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Sedimentation, depositional environments, and hydrocarbon potential of the Maastrichtian-Paleocene Araromi Formation, eastern Dahomey (Benin) Basin, southwestern Nigeria

Oluwajana, O. A.; Opatola, A. O.; Adamolekun, Olajide Jonathan ORCID iD icon 1; Ndukwe, O. S.; Olawuyi, G. T.; Ofiwe, C. U.; Bolaji, T. A.; Adebambo, B. A.; Oluwajana, O. O.
1 Institut für Angewandte Geowissenschaften (AGW), Karlsruher Institut für Technologie (KIT)

Abstract:

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 (F$_{1}$); medium to coarse-grained sandstone (F$_{2}$); lower loosely consolidated sandstone (F$_{3}$); and shale and siltstone (F$_{4}$). 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 S$_{2}$ (hydrocarbon-generating potential) values ranging from 0.26 to 0.70 mgHC/g rock, indicating poor source rocks. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000137488
Veröffentlicht am 21.09.2021
Originalveröffentlichung
DOI: 10.1007/s13202-021-01262-7
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2190-0558, 2190-0566
KITopen-ID: 1000137488
Erschienen in Journal of Petroleum Exploration and Production Technology
Verlag Springer
Band 11
Seiten 3917–3934
Vorab online veröffentlicht am 26.08.2021
Nachgewiesen in Scopus
Dimensions
Web of Science
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