مجله ژئوفیزیک ایران

مجله ژئوفیزیک ایران

Mapping the shallow-to-deep subsurface structural elements to determine the thermal region and hydrocarbon potential of Gongola basin, NE Nigeria

مقالات آماده انتشار

نوع مقاله : مقاله پژوهشی‌

نویسندگان
Taiwo Adewumi 1
Oladiran Johnson Abimbola 2
Abubarka Umar Madaki 3
Babatope Ebenezer Faweya 4
Kazeem Adeyinka Salako 5
Nordiana Mohd Muztaza 6
Fidelis Iorzua Kwaghhua 7
1 Assistant Professor, Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
2 Professor, Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
3 M.Sc., Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
4 Professor, Department of Physics, Faculty of Science, Ekiti State University, Nigeria
5 Professor, Department of Geophysics, School of Physical Science, Federal University of Technology Minna, Nigeria
6 School of Physics, University Sains Malaysia (USM), Malaysia
7 Ph.D. Student,Professor, Department of Geophysics, School of Physical Science, Federal University of Technology Minna, Nigeria
10.30499/ijg.2025.510947.1682
چکیده
The study aims to provide new insights into the subsurface crustal and thermal structures of the Gongola Basin, NE Nigeria, using airborne magnetic and gamma-ray spectrometric datasets for hydrocarbon prospecting. The total magnetic field, reduced to the magnetic equator (TMI-RTE), underwent various enhancement techniques and depth estimation methods, including vertical derivative (VD), Rose diagram (RD), source parameter imaging (SPI), and 2D magnetic depth modelling to distinctly map the subsurface geological structural elements, basement architecture, and the depth to the top of the magnetic basement. Conversely, the radiogenic heat production (RHP) and regions favourable for hydrocarbon maturation and accumulation were determined via thorium normalisation techniques (TNT) from the concentration of radioactive elements (K, eTh, and eU). The FVD, SVD, and RD indicate that the dominant structures within the study area trend northeast-southwest, north-northeast-south-southwest, and northwest-southeast, which may serve as migratory pathways or traps for hydrocarbon accumulation. Additionally, the SPI and the 2D magnetic depth models reveal that the thickness of the sedimentary beds ranges from over 1000 m to over 5000 m. Depths between 3000 m and 5000 m can be found in the central, eastern, southeastern, and northeastern parts of the study area. These areas correspond to Alkaleri, Akko, Gombe, Futuk, Yuli, and Debar Fulani, respectively. The depth range of 3000 m to 5000 m is sufficient for hydrocarbon maturation and accumulation. The positive DRAD values indicate zones of probable hydrocarbon potential. The estimated total RHP rates for the study area range from 289.4 to 1477.6 ρwkg-1. The RHP values exceeding 797.87 Wkg-1 obtained in the Keri-Keri Formation (Kst) and Pindiga Formation (Psh are attributable to clay, limestone, shale, and sandstone. This falls within the moderate RHP range (750–1500 ρWkg-1), which is adequate for hydrocarbon maturation and accumulation in the study area.
 
کلیدواژه‌ها
Gamma-ray spectrometry, hydrocarbon prospecting, radiogenic heat production, thorium normalisation techniques, subsurface crustal

موضوعات

عنوان مقاله English

Mapping the shallow-to-deep subsurface structural elements to determine the thermal region and hydrocarbon potential of Gongola basin, NE Nigeria

نویسندگان English

Taiwo Adewumi 1
Oladiran Johnson Abimbola 2
Abubarka Umar Madaki 3
Babatope Ebenezer Faweya 4
Kazeem Adeyinka Salako 5
Nordiana Mohd Muztaza 6
Fidelis Iorzua Kwaghhua 7
1 Assistant Professor, Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
2 Professor, Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
3 M.Sc., Department of Physics, Faculty of Science, Federal University of Lafia, Nigeria
4 Professor, Department of Physics, Faculty of Science, Ekiti State University, Nigeria
5 Professor, Department of Geophysics, School of Physical Science, Federal University of Technology Minna, Nigeria
6 School of Physics, University Sains Malaysia (USM), Malaysia
7 Ph.D. Student,Professor, Department of Geophysics, School of Physical Science, Federal University of Technology Minna, Nigeria
چکیده English

The study aims to provide new insights into the subsurface crustal and thermal structures of the Gongola Basin, NE Nigeria, using airborne magnetic and gamma-ray spectrometric datasets for hydrocarbon prospecting. The total magnetic field, reduced to the magnetic equator (TMI-RTE), underwent various enhancement techniques and depth estimation methods, including vertical derivative (VD), Rose diagram (RD), source parameter imaging (SPI), and 2D magnetic depth modelling to distinctly map the subsurface geological structural elements, basement architecture, and the depth to the top of the magnetic basement. Conversely, the radiogenic heat production (RHP) and regions favourable for hydrocarbon maturation and accumulation were determined via thorium normalisation techniques (TNT) from the concentration of radioactive elements (K, eTh, and eU). The FVD, SVD, and RD indicate that the dominant structures within the study area trend northeast-southwest, north-northeast-south-southwest, and northwest-southeast, which may serve as migratory pathways or traps for hydrocarbon accumulation. Additionally, the SPI and the 2D magnetic depth models reveal that the thickness of the sedimentary beds ranges from over 1000 m to over 5000 m. Depths between 3000 m and 5000 m can be found in the central, eastern, southeastern, and northeastern parts of the study area. These areas correspond to Alkaleri, Akko, Gombe, Futuk, Yuli, and Debar Fulani, respectively. The depth range of 3000 m to 5000 m is sufficient for hydrocarbon maturation and accumulation. The positive DRAD values indicate zones of probable hydrocarbon potential. The estimated total RHP rates for the study area range from 289.4 to 1477.6 ρwkg-1. The RHP values exceeding 797.87 Wkg-1 obtained in the Keri-Keri Formation (Kst) and Pindiga Formation (Psh are attributable to clay, limestone, shale, and sandstone. This falls within the moderate RHP range (750–1500 ρWkg-1), which is adequate for hydrocarbon maturation and accumulation in the study area.
 

کلیدواژه‌ها English

Gamma-ray spectrometry, hydrocarbon prospecting, radiogenic heat production, thorium normalisation techniques, subsurface crustal
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مجله ژئوفیزیک ایران

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