Olajide Jonathan Adamolekun

@kit.edu

Department of Structural Geology and Tectonics, Institute of Applied Geosciences, Karlsruhe Institute of Technology (KIT)
Karlsruhe Institute of Technology (KIT), Karlsruhe, Baden-Württemberg, Germany

Olajide Jonathan Adamolekun


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https://researchid.co/adamolekunoj

EDUCATION

Doctorate (Dr. rer. 04/2019 - 12/2022
Karlsruhe Institute of Technology (KIT), Germany

RESEARCH INTERESTS

Reservoir Geology | Reservoir modeling | Seismic to simulation | Petroleum Geology | Fieldwork | Sedimentology | Petrography | Diagenesis
5

Scopus Publications

163

Scholar Citations

4

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • n-Alkane bound biomarker fingerprints from asphaltenes in the bitumens of Eastern Dahomey Basin, Nigeria: Source and genetic implications
    Modupe A. Egbeola, Olubunmi C. Adeigbe, Olajide J. Adamolekun
    Petroleum Research, 2024
    The asphaltene fractions of the bitumens of Eastern Dahomey Basin in Nigeria, were analyzed by flash pyrolysis-gas chromatography (Py-GC) method in order to unravel its geochemical history and properties. The distributions of the initial biomarkers of the original oils from the pyrolysates are related to the assessment of organic matter source, paleo-redox conditions and source environment during deposition. Also, it effectively establishes the genetic relationship of the bitumens. The n-alkane distributions in the pyrolysates reveal nC9-nC32 n-alkanes, maximizing at nC14, isoprenoids-pristane (Pr) and phytane (Ph), and some n-alkene peaks. High peaks of low to medium-weight nC9-nC20 n-alkanes and low peaks of nC21+ n-alkanes characterize the distributions. These reveal that abundant algal organic matter with some terrigenous inputs contributed to the source rock of the bitumens. The high concentration of marine organic matter inputs to the source rock is further confirmed by the nC17/nC27 ratios which range from 5.39 to 19.82 and shows the predominance of nC17 alkanes. The general unimodal n-alkane distributions in the bitumens indicate derivation from similar organic matter types showing that they are genetically related. The anoxic to suboxic environmental conditions that prevailed during the deposition of the sediments is revealed by the isoprenoids, Pr/Ph ratios (0.72–1.28). Pristane/nC17 and Phytane/nC18 range from 0.16 to 0.33 and 0.22 to 0.56, revealing that the bitumens were from predominantly marine organic matter (type II kerogen) preserved in a reducing environment with no evidence of biodegradation. However, the Ph/nC18 ratio and the cross plot of Pr+Ph/nC17+nC18 allow the classification of the bitumens into two subfamilies/groups (A and B). The bitumen samples have low wax content as indicated by the degree of waxiness ranging from 0.21 to 0.38 which confirms low terrigenous input. Based on the carbon preference index (CPI: 0.92 to 1.55) and odd-even predominance (OEP: 0.70 to 1.36), it is concluded that the bitumens are immature to marginally mature.
  • A comprehensive review of the potential of rock properties alteration during CO2 injection for EOR and storage
    Dorcas S. Eyinla, Smith Leggett, Foued Badrouchi, Hossein Emadi, Olajide J. Adamolekun, Olumuyiwa T. Akinsanpe
    Fuel, 2023
  • Diagenetic evolution of continental to shallow marine Mesozoic–Cenozoic deposits, Eastern Dahomey Basin, Nigeria: Implications for reservoir quality
    Olajide J. Adamolekun, Benjamin Busch, Oladotun A. Oluwajana, Michael P. Suess, Christoph Hilgers
    Zeitschrift Der Deutschen Gesellschaft Fur Geowissenschaften, 2023
  • Petrography and reservoir quality controls in shallow transitional marine Cretaceous-Paleogene deposits in the Dahomey Basin, Nigeria
    Olajide J. Adamolekun, Benjamin Busch, Michael P. Suess, Nicolaas Molenaar, Christoph Hilgers
    Journal of African Earth Sciences, 2022
  • Sedimentation, depositional environments, and hydrocarbon potential of the Maastrichtian-Paleocene Araromi Formation, eastern Dahomey (Benin) Basin, southwestern Nigeria
    Oladotun Afolabi Oluwajana, Abraham Olatunji Opatola, Olajide Jonathan Adamolekun, Otobong Sunday Ndukwe, Gabriel Toluwalope Olawuyi, Collins Uche Ofiwe, Taiwo Ayodele Bolaji, Bamidele Adeniyi Adebambo, Oladipo Omoniyi Oluwajana
    Journal of Petroleum Exploration and Production Technology, 2021
    The Cretaceous sediments in southwestern Nigeria are host to one of the largest bitumen deposits in the world. In the current paper, an integrated study on sedimentology, palynology, and applied petroleum geochemistry of the Maastrichtian-Paleocene Araromi Formation was used to determine the depositional environments and hydrocarbon potentials of the formation on the eastern Dahomey Basin. Four sedimentary lithofacies were identified from core samples, namely, lower limestone (F1); medium to coarse-grained sandstone (F2); lower loosely consolidated sandstone (F3); and shale and siltstone (F4). Sedimentation in the eastern Dahomey Basin occurred mainly in fluvial and shallow-marine (shelf) environments. The palynological assemblages of the Araromi Formation reflect deposition in coastal through brackish water to shallow shelf environment with periods of localized wind-induced storms. The shale and siltstone samples of the Araromi Formation are characterized by total organic carbon (TOC) values of up to 2.50 wt % and S2 (hydrocarbon-generating potential) values ranging from 0.26 to 0.70 mgHC/g rock, indicating poor source rocks. Shales show poor quality and thermally immature organic matter at shallow depth and could neither have generated liquid hydrocarbon nor contributed to the heavy oil occurrence on the bitumen and tar-sand belt of eastern Dahomey (Benin) Basin.

