Characterization of Depositional Environments and Hydrocarbon Potential in the AI Well Niger Delta Basin
Keywords:
Agbada Formation, depositional environment, reservoir quality, petrography, Niger Delta BasinAbstract
Reservoir characterization is essential for understanding subsurface geology, supporting hydrocarbon exploration, and improving production strategies. This study investigates the AI Well within the Agbada Formation of the Niger Delta Basin through an integrated sedimentological, petrographic, and geochemical approach. A total of 100 ditch cutting samples were analyzed to evaluate lithofacies, mineralogical composition, and geochemical variations. The results indicate a depositional transition from high-energy fluvial to low-energy marine environments, with quartz-rich sandstones serving as primary reservoir units and clay-rich shales acting as effective seals. Petrographic and X-ray diffraction (XRD) analyses show that quartz is the dominant framework mineral, whereas kaolinite and chlorite are associated with reduced porosity and permeability. X-ray fluorescence (XRF) results reveal silica enrichment and ferruginization, indicating post-depositional diagenetic alterations that influence reservoir quality. The findings emphasize that both depositional facies and diagenetic processes play vital roles in controlling reservoir performance. This study underscores the significance of multidisciplinary integration in refining reservoir models and optimizing hydrocarbon recovery in the Niger Delta Basin.
References
Adebayo, O.F., Ojo, A.O., 2014. Miocene-Pliocene vegetation and climate dynamics of the Niger Delta Basin based on palynological signatures. Journal of Environmental Earth Sciences 4 (6), 58-67.
Agbasi, E.O., Etuk, E.S., Abdulaziz, M.A., Joseph, I.N., Robert, W.U., 2020. Estimation of Original Oilin Place Using Pickett’s and Buckle’s Plots, Offshore Niger Delta, Nigeria. Petroleum and Coal 62 (4), 1279-1288.
Aigbadon, G.O., Okoro, A.U., Una, C.O., Ocheli, A., 2017. Depositional facies model and reservoir characterization of Usani field 1, Niger Delta basin, Nigeria. International Journal of Advanced Geosciences 5 (2), 57-68.
Amiewalan, F.O. Balogun, F.O., Ejairu, K., 2020. Sedimentological and geochemical characterization of DF-2 well, Onshore Western Niger Delta: Implications for provenance, tectonic history, and paleo depositional conditions. Global Journal of Pure and Applied Sciences 26 (2), 141-155.
Asquith, G., Krygowski, D., 2004. Basic Well Log Analysis. AAPG Methods in Exploration Series16. Tulsa, Oklahoma: The American Associaton of Petroleum Geologist.
Boggs, J.S., 2009. Petrology of Sedimentary Rocks. Cambridge, U.K.: Cambridge University Press.
Corredor, F., Shaw, J.H., Bilotti, F., 2005. Structural styles in the deep-water fold and thrust belts of the Niger Delta. AAPG Bulletin 89 (6), 753-780.
Doust, H., Omatsola, E., 1990. Niger Delta, in Divergent/Passive Margin Basins, J. D. Edwards and P. A. Santogrossi, Eds. Tulsa, OK, USA: American Association of Petroleum Geologists, 239-248.
Evamy, B.D., Haremboure, J., Kamerling, P., Knaap, W.A., Molloy, F.A., Rowlands, P.H., 1978. Hydrocarbon habitat of Tertiary Niger Delta. AAPG Bulletin 62 (1), 1-39.
Fathy, D., El-Balkiemy, A.F., Makled, W.A., Hosny, A.M., 2023. Organic geochemical signals of Paleozoic rocks in the southern Tethys, Siwa Basin, Egypt: Implications for source rock characterization and petroleum system. Physics and Chemistry of the Earth 130, 103393. https://doi.org/10.1016/j.pce.2023.103393.
Inyang, N.J., Agbasi, O.E., Etuk, S.E., Akaolisa, C.C.Z., Robert, U.W., 2022. Shale Gas Potential ofEocene Shale of Agbada Formation: A Paradigm Shift in Gas Resource Perception-A Case Study of the Niger Delta. Arabian Journal of Geosciences 15 (12), 1141. http://dx.doi.org/10.1007/s12517-022-10376-z.
