| Autor: |
Omenikolo, I. A., Opara, A. I., Okereke, C. N, Ikoro, D. O., Emberga, T. T., Agoha, C. C., Nwokeabia, C. N. |
| Předmět: |
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| Zdroj: |
Petroleum & Coal; 2023, Vol. 65 Issue 1, p138-152, 15p |
| Abstrakt: |
Spectral analysis of high-resolution airborne magnetic data of part of Benue Trough was used to estimate the depths of anomalous magnetic sources within the study area. This paper was aimed at the determination of sedimentary thickness of the study area and to infer favourable areas for possible petroleum exploration. Several data enhancement techniques were used to digitally enhance the data to improve the signal-to-noise ratio. The total magnetic intensity was subjected to regional - residual separation using polynomial fitting of the first order, with the residual field revealing magnetic intensity values ranging from -79.8 to -16.5nT. Several clusters of circular magnetic anomaly closures with very clear amplitudes which occur especially in the northern and mid part of the area revealed edges of intrusive bodies. The structures observed within the location from the residual maps revealed dominant trends in the NE-SW and N-S direction. The result of 2D spectral analysis revealed a two-depth model, with the depth to the first layer (D1) varying from 0.135 km to 0.200 km with an average depth of 0.158 km while second layer depth (D2) varies from 2.585 km to 4.878 km with the average depth of 3.415 km. This result therefore, indicates that the average basement depth of the study area as deduced from power spectrum inversion is about 3.415km. The mean sedimentary thickness of 3.415km obtained and the near absence of intrusive bodies especially in the northern part of the study area thus reveal favourable conditions for hydrocarbon exploration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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