RECENT SCHOLAR PUBLICATIONS

  • n-Alkane bound biomarker fingerprints from asphaltenes in the bitumens of Eastern Dahomey Basin, Nigeria: Source and genetic implications
    MA Egbeola, OC Adeigbe, OJ Adamolekun
    Petroleum Research 9 (1), 85-91 , 2024
    2024
    Citations: 4
  • A comprehensive review of the potential of rock properties alteration during CO2 injection for EOR and storage
    DS Eyinla, S Leggett, F Badrouchi, H Emadi, OJ Adamolekun, ...
    Fuel 353, 129219 , 2023
    2023
    Citations: 97
  • Diagenetic evolution of continental to shallow marine Mesozoic–Cenozoic deposits, Eastern Dahomey Basin, Nigeria: Implications for reservoir quality
    OJ Adamolekun, B Busch, OA Oluwajana, MP Suess, C Hilgers
    Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) 174 (1 … , 2023
    2023
    Citations: 3
  • Reservoir quality controls and reservoir modelling of continental to transitional shallow marine sedimentary basins of Southern Nigeria
    OJ Adamolekun
    Karlsruhe Institute of Technology (KIT), https://doi.org/10.5445/KSP/1000156506 , 2023
    2023
    Citations: 1
  • Petrography and reservoir quality controls in shallow transitional marine Cretaceous-Paleogene deposits in the Dahomey Basin, Nigeria
    OJ Adamolekun, B Busch, MP Suess, N Molenaar, C Hilgers
    Journal of African Earth Sciences 186, 104437 , 2022
    2022
    Citations: 13
  • Sedimentation, depositional environments, and hydrocarbon potential of the Maastrichtian-Paleocene Araromi Formation, eastern Dahomey (Benin) Basin, southwestern Nigeria
    OA Oluwajana, AO Opatola, OJ Adamolekun, OS Ndukwe, GT Olawuyi, ...
    Journal of Petroleum Exploration and Production Technology 11 (11), 3917-3934 , 2021
    2021
    Citations: 10
  • Geochemistry of Ekenkpon and Nkporo shales, Calabar flank, SE Nigeria: implications for provenance, transportation history and depositional environment
    ME Nton, OS Akpan, OJ Adamolekun
    Global Journal of Geological Sciences 16 (1), 63-78 , 2018
    2018
    Citations: 1
  • Occurrence and Environmental Implications of Calcareous Nannofossils in Surface Sediments of the Western Gulf of Guinea: off Lagos Coast, South-western Nigeria
    OJ Adamolekun, EE Umoh
    Journal of Environment and Earth Science 6 (6), 114-128 , 2016
    2016
    Citations: 3
  • Sedimentological and geochemical characteristics of outcrop sediments of Southern Bida Basin, Central Nigeria: implications for provenance, paleoenvironment and tectonic history
    ME Nton, OJ Adamolekun
    Ife Journal of Science 18 (2), 345-369 , 2016
    2016
    Citations: 31

