopes and rises (2). AAPG Bulletin, vol. 62. [Google Scholar] [Crossref]

9. Ekwok, S.E., Eldosouky, A.M., Thompson, E.A., Ojong, R.A., George, A.M., Alarifi, S.S., Kharbish, S., Andráš, P. and Akpan, A. E. (2024). Mapping of geological structures and sediment thickness from analysis of aeromagnetic data over the Obudu Basement Complex of Nigeria. Journal of Geophysics and Engineering. 21. 413–425. 10.1093/jge/gxae012. [Google Scholar] [Crossref]

10. El Dawi, M. G., Tianyou, H. S. & Dapeny, L. (2004). Depth estimation of 2-D magnetic anomalous sources using Euler deconvolution method. American Journal of Applied Sciences, 12(3), 239 – 258. [Google Scholar] [Crossref]

11. Eletta, B. E. & Udensi, E. E. (2012). Investigation of Curie point isotherm from the magnetic field of Easter sector of central Nigeria. Global Journal of Geosciences, 2(4), 101–106. [Google Scholar] [Crossref]

12. Gluyas, J. & Swarbrick, R. (2005). Petroleum Geoscience. Blackwell Science, Oxford, pp 358. [Google Scholar] [Crossref]

13. Hayatudeen, M., Bassey, N. E., & Rasaq, B. (2020). Magnetic modeling and potential hydrocarbon trap over Yola and environs, Upper Benue Trough, Northeastern Nigeria. Physical Science International Journal, 24(4), 10–23. [Google Scholar] [Crossref]

14. Moghaddam, M. M., Sabseparvar, M., Mirzaei, S. & Heydarian, N. (2015). Interpretation of Aeromagnetic Data to Locate Buried Faults in North of Zanjan Province, Iran. Journal of Geophysics and Remote Sensing, 4, 143. [Google Scholar] [Crossref]

15. Murat, R.C. (1972). Stratigraphy and Paleogeography of the Cretaceous and Lower Tertiary in Southern Nigeria. In African Geology, Dessauvagie T.J.F. and A.J. Whiteman (Eds.), University of Ibadan Press, Africa, 251-266. [Google Scholar] [Crossref]

16. Musa L.A ., Obaje N.G., Bomai, A., Zanna, M., Adeoye, J.A. & Oladimeji, G.R. (2022). Multivariate geo-chemo statistical characterization of potential source rocks in the Middle Benue Trough, Nigeria. European Association of Geoscientists & Engineers 83rd EAGE Annual Conference & Exhibition, 2022, 1 – 5. [Google Scholar] [Crossref]

17. Nimet. (2016). Nigeria Climate Review Bulletin 2015. Nigerian Meteorological Agency. NIMET-No.001. [Google Scholar] [Crossref]

18. Nwachukwu, J.I. (1985) Petroleum prospects of Benue Trough, Nigeria: AAPG Bulletin 1985, 69(4), 601-609. [Google Scholar] [Crossref]

19. Nwachukwu, S.O. (1972). The tectonic evolution of the Southern portion of the Benue Trough, Nigeria Geol. Mag. 109, 411-419 [Google Scholar] [Crossref]

20. Nwosu, O.B. & Onuba, L.N. (2013). Evaluation of the magnetic basement depth over parts of Middle Benue Trough Nigeria by empirical depth rule based on slope techniques using the HRAM. International Journal of Scientific & Technology Research, 2(11), 2277- 8616. [Google Scholar] [Crossref]

21. Obaje, N.G. (2004). Geology and Mineral Resources of Nigeria. Springer Verlag Berlin Heidelberg, pp 219. [Google Scholar] [Crossref]

22. Offodile, M.E. (1976). "The Geology of the Middle Benue Nigeria". Cretaceous Research, Paleontological Institute: University of Uppsala. Extra-ordinary Publication. 4, 1-166. [Google Scholar] [Crossref]

23. Obaje, N.G., Bomai, A., Zanna, M., Adeoye, J., Yusuf, I., Adamu, S., Dauda, R., Tukura, B., Gyang, S., Akwashiki, J., Adamu, L.M. & Naibi, H.S. (2022). New Insights on Potential Petroleum Systems in the Middle Benue trough of Nigeria. New Insights on Potential Petroleum Systems in the Middle Benue trough of Nigeria. European Association of Geoscientists & Engineers 83rd EAGE Annual Conference & Exhibition, 2022, 1 – 5. [Google Scholar] [Crossref]

24. Obaje, N.J. & Hamaza, H. (2000). Liquid hydrocarbon source-rock potential of mid-Cretaceous coals and Coal Measures in the Middle Benue Trough of Nigeria. International Journal of Earth Sciences, 89(1), 130-139. [Google Scholar] [Crossref]

25. Oguadinma T. C. & Aku M. O. (2019). Delineation of sedimentary thickness of Lafia and environs using aeromagnetic data. World Journal of Innovative Research, 7(2), 64-70. [Google Scholar] [Crossref]

26. Okwesili, N. A., Okeke, F. N. & Orji, P.O. (2020). Geophysical survey of aero gravity anomalies over Lafia & Akiri regions of Middle Benue Trough, Nigeria, employing Power Spectrum and Source Parameter Imaging technique. Journal of Applied Physics, 12(5), 58-6. [Google Scholar] [Crossref]

27. Olade, M.A. (1975). Evolution of Nigerian Benue Trough (Aulacogen): A tectonic model Geol. Mag. 112, 575-583. [Google Scholar] [Crossref]

28. Omenikolo, I. A., Emberga, T.T. & Opara, A.I. (2022). Basement depth re-valuation of anomalous magnetic bodies in the Lower and Middle Benue Trough using Euler deconvolution and spectral inversion techniques. World Journal of Advanced Research and Reviews, 14(2), 129 –145. [Google Scholar] [Crossref]

29. Onwuemesi, A.G. (1997). One dimensional spectral analysis of aeromagnetic anomalies and curie depth isotherm in the Anambra Basin of Nigeria. Journal of Geodynamics, 23(2), 95-107. [Google Scholar] [Crossref]

30. Onyishi, G.E. & Ugwu, G.Z. (2019). Source parameter imaging and Euler deconvolution of aeromagnetic anomalies over parts of the Middle Benue Trough, Nigeria. American Journal of Geophysics, Geochemistry and Geosystems, 5(1), 1-9. [Google Scholar] [Crossref]

31. Osinowo, O. O., & Taiwo, T. O. (2020). Analysis of high-resolution aeromagnetic (HRAM) data of Lower Benue Trough, Southeastern Nigeria, for hydrocarbon potential evaluation. NRIAG Journal of Astronomy and Geophysics, 9(1), 350–361. [Google Scholar] [Crossref]

32. Opara, A.I., Odumosu, G.E., Akaolisa, C.Z., Onyekuru, S.O., Eberga, T.T. & Onu, .N.N. (2018). Basement depth re-evaluation and structural kinematic analysis of part of the Middle Benue Trough using High Resolution Aeromagnetic Data. Futo Journal Series, 4(1), 409 – 436. [Google Scholar] [Crossref]

33. Rabeh, T. (2009). Prospecting for the ferromagnetic mineral accumulations using the magnetic method at the Eastern Desert, Egypt. Journal of Geophysics and Engineering, 6(4), 401-411. [Google Scholar] [Crossref]

34. Reid, A. B., Allsop, J. M., Granser, H., Millet, A. J., and Somerton, I. W. (1990). Magnetic interpretation in three dimensions using Euler deconvolution. Geophysics, 55, 80-9. [Google Scholar] [Crossref]

35. Reyment, R.A., 1965. Aspects of Geology of Nigeria. University of Ibadan Press, Ibadan, Nigeria, 133. [Google Scholar] [Crossref]

36. Short, K.C. & Stauble, A.J. (1967). Outline of geology of Niger Delta. AAPG Bull. 51, 761-779. [Google Scholar] [Crossref]

37. Solako, K.A., Adetona, A.A., Rafiu, A.A., Alahassan, U.D., Aliyu, A. & Adewumi T. (2020). Assessment of Geothermal potential of parts of the Middle Benue Trough North East Nigeria. Journal of Earth and Space Physics, 45(4), 27-42. [Google Scholar] [Crossref]

38. Spector, A. & Grant, F.S. (1970). Statistical models for interpretation of aeromagnetic data. Geophysics 35, 293-302. [Google Scholar] [Crossref]

39. Tanaka, A., Okubo, Y. & Matsubayash, O. (1999). Curie point depth based on spectral analysis of the magnetic anomaly data in East and South-East Asia. [Google Scholar] [Crossref]

40. Telford, W. M., Geldart, L. P. & sheriff, R. E. (1990). Applied geophysics. Cambridge University Press, Second Edition. [Google Scholar] [Crossref]

41. Thompson, D. T. (1982). A new technique for making computer-assisted depth estimates from magnetic data. Geophysics, 47(1), 31-37. [Google Scholar] [Crossref]

42. Thurston, J. B. & Smith R.S. (1997). Automatic conversion of magnetic data to depth, dip, and susceptibility contrast using the SPITM method. Geophysics, 62,807-813 [Google Scholar] [Crossref]

43. Ugwuoke, C.C. and Chinwuko, A. I (2023) mapping the subsurface structures and sedimentary thicknesses in parts of middle Benue trough, Nigeria using interpretation of aeromagnetic data. Journal of Basic Physical Research ISSN: 2141-8403, 11(1) [Google Scholar] [Crossref]

44. Verduzco, B., Fairhead, J. D., Green, C. M. & MacKenzie .C. (2004). The meter reader – new insights into magnetic derivatives for structural mapping. The Leading Edge. 2004, 23, 116–119. [Google Scholar] [Crossref]

45. Whitehead, N. & Musselman, C. (2005). Montaj TM Grav/Mag interpretation: Processing, analysis and visualization system for 3D inversion of potential field data for Oasis Montaj v 6.1. Geosoft Inc. ON, Canada. [Google Scholar] [Crossref]

46. Whiteman, A., (1982). Nigeria: Its Petroleum Geology, Resources and Potential. Graham and Trotham, London. [Google Scholar] [Crossref]

47. Wright, J.B., Hastings, D. A., Jones, W. B., & Williams, H. R. (1985). Geology and Mineral Resources of West Africa. George Allen and Unwin (Publishers) Limited, London, UK, pp187. [Google Scholar] [Crossref]

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