Lee, E.Y., Fathy, D., Xiang, X., Spahić, D., Ahmed, M.S., Fathi, E., Sami, M., 2025. Middle Miocene syn-rift sequence on the central Gulf of Suez, Egypt: Depositional environment, diagenesis, and their roles in reservoir quality. Marine and Petroleum Geology 174, 107305. https://doi.org/10.1016/j.marpetgeo.2025.107305.
Maju-Oyovwikowhe, G.E., Lucas, F.A., 2019. Depositional facies analysis using core samples from the greater Ughelli Depobelt, Niger Delta Basin, Nigeria. Journal of Applied Science and Environmental Management 23 (6), 1137-1146.
Maju-Oyovwikowhe, G.E., Okudibie, E.J., 2023. Sedimentological and petrographic analysis of sidewall samples from the Niger Delta Basin, Nigeria: Implications for depositional environments and reservoir quality. Journal of Energy Technology and Environment 5 (2), 211-227. https://doi.org/10.5281/zenodo.8026290.
Nton, M.E., Rotimi, S., 2016. Reservoir Characteristics and Palaeo Depositional Environment of Duski Field, Onshore, Niger-Delta, Nigeria. Global Journal of Geological Sciences 14 (1), 49. https://doi.org/10.4314/gjgs.v14i1.5.
Obaje, N.G., 2009. Geology and Mineral Resources of Nigeria. Berlin, Germany: Springer-Verlag.
Okoli, A.E., Agbasi, O.E., Lashin, A.A., Sen, S., 2021. Static Reservoir Modeling of the Eocene Clastic Reservoirs in the Q-Field, Niger Delta, Nigeria. Natural Resources Research 30 (2), 1411-1425. https://doi.org/10.1007/s11053-020-09804-2.
Olayiwola, A.M., Bamford, K.M., 2019. Depositional Environment and Reservoir Characterization of the Deep Offshore Upper Miocene to Early Pliocene Agbada Formation, Niger delta, Nigeria. Journal of African Earth Sciences 159, 103578. https://doi.org/10.1016/j.jafrearsci.2019.103578.
Onyekuru, O.S., Oluchi, N.J., Agbasi, O.E., Martyushev, D.A., Chukwuma, I.J., 2023. Evaluation of Depositional Environments and Reservoir Quality of Sediments in ‘OLI’ Field, Offshore, Niger Delta, Nigeria. Arabian Journal of Geosciences 16 (2), 138. http://dx.doi.org/10.1007/s12517-023-11250-2.
Overare, B., Azmy, K., Garzanti, E., Avwenagha, E.O., Emudianughe, J.E., 2024. Diagenetic imprints in the reservoirs of Agbada Formation, Niger Delta Basin: Implication for reservoir quality and appraisal of calcite cement. Marine and Petroleum Geology 163, 106746.
Qi, Y., Gan, S., Yuan, X., Hu, L., Hu, J., Zhao, H., Lu, C., 2024. Research on the quantitative inversion of soil iron oxide content using hyperspectral remote sensing and machine learning algorithms in the Lufeng annular structural area of Yunnan, China. Sensors 24 (21), 7039.
Reijers, T.J.A., 2011. Stratigraphy and Sedimentology of the Niger Delta. Geologos 17 (3). 133-162. https://doi.org/10.2478/v10118-011-0008-3.
Selley, R.C., Sonnenberg, S.A., 2014. Elements of Petroleum Geology, 3rd ed. Amsterdam, Netherlands: Academic Press.
Short, K.C., Stauble, A.J., 1967. Outline of the Geology of the Niger Delta. AAPG Bulletin 51, 761-779. https://doi.org/10.1306/5d25b57d-16c1-11d7-8645000102c1865d.
Weber, K.J., Daukoru, E.M., 1975. Petroleum Geological Aspects of Niger Delta, Tokyo. Ninth World Petroleum Congress Proceedings, 1975; 5 (2), 209-221.
Whiteman, A., 1982. Nigeria: Its Petroleum Geology, Resources and Potential, Vols. 1 & 2. London, U.K.: Graham & Trotman.
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Copyright (c) 2025 Efetobore Maju-Oyovwikowhe, Stephine Aisosa Egharevba, Godwin Okumagbe Aigbadon, Sarah Itohan Aduwa
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