MOST CITED SCHOLAR PUBLICATIONS

  • A comprehensive review of the potential of rock properties alteration during CO2 injection for EOR and storage
    DS Eyinla, S Leggett, F Badrouchi, H Emadi, OJ Adamolekun, ...
    Fuel 353, 129219 , 2023
    2023
    Citations: 97
  • Sedimentological and geochemical characteristics of outcrop sediments of Southern Bida Basin, Central Nigeria: implications for provenance, paleoenvironment and tectonic history
    ME Nton, OJ Adamolekun
    Ife Journal of Science 18 (2), 345-369 , 2016
    2016
    Citations: 31
  • Petrography and reservoir quality controls in shallow transitional marine Cretaceous-Paleogene deposits in the Dahomey Basin, Nigeria
    OJ Adamolekun, B Busch, MP Suess, N Molenaar, C Hilgers
    Journal of African Earth Sciences 186, 104437 , 2022
    2022
    Citations: 13
  • Sedimentation, depositional environments, and hydrocarbon potential of the Maastrichtian-Paleocene Araromi Formation, eastern Dahomey (Benin) Basin, southwestern Nigeria
    OA Oluwajana, AO Opatola, OJ Adamolekun, OS Ndukwe, GT Olawuyi, ...
    Journal of Petroleum Exploration and Production Technology 11 (11), 3917-3934 , 2021
    2021
    Citations: 10
  • n-Alkane bound biomarker fingerprints from asphaltenes in the bitumens of Eastern Dahomey Basin, Nigeria: Source and genetic implications
    MA Egbeola, OC Adeigbe, OJ Adamolekun
    Petroleum Research 9 (1), 85-91 , 2024
    2024
    Citations: 4
  • Diagenetic evolution of continental to shallow marine Mesozoic–Cenozoic deposits, Eastern Dahomey Basin, Nigeria: Implications for reservoir quality
    OJ Adamolekun, B Busch, OA Oluwajana, MP Suess, C Hilgers
    Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) 174 (1 … , 2023
    2023
    Citations: 3
  • Occurrence and Environmental Implications of Calcareous Nannofossils in Surface Sediments of the Western Gulf of Guinea: off Lagos Coast, South-western Nigeria
    OJ Adamolekun, EE Umoh
    Journal of Environment and Earth Science 6 (6), 114-128 , 2016
    2016
    Citations: 3
  • Reservoir quality controls and reservoir modelling of continental to transitional shallow marine sedimentary basins of Southern Nigeria
    OJ Adamolekun
    Karlsruhe Institute of Technology (KIT), https://doi.org/10.5445/KSP/1000156506 , 2023
    2023
    Citations: 1
  • Geochemistry of Ekenkpon and Nkporo shales, Calabar flank, SE Nigeria: implications for provenance, transportation history and depositional environment
    ME Nton, OS Akpan, OJ Adamolekun
    Global Journal of Geological Sciences 16 (1), 63-78 , 2018
    2018
    Citations